TWI627728B - White light emitting device - Google Patents

White light emitting device Download PDF

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TWI627728B
TWI627728B TW106117689A TW106117689A TWI627728B TW I627728 B TWI627728 B TW I627728B TW 106117689 A TW106117689 A TW 106117689A TW 106117689 A TW106117689 A TW 106117689A TW I627728 B TWI627728 B TW I627728B
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light
layer
light emitting
emitting
emitting layer
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TW106117689A
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TW201901921A (en
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吳忻蕙
陳重嘉
李孟庭
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友達光電股份有限公司
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Priority to CN201710580788.1A priority patent/CN107316886B/en
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30Devices specially adapted for multicolour light emission
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H10K50/131OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30Devices specially adapted for multicolour light emission
    • H10K59/35Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一種白光發光元件,具有第一發光區域及第二發光區域。白光發光元件包括第一發光單元、第二發光單元及連接層。第一發光單元包括第一電極層及第一發光層,其中第一發光層配置於第一電極層上且位於第一發光區域及第二發光區域中。第二發光單元包括位於第一發光區域及第二發光區域中的第二發光層及配置於第二發光層上的第二電極層。連接層位於第一發光單元與第二發光單元之間,以使第一發光單元與第二發光單元串聯,其中第一發光單元與第二發光單元中的至少一者包括至少一圖案化發光層,至少一圖案化發光層位於第一發光區域或第二發光區域中。A white light emitting element includes a first light emitting area and a second light emitting area. The white light emitting element includes a first light emitting unit, a second light emitting unit, and a connection layer. The first light emitting unit includes a first electrode layer and a first light emitting layer. The first light emitting layer is disposed on the first electrode layer and is located in the first light emitting region and the second light emitting region. The second light emitting unit includes a second light emitting layer located in the first light emitting region and the second light emitting region, and a second electrode layer disposed on the second light emitting layer. The connection layer is located between the first light emitting unit and the second light emitting unit, so that the first light emitting unit and the second light emitting unit are connected in series, wherein at least one of the first light emitting unit and the second light emitting unit includes at least one patterned light emitting layer. At least one patterned light emitting layer is located in the first light emitting area or the second light emitting area.

Description

白光發光元件White light emitting element

本發明是有關於一種發光元件,且特別是有關於一種白光發光元件。The present invention relates to a light emitting element, and more particularly to a white light emitting element.

白光發光二極體已廣泛地應用在顯示器與照明方面的領域。現有一種堆疊式白光元件,其是將藍色發光二極體元件與紅-綠色發光二極體元件堆疊在一起以使發出的色光混合成白光。然而,以目前材料發展水準而言,藍色發光材料相較於紅、綠色發光材料在發光效率以及壽命上都有顯著落差;在整體光學設計上,也因為需考量紅-綠色發光二極體的效率而無法直接針對藍色發光二極體進行優化,因而目前此種堆疊式白光元件的發光效率仍有限,並且在長時操作後藍光強度會明顯降低。如此一來,此種堆疊式白光元件在照明或顯示器的應用上都會在長時操作後發生光色改變、可靠度不佳的問題。White light emitting diodes have been widely used in the fields of displays and lighting. There is currently a stacked white light element, which stacks a blue light emitting diode element and a red-green light emitting diode element together to mix the emitted color light into white light. However, at the current level of material development, compared with red and green light-emitting materials, blue light-emitting materials have significant differences in luminous efficiency and life; in the overall optical design, because of the need to consider red-green light-emitting diodes Efficiency cannot be directly optimized for blue light-emitting diodes, so the current luminous efficiency of such stacked white light elements is still limited, and the blue light intensity will be significantly reduced after long-term operation. In this way, in the application of lighting or display, such stacked white light elements will have problems of light color change and poor reliability after long-term operation.

本發明提供一種白光發光元件,其可有效地優化白光發光元件所射出的特定色光,以提升該色光的發光效率。The invention provides a white light emitting element, which can effectively optimize a specific color light emitted by the white light emitting element to improve the light emitting efficiency of the color light.

本發明的白光發光元件具有第一發光區域及第二發光區域,且包括第一發光單元、第二發光單元及連接層。第一發光單元包括第一電極層及第一發光層。第一發光層配置於第一電極層上且位於第一發光區域及第二發光區域中。第二發光單元包括第二發光層及第二電極層。第二發光層位於第一發光區域及第二發光區域中。第二電極層配置於第二發光層上。連接層位於第一發光單元與第二發光單元之間,以使第一發光單元與第二發光單元串聯,其中第一發光單元與第二發光單元中的至少一者包括至少一圖案化發光層,至少一圖案化發光層位於第一發光區域或第二發光區域中。The white light emitting element of the present invention has a first light emitting region and a second light emitting region, and includes a first light emitting unit, a second light emitting unit, and a connection layer. The first light emitting unit includes a first electrode layer and a first light emitting layer. The first light emitting layer is disposed on the first electrode layer and is located in the first light emitting region and the second light emitting region. The second light emitting unit includes a second light emitting layer and a second electrode layer. The second light emitting layer is located in the first light emitting region and the second light emitting region. The second electrode layer is disposed on the second light emitting layer. The connection layer is located between the first light emitting unit and the second light emitting unit, so that the first light emitting unit and the second light emitting unit are connected in series, wherein at least one of the first light emitting unit and the second light emitting unit includes at least one patterned light emitting layer. At least one patterned light emitting layer is located in the first light emitting area or the second light emitting area.

基於上述,本發明的白光發光元件包括第一發光單元、第二發光單元及連接第一發光單元和第二發光單元的連接層,其中第一發光單元包括位於第一發光區域及第二發光區域中的第一發光層,第二發光單元包括位於第一發光區域及第二發光區域中的第二發光層,且第一發光單元與第二發光單元中的至少一者包括位於第一發光區域或第二發光區域中的至少一圖案化發光層,藉此使得在設計第一發光層及第二發光層時可以不用考量到圖案化發光層的發光效率,進而得以有效地優化由第一發光層及第二發光層所發射出的色光,以提升該色光的發光效率。如此一來,白光發光元件可解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。Based on the above, the white light emitting element of the present invention includes a first light emitting unit, a second light emitting unit, and a connection layer connecting the first light emitting unit and the second light emitting unit, wherein the first light emitting unit includes a first light emitting region and a second light emitting region. The first light-emitting layer and the second light-emitting unit include a second light-emitting layer located in the first light-emitting region and the second light-emitting region, and at least one of the first light-emitting unit and the second light-emitting unit includes a first light-emitting region. Or at least one patterned light-emitting layer in the second light-emitting region, so that the light-emitting efficiency of the patterned light-emitting layer can be avoided when designing the first light-emitting layer and the second light-emitting layer, thereby effectively optimizing the light emission from the first light-emitting layer. Colored light emitted from the layer and the second light emitting layer to improve the luminous efficiency of the colored light. In this way, the white light emitting element can solve the problems of light color change and poor reliability after long-term operation of the conventional stacked white light element.

為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施方式,並配合所附圖式作詳細說明如下。In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

圖1是依照本發明的第一實施方式的白光發光元件的剖面示意圖。請參照圖1,白光發光元件10包括第一發光單元U1、第二發光單元U2以及連接層R,其中第一發光單元U1包括第一電極層120、第一發光層160以及第一圖案化發光層162,第二發光單元U2包括第二電極層290、第二發光層260以及第二圖案化發光層262。另外,在本實施方式中,白光發光元件10更可包括基板100、元件層110、電洞注入層(hole injection layer,HIL)130、電洞傳輸層(hole transport layer,HTL)140、電洞傳輸層150、電子傳輸層(electron transport layer,ETL)170、電子注入層(electron injection layer,EIL)180、電洞注入層230、電洞傳輸層240、電洞傳輸層250、電子傳輸層270、電子注入層280,其中第一發光單元U1包括電洞注入層130、電洞傳輸層140、電洞傳輸層150、電子傳輸層170、電子注入層180,而第二發光單元U2包括電洞注入層230、電洞傳輸層240、電洞傳輸層250、電子傳輸層270、電子注入層280。以下,將對上述各構件進行詳細說明。FIG. 1 is a schematic cross-sectional view of a white light emitting element according to a first embodiment of the present invention. Referring to FIG. 1, the white light emitting element 10 includes a first light emitting unit U1, a second light emitting unit U2, and a connection layer R. The first light emitting unit U1 includes a first electrode layer 120, a first light emitting layer 160, and a first patterned light emission. The layer 162 and the second light-emitting unit U2 include a second electrode layer 290, a second light-emitting layer 260, and a second patterned light-emitting layer 262. In addition, in this embodiment, the white light emitting element 10 may further include a substrate 100, an element layer 110, a hole injection layer (HIL) 130, a hole transport layer (HTL) 140, and a hole Transmission layer 150, electron transport layer (ETL) 170, electron injection layer (EIL) 180, hole injection layer 230, hole transmission layer 240, hole transmission layer 250, electron transmission layer 270 And an electron injection layer 280, wherein the first light emitting unit U1 includes a hole injection layer 130, a hole transmission layer 140, a hole transmission layer 150, an electron transmission layer 170, and an electron injection layer 180, and the second light emitting unit U2 includes a hole The injection layer 230, the hole transport layer 240, the hole transport layer 250, the electron transport layer 270, and the electron injection layer 280. Hereinafter, each of the above-mentioned members will be described in detail.

基板100具有第一發光區域A及第二發光區域B。在本實施方式中,第一發光區域A及第二發光區域B分別用於顯示不同顏色的色光。在本實施方式中,第一發光區域A及第二發光區域B可以並列(side by side)方式排列,亦即第一發光區域A與第二發光區域B相鄰設置,但不以此為限。另外,在本實施方式中,基板100的材質例如是玻璃、石英、有機聚合物或是金屬等等。The substrate 100 includes a first light-emitting area A and a second light-emitting area B. In this embodiment, the first light emitting area A and the second light emitting area B are respectively used to display colored light of different colors. In this embodiment, the first light-emitting area A and the second light-emitting area B may be arranged side by side, that is, the first light-emitting area A and the second light-emitting area B are arranged adjacent to each other, but not limited thereto. . In addition, in this embodiment, the material of the substrate 100 is, for example, glass, quartz, organic polymer, or metal.

元件層110配置於基板100上。在本實施方式中,元件層110可以是任何所屬領域中具有通常知識者所周知的任一種主動元件層。具體而言,在本實施方式中,元件層110可包括多個薄膜電晶體(thin film transistor,TFT)、電容器等驅動元件,然本發明不限於此。The element layer 110 is disposed on the substrate 100. In this embodiment, the element layer 110 may be any type of active element layer known to those having ordinary knowledge in the art. Specifically, in the present embodiment, the element layer 110 may include a plurality of driving elements such as thin film transistors (TFTs) and capacitors, but the present invention is not limited thereto.

第一電極層120配置於基板100上。詳細而言,在本實施方式中,第一電極層120包括彼此分離的電極圖案120a及電極圖案120b,其中電極圖案120a位於第一發光區域A中,電極圖案120b位於第二發光區域B中。也就是說,在本實施方式中,第一電極層120為經圖案化的電極層,且第一電極層120位於第一發光區域A及第二發光區域B中。The first electrode layer 120 is disposed on the substrate 100. In detail, in this embodiment, the first electrode layer 120 includes an electrode pattern 120a and an electrode pattern 120b separated from each other, wherein the electrode pattern 120a is located in the first light-emitting area A and the electrode pattern 120b is located in the second light-emitting area B. That is, in this embodiment, the first electrode layer 120 is a patterned electrode layer, and the first electrode layer 120 is located in the first light-emitting area A and the second light-emitting area B.

在本實施方式中,第一電極層120可利用任何所屬領域中具有通常知識者所周知的任一種製造電極層的方法來形成。舉例而言,在一實施方式中,形成第一電極層120的方法包括以下步驟:使用化學氣相沉積(chemical vapor deposition,CVD)製程或物理氣相沉積(physical vapor deposition,PVD)製程於基板100上形成電極材料層,並接著使用微影蝕刻(lithography etching)製程對電極材料層進行圖案化。舉另一例而言,在一實施方式中,形成第一電極層120的方法包括進行印刷噴塗(inject printing)製程。In this embodiment, the first electrode layer 120 may be formed by any method for manufacturing an electrode layer known to those having ordinary knowledge in the art. For example, in one embodiment, the method for forming the first electrode layer 120 includes the following steps: using a chemical vapor deposition (CVD) process or a physical vapor deposition (PVD) process on the substrate An electrode material layer is formed on 100, and then the electrode material layer is patterned using a lithography etching process. For another example, in one embodiment, a method of forming the first electrode layer 120 includes performing an inject printing process.

另外,在本實施方式中,第一電極層120的材質可包括反射材料,其例如是金屬、合金、金屬氧化物等導電材質,或是金屬與透明金屬氧化物導電材料之堆疊層,上述透明金屬氧化物導電材料例如是銦錫氧化物、銦鋅氧化物、鋁錫氧化物、鋁鋅氧化物、銦鍺鋅氧化物或其它合適的氧化物。也就是說,在本實施方式中,第一電極層120為反射電極層,藉此白光發光元件10屬於上發光型(top emission type)設計。In addition, in this embodiment, the material of the first electrode layer 120 may include a reflective material, such as a conductive material such as a metal, an alloy, a metal oxide, or a stacked layer of a metal and a transparent metal oxide conductive material. The metal oxide conductive material is, for example, indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or other suitable oxides. That is, in this embodiment, the first electrode layer 120 is a reflective electrode layer, whereby the white light emitting element 10 belongs to a top emission type design.

電洞注入層130以及電洞傳輸層140依序配置在第一電極層120上。詳細而言,在本實施方式中,電洞注入層130以及電洞傳輸層140皆位於第一發光區域A及第二發光區域B中。另外,電洞注入層130與電洞傳輸層140的形成方法例如包括進行蒸鍍製程或噴墨製程。電洞注入層130的材質例如包括苯二甲藍銅、星狀芳胺類、聚苯胺、聚乙烯二氧噻吩或其他合適的材料。電洞傳輸層140的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件10包括電洞注入層130以及電洞傳輸層140,但本發明並不限於此。在其他實施方式中,白光發光元件10可以僅包括電洞注入層130或電洞傳輸層140,或者白光發光元件10亦可不包括電洞注入層130以及電洞傳輸層140。也就是說,電洞注入層130以及電洞傳輸層140的配置是可選的。The hole injection layer 130 and the hole transmission layer 140 are sequentially disposed on the first electrode layer 120. In detail, in this embodiment, the hole injection layer 130 and the hole transmission layer 140 are both located in the first light-emitting area A and the second light-emitting area B. The method of forming the hole injection layer 130 and the hole transport layer 140 includes, for example, performing a vapor deposition process or an inkjet process. The material of the hole injection layer 130 includes, for example, xylylene blue copper, star-shaped aromatic amines, polyaniline, polyethylene dioxythiophene, or other suitable materials. The material of the hole transport layer 140 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 10 includes a hole injection layer 130 and a hole transmission layer 140, but the present invention is not limited thereto. In other embodiments, the white light emitting element 10 may include only the hole injection layer 130 or the hole transmission layer 140, or the white light emitting element 10 may not include the hole injection layer 130 and the hole transmission layer 140. That is, the configurations of the hole injection layer 130 and the hole transmission layer 140 are optional.

電洞傳輸層150配置於第一電極層120與第一圖案化發光層162之間,用以滿足第一圖案化發光層162所發出的光的光學厚度。詳細而言,在本實施方式中,電洞傳輸層150位於第一發光區域A中。也就是說,電洞傳輸層150為經圖案化的電洞傳輸層。電洞傳輸層150例如是利用蒸鍍製程並搭配精細金屬罩幕(fine metal mask,FMM)或噴墨製程來形成。電洞傳輸層150的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料,且可與電洞傳輸層140相同或不同。The hole transmission layer 150 is disposed between the first electrode layer 120 and the first patterned light-emitting layer 162 to satisfy the optical thickness of light emitted by the first patterned light-emitting layer 162. In detail, in the present embodiment, the hole transmission layer 150 is located in the first light emitting region A. That is, the hole transmission layer 150 is a patterned hole transmission layer. The hole transport layer 150 is formed by, for example, an evaporation process and a fine metal mask (FMM) or an inkjet process. The material of the hole transport layer 150 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials, and may be the same as or different from the hole transport layer 140.

第一圖案化發光層162配置於第一電極層120與第一發光層160之間。詳細而言,在本實施方式中,第一圖案化發光層162位於第一發光區域A中且不位於第二發光區域B中。在本實施方式中,第一圖案化發光層162例如是使用蒸鍍製程並搭配對應的FMM或噴墨製程來形成。另外,在本實施方式中,第一圖案化發光層162為紅色發光層。也就是說,在本實施方式中,第一圖案化發光層162包括紅色發光材料。The first patterned light emitting layer 162 is disposed between the first electrode layer 120 and the first light emitting layer 160. In detail, in this embodiment, the first patterned light-emitting layer 162 is located in the first light-emitting area A and is not located in the second light-emitting area B. In this embodiment, the first patterned light-emitting layer 162 is formed using, for example, an evaporation process and a corresponding FMM or inkjet process. In addition, in this embodiment, the first patterned light emitting layer 162 is a red light emitting layer. That is, in this embodiment, the first patterned light emitting layer 162 includes a red light emitting material.

第一發光層160配置在第一電極層120上。詳細而言,在本實施方式中,第一發光層160位在第一發光區域A及第二發光區域B中。更詳細而言,在本實施方式中,在第一發光區域A中,第一發光層160覆蓋第一圖案化發光層162。從另一觀點而言,在本實施方式中,第一圖案化發光層162僅位於第一發光區域A中,而第一發光層160為一連續結構層,連續分佈於第一發光區域A及第二發光區域B中。值得一提的是,在本實施方式中,由於第一發光層160為一連續結構層,因此第一發光層160不需使用FMM加以形成。詳細而言,在本實施方式中,第一發光層160例如是使用蒸鍍製程或噴墨製程並搭配一般金屬遮罩來形成。The first light emitting layer 160 is disposed on the first electrode layer 120. Specifically, in this embodiment, the first light emitting layer 160 is located in the first light emitting area A and the second light emitting area B. In more detail, in this embodiment, in the first light emitting area A, the first light emitting layer 160 covers the first patterned light emitting layer 162. From another perspective, in this embodiment, the first patterned light-emitting layer 162 is located only in the first light-emitting area A, and the first light-emitting layer 160 is a continuous structure layer continuously distributed in the first light-emitting area A and In the second light-emitting area B. It is worth mentioning that, in this embodiment, since the first light emitting layer 160 is a continuous structure layer, the first light emitting layer 160 does not need to be formed using FMM. In detail, in this embodiment, the first light-emitting layer 160 is formed by using, for example, a vapor deposition process or an inkjet process and a general metal mask.

另外,在本實施方式中,第一發光層160為藍色發光層。也就是說,在本實施方式中,第一發光層160包括藍色發光材料。從另一觀點而言,在本實施方式中,第一發光層160為藍光共通層(blue common layer,BCL)。值得一提的是,在本實施方式中,第一發光層160需選用電子遷移率(mobility)較快的材料,以使得在第一發光層160覆蓋第一圖案化發光層162之第一發光區域A中,電子與電洞容易於第一圖案化發光層162中結合而發光。也就是說,本實施方式中,位於第一發光區域A中的第一發光層160作用為電子傳輸層。另一方面,在本實施方式中,透過微共振腔效應可優化位於第二發光區域B中的第一發光層160所發的光。In addition, in this embodiment, the first light emitting layer 160 is a blue light emitting layer. That is, in this embodiment, the first light emitting layer 160 includes a blue light emitting material. From another perspective, in this embodiment, the first light emitting layer 160 is a blue common layer (BCL). It is worth mentioning that, in this embodiment, the first light-emitting layer 160 needs to use a material having a fast electron mobility, so that the first light-emitting layer 160 covers the first light-emitting of the first patterned light-emitting layer 162. In the region A, electrons and holes are easily combined in the first patterned light emitting layer 162 to emit light. That is, in this embodiment, the first light emitting layer 160 located in the first light emitting region A functions as an electron transporting layer. On the other hand, in this embodiment, the light emitted by the first light-emitting layer 160 located in the second light-emitting region B can be optimized through the micro-cavity effect.

電子傳輸層170以及電子注入層180依序配置在第一發光層160上。詳細而言,在本實施方式中,電子注入層170以及電子傳輸層180皆位於第一發光區域A及第二發光區域B中。另外,電子傳輸層170以及電子注入層180的形成方法例如包括進行蒸鍍製程或噴墨製程。電子傳輸層170的材質例如包括噁唑衍生物及其樹狀物、金屬螯合物、唑類化合物、二氮蒽衍生物、含矽雜環化合物或其他合適的材料。電子注入層180的材質例如包括氧化鋰、氧化鋰硼、矽氧化鉀、碳酸銫、醋酸鈉、氟化鋰鹼或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件10包括電子傳輸層170以及電子注入層180,但本發明並不限於此。在其他實施方式中,白光發光元件10可以僅包括電子傳輸層170或電子注入層180,或者白光發光元件10亦可不包括電子傳輸層170以及電子注入層180。也就是說,電子傳輸層170以及電子注入層180的配置是可選的。The electron transport layer 170 and the electron injection layer 180 are sequentially disposed on the first light emitting layer 160. In detail, in this embodiment, the electron injection layer 170 and the electron transport layer 180 are both located in the first light-emitting area A and the second light-emitting area B. The method of forming the electron transport layer 170 and the electron injection layer 180 includes, for example, performing a vapor deposition process or an inkjet process. The material of the electron transporting layer 170 includes, for example, an oxazole derivative and a dendrimer thereof, a metal chelate compound, an azole compound, a diazaanthracene derivative, a silicon-containing heterocyclic compound, or other suitable materials. The material of the electron injection layer 180 includes, for example, lithium oxide, lithium boron oxide, potassium silicon oxide, cesium carbonate, sodium acetate, lithium fluoride base, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 10 includes an electron transport layer 170 and an electron injection layer 180, but the present invention is not limited thereto. In other embodiments, the white light emitting element 10 may include only the electron transport layer 170 or the electron injection layer 180, or the white light emitting element 10 may not include the electron transport layer 170 and the electron injection layer 180. That is, the configurations of the electron transport layer 170 and the electron injection layer 180 are optional.

連接層R位於第一發光單元U1以及第二發光單元U2之間,用以使第一發光單元U1與第二發光單元U2串聯在一起。在本實施方式中,連接層R包括導電材料,其例如是氧化鉬(Molybdenum trioxide,MoO 3)、氧化鎢(Tungsten trioxide,WO 3)、鋰或銫。 The connection layer R is located between the first light-emitting unit U1 and the second light-emitting unit U2, and is used for connecting the first light-emitting unit U1 and the second light-emitting unit U2 in series. In this embodiment, the connection layer R includes a conductive material, such as molybdenum trioxide (MoO 3 ), tungsten oxide (Tungsten trioxide, WO 3 ), lithium, or cesium.

電洞注入層230以及電洞傳輸層240依序配置在連接層R上。詳細而言,在本實施方式中,電洞注入層230以及電洞傳輸層240皆位於第一發光區域A及第二發光區域B中。另外,電洞注入層230以及電洞傳輸層240的形成方法例如包括進行蒸鍍製程或噴墨製程。電洞注入層230的材質例如包括苯二甲藍銅、星狀芳胺類、聚苯胺、聚乙烯二氧噻吩或其他合適的材料。電洞傳輸層240的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件10包括電洞注入層230以及電洞傳輸層240,但本發明並不限於此。在其他實施方式中,白光發光元件10可以僅包括電洞注入層230或電洞傳輸層240,或者白光發光元件10亦可不包括電洞注入層230以及電洞傳輸層240。也就是說,電洞注入層230以及電洞傳輸層240的配置是可選的。The hole injection layer 230 and the hole transmission layer 240 are sequentially disposed on the connection layer R. In detail, in this embodiment, the hole injection layer 230 and the hole transmission layer 240 are both located in the first light-emitting area A and the second light-emitting area B. The method of forming the hole injection layer 230 and the hole transmission layer 240 includes, for example, performing a vapor deposition process or an inkjet process. The material of the hole injection layer 230 includes, for example, xylylene blue copper, star-shaped aromatic amines, polyaniline, polyethylene dioxythiophene, or other suitable materials. The material of the hole transport layer 240 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 10 includes a hole injection layer 230 and a hole transmission layer 240, but the present invention is not limited thereto. In other embodiments, the white light emitting element 10 may include only the hole injection layer 230 or the hole transmission layer 240, or the white light emitting element 10 may not include the hole injection layer 230 and the hole transmission layer 240. That is, the configurations of the hole injection layer 230 and the hole transmission layer 240 are optional.

電洞傳輸層250配置於連接層R與第二圖案化發光層262之間,用以滿足第二圖案化發光層262所發出的光的光學厚度。詳細而言,在本實施方式中,電洞傳輸層250位於第一發光區域A中。也就是說,電洞傳輸層250為經圖案化的電洞傳輸層。電洞傳輸層250例如是利用蒸鍍製程並搭配FMM或噴墨製程來形成。電洞傳輸層250的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料,且可與電洞傳輸層240相同或不同。The hole transmission layer 250 is disposed between the connection layer R and the second patterned light-emitting layer 262 to satisfy the optical thickness of the light emitted by the second patterned light-emitting layer 262. In detail, in the present embodiment, the hole transport layer 250 is located in the first light emitting region A. That is, the hole transmission layer 250 is a patterned hole transmission layer. The hole transport layer 250 is formed by, for example, a vapor deposition process and an FMM or inkjet process. The material of the hole transport layer 250 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials, and may be the same as or different from the hole transport layer 240.

第二圖案化發光層262配置於連接層R與第二發光層260之間。詳細而言,在本實施方式中,第二圖案化發光層262位於第一發光區域A中且不位於第二發光區域B中。在本實施方式中,第二圖案化發光層262例如是使用蒸鍍製程並搭配對應的FMM或噴墨製程來形成。另外,在本實施方式中,第二圖案化發光層262為綠色發光層。也就是說,在本實施方式中,第二圖案化發光層262包括綠色發光材料。The second patterned light emitting layer 262 is disposed between the connection layer R and the second light emitting layer 260. In detail, in this embodiment, the second patterned light-emitting layer 262 is located in the first light-emitting area A and is not located in the second light-emitting area B. In this embodiment, the second patterned light-emitting layer 262 is formed using, for example, an evaporation process and a corresponding FMM or inkjet process. In this embodiment, the second patterned light-emitting layer 262 is a green light-emitting layer. That is, in this embodiment, the second patterned light emitting layer 262 includes a green light emitting material.

第二發光層260配置在連接層R上。詳細而言,在本實施方式中,第二發光層260位在第一發光區域A及第二發光區域B中。更詳細而言,在本實施方式中,在第一發光區域A中,第二發光層260覆蓋第二圖案化發光層262。從另一觀點而言,在本實施方式中,第二圖案化發光層262僅位於第一發光區域A中,而第二發光層260為一連續結構層,連續分佈於第一發光區域A及第二發光區域B中。值得一提的是,在本實施方式中,由於第二發光層260為一連續結構層,因此第二發光層260不需使用FMM加以形成。詳細而言,在本實施方式中,第二發光層260例如是使用蒸鍍製程或噴墨製程並搭配一般金屬遮罩來形成。The second light emitting layer 260 is disposed on the connection layer R. Specifically, in this embodiment, the second light-emitting layer 260 is located in the first light-emitting area A and the second light-emitting area B. In more detail, in this embodiment, in the first light-emitting area A, the second light-emitting layer 260 covers the second patterned light-emitting layer 262. From another perspective, in this embodiment, the second patterned light-emitting layer 262 is located only in the first light-emitting area A, and the second light-emitting layer 260 is a continuous structure layer continuously distributed in the first light-emitting areas A and In the second light-emitting area B. It is worth mentioning that, in this embodiment, since the second light emitting layer 260 is a continuous structure layer, the second light emitting layer 260 does not need to be formed using FMM. In detail, in the present embodiment, the second light-emitting layer 260 is formed using, for example, a vapor deposition process or an inkjet process and a common metal mask.

另外,在本實施方式中,第二發光層260為藍色發光層。也就是說,在本實施方式中,第二發光層260包括藍色發光材料。從另一觀點而言,在本實施方式中,第二發光層260為藍光共通層。從又一觀點而言,在本實施方式中,第一發光層160及第二發光層260可發出相同顏色的色光。值得一提的是,在本實施方式中,第二發光層260需選用電子遷移率較快的材料,以使得在第二發光層260覆蓋第二圖案化發光層262之第一發光區域A中,電子與電洞容易於第二圖案化發光層262中結合而發光。也就是說,本實施方式中,位於第一發光區域A中的第二發光層260作用為電子傳輸層。另一方面,在本實施方式中,透過微共振腔效應可優化位於第二發光區域B中的第二發光層260所發的光。In this embodiment, the second light-emitting layer 260 is a blue light-emitting layer. That is, in this embodiment, the second light emitting layer 260 includes a blue light emitting material. From another perspective, in this embodiment, the second light emitting layer 260 is a blue light common layer. From another point of view, in this embodiment, the first light emitting layer 160 and the second light emitting layer 260 can emit colored light of the same color. It is worth mentioning that in this embodiment, the second light-emitting layer 260 needs to be selected from a material having a fast electron mobility so that the second light-emitting layer 260 covers the first light-emitting area A of the second patterned light-emitting layer 262. Electrons and holes are easily combined in the second patterned light-emitting layer 262 to emit light. That is, in this embodiment, the second light-emitting layer 260 located in the first light-emitting region A functions as an electron transporting layer. On the other hand, in this embodiment, the light emitted by the second light-emitting layer 260 located in the second light-emitting region B can be optimized through the micro-cavity effect.

電子傳輸層270以及電子注入層280依序配置在第二發光層260上。詳細而言,在本實施方式中,電子注入層270以及電子傳輸層280皆位於第一發光區域A及第二發光區域B中。另外,電子傳輸層270以及電子注入層280的形成方法例如包括進行蒸鍍製程或噴墨製程。電子傳輸層270的材質例如包括噁唑衍生物及其樹狀物、金屬螯合物、唑類化合物、二氮蒽衍生物、含矽雜環化合物或其他合適的材料。電子注入層280的材質例如包括氧化鋰、氧化鋰硼、矽氧化鉀、碳酸銫、醋酸鈉、氟化鋰鹼或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件10包括電子傳輸層270以及電子注入層280,但本發明並不限於此。在其他實施方式中,白光發光元件10可以僅包括電子傳輸層270或電子注入層280,或者白光發光元件10亦可不包括電子傳輸層270以及電子注入層280。也就是說,電子傳輸層270以及電子注入層280的配置是可選的。The electron transport layer 270 and the electron injection layer 280 are sequentially disposed on the second light emitting layer 260. In detail, in this embodiment, the electron injection layer 270 and the electron transport layer 280 are both located in the first light emitting area A and the second light emitting area B. The method of forming the electron transport layer 270 and the electron injection layer 280 includes, for example, performing a vapor deposition process or an inkjet process. The material of the electron transport layer 270 includes, for example, an oxazole derivative and its dendrimer, a metal chelate compound, an azole compound, a diazanthrene derivative, a silicon-containing heterocyclic compound, or other suitable materials. The material of the electron injection layer 280 includes, for example, lithium oxide, lithium boron oxide, potassium silicon oxide, cesium carbonate, sodium acetate, lithium fluoride base, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 10 includes an electron transport layer 270 and an electron injection layer 280, but the present invention is not limited thereto. In other embodiments, the white light emitting element 10 may include only the electron transporting layer 270 or the electron injection layer 280, or the white light emitting element 10 may not include the electron transporting layer 270 and the electron injection layer 280. That is, the configurations of the electron transport layer 270 and the electron injection layer 280 are optional.

第二電極層290配置於第二發光層260上。詳細而言,在本實施方式中,第二電極層290位於第一發光區域A及第二發光區域B中。在本實施方式中,第二電極層290的材質例如包括透明金屬氧化物導電材料,其例如是銦錫氧化物、銦鋅氧化物、鋁錫氧化物、鋁鋅氧化物、銦鍺鋅氧化物或其它合適的氧化物;金屬;或是上述所列至少二者之堆疊層。也就是說,在本實施方式中,第二電極層290可以為透明電極層或者半穿透半反射電極層。The second electrode layer 290 is disposed on the second light-emitting layer 260. Specifically, in the present embodiment, the second electrode layer 290 is located in the first light-emitting area A and the second light-emitting area B. In this embodiment, the material of the second electrode layer 290 includes, for example, a transparent metal oxide conductive material, which is, for example, indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide. Or other suitable oxides; metals; or stacked layers of at least two of the above. That is, in this embodiment, the second electrode layer 290 may be a transparent electrode layer or a semi-transmissive and semi-reflective electrode layer.

另外,在本實施方式中,第一電極層120作為陽極,而第二電極層290作為陰極。但必需說明的,就以設計上的需求來說,第一電極層120也可能作為陰極,而第二電極層290則作為陽極。進一步而言,白光發光元件10是透過第一電極層120與第二電極層290間產生電壓差來驅動第一發光層160、第一圖案化發光層162、第二發光層260以及第二圖案化發光層262發光。In addition, in this embodiment, the first electrode layer 120 functions as an anode, and the second electrode layer 290 functions as a cathode. However, it must be noted that, in terms of design requirements, the first electrode layer 120 may also serve as a cathode, and the second electrode layer 290 may serve as an anode. Further, the white light emitting element 10 drives the first light emitting layer 160, the first patterned light emitting layer 162, the second light emitting layer 260, and the second pattern through a voltage difference between the first electrode layer 120 and the second electrode layer 290. The chemiluminescent layer 262 emits light.

值得一提的是,在白光發光元件10中,於第一發光區域A中的第一電極層120與第二電極層290之間、第二發光區域B的第一電極層120與第二電極層290之間分別可形成微共振腔(micro cavity),藉此使得由第一發光層160、第一圖案化發光層162、第二發光層260以及第二圖案化發光層262所分別發出的色光可於對應的微共振腔中產生微共振腔效應,進而使第一發光區域A及第二發光區域B分別顯示出第一色光IA及第二色光IB。It is worth mentioning that, in the white light emitting element 10, between the first electrode layer 120 and the second electrode layer 290 in the first light emitting area A, and the first electrode layer 120 and the second electrode in the second light emitting area B Micro cavities may be formed between the layers 290, respectively, so that the light emitted by the first light emitting layer 160, the first patterned light emitting layer 162, the second light emitting layer 260, and the second patterned light emitting layer 262, respectively. The colored light can generate a micro-cavity effect in the corresponding micro-resonance cavity, so that the first light-emitting area A and the second light-emitting area B respectively display the first color light IA and the second color light IB.

詳細而言,第一圖案化發光層162與第二圖案化發光層262所發出的色光會混合成第一色光IA而從第一發光區域A射出,且第一發光層160及第二發光層260所發出的色光會混合成第二色光IB而從第二發光區域B射出。具體而言,在本實施方式中,第一色光IA為黃光,第二色光IB為藍光。如此一來,當白光發光元件10應用於照明時,第一色光IA與第二色光IB會混合成白光;而當白光發光元件10應用於顯示器時,可於第一發光區域A中設置紅色濾光層及綠色濾光層以獲得紅光與綠光,而無須設置任何藍色濾光層。In detail, the color light emitted from the first patterned light-emitting layer 162 and the second patterned light-emitting layer 262 is mixed into a first color light IA and emitted from the first light-emitting area A, and the first light-emitting layer 160 and the second light-emitting The colored light emitted from the layer 260 is mixed into the second colored light IB and emitted from the second light emitting area B. Specifically, in this embodiment, the first color light IA is yellow light, and the second color light IB is blue light. In this way, when the white light emitting element 10 is applied to lighting, the first color light IA and the second color light IB are mixed into white light; and when the white light emitting element 10 is applied to a display, red may be set in the first light emitting area A. The filter layer and the green filter layer can obtain red light and green light without any blue filter layer.

從另一觀點而言,在本實施方式中,第一圖案化發光層162與第二圖案化發光層262位於第一發光區域A中,藉此使得連續分佈於第一發光區域A及第二發光區域B中的第一發光層160及第二發光層260在設計時可以不用考量第一圖案化發光層162與第一圖案化發光層262的發光效率,進而得以有效地優化由位於第二發光區域B中的第一發光層160及第二發光層260發出的色光所混合而成的第二色光IB,以提升第二色光IB的發光效率。From another point of view, in this embodiment, the first patterned light-emitting layer 162 and the second patterned light-emitting layer 262 are located in the first light-emitting area A, so that they are continuously distributed in the first light-emitting area A and the second The first light emitting layer 160 and the second light emitting layer 260 in the light emitting area B can be designed without considering the light emitting efficiency of the first patterned light emitting layer 162 and the first patterned light emitting layer 262, and can be effectively optimized by The second color light IB is obtained by mixing the color light emitted from the first light emitting layer 160 and the second light emitting layer 260 in the light emitting area B to improve the light emitting efficiency of the second color light IB.

進一步而言,在本實施方式中,由於由位於第二發光區域B中的兩個發光層(即第一發光層160及第二發光層260)發出的色光所混合而成的第二色光IB可被優化並且第一發光層160及第二發光層260皆為藍色發光層,故與將藍色發光二極體元件和紅-綠色發光二極體元件堆疊在一起的習知堆疊式白光元件相比,白光發光元件10的藍光效率較高。有鑑於此,與所述習知堆疊式白光元件相比,白光發光元件10能夠以較低的操作電流來獲得相當亮度的藍光,因而有效延長第一發光層160與第二發光層260的使用壽命,解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。另一方面,如前文所述,白光發光元件10應用於顯示器時無須設置任何藍色濾光層,藉此得以維持白光發光元件10的藍光效率。Further, in this embodiment, the second color light IB is obtained by mixing color light emitted from two light emitting layers (ie, the first light emitting layer 160 and the second light emitting layer 260) located in the second light emitting area B. Can be optimized and the first light-emitting layer 160 and the second light-emitting layer 260 are blue light-emitting layers, so it is in accordance with the conventional stacked white light that stacks blue light-emitting diode elements and red-green light-emitting diode elements together. Compared with the device, the white light emitting device 10 has a higher blue light efficiency. In view of this, compared with the conventional stacked white light element, the white light emitting element 10 can obtain a relatively bright blue light with a lower operating current, thereby effectively extending the use of the first light emitting layer 160 and the second light emitting layer 260. Service life, solving the problem of light color change and poor reliability after long operation of the conventional stacked white light element. On the other hand, as described above, when the white light emitting element 10 is applied to a display, it is not necessary to provide any blue filter layer, thereby maintaining the blue light efficiency of the white light emitting element 10.

進一步,藉由模擬發光實驗可證實,本發明的白光發光元件10具有良好的藍光效率。圖2是圖1的白光發光元件與習知堆疊式白光元件所發出光的波長與強度的關係圖。詳細而言,模擬實驗中所使用的習知堆疊式白光元件即為將藍色發光二極體元件和紅-綠色發光二極體元件堆疊在一起的習知堆疊式白光元件。由圖2可知,與習知堆疊式白光元件相比,本發明的白光發光元件10能夠發出強度較強的藍光。Further, it can be confirmed by the simulation light emission experiment that the white light emitting element 10 of the present invention has good blue light efficiency. FIG. 2 is a graph showing the relationship between the wavelength and the intensity of light emitted by the white light emitting element of FIG. 1 and the conventional stacked white light element. In detail, the conventional stacked white light element used in the simulation experiment is a conventional stacked white light element in which a blue light emitting diode element and a red-green light emitting diode element are stacked together. As can be seen from FIG. 2, compared with the conventional stacked white light element, the white light emitting element 10 of the present invention can emit blue light having a stronger intensity.

基於第一實施方式可知,透過第一發光單元U1包括位於第一發光區域A及第二發光區域B中的第一發光層160及位於第一發光區域A中的第一圖案化發光層162,以及第二發光單元U2包括位於第一發光區域A及第二發光區域B中的第二發光層260及位於第一發光區域A中的第二圖案化發光層262,藉此使得在設計第一發光層160及第二發光層260時可以不用考量到第一圖案化發光層162與第二圖案化發光層262的發光效率,進而得以有效地優化第二色光IB,以提升第二色光IB的發光效率。如此一來,白光發光元件10可解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。Based on the first embodiment, it is known that the first light-emitting unit U1 includes a first light-emitting layer 160 located in the first light-emitting area A and the second light-emitting area B, and a first patterned light-emitting layer 162 located in the first light-emitting area A. And the second light-emitting unit U2 includes a second light-emitting layer 260 located in the first light-emitting area A and the second light-emitting area B, and a second patterned light-emitting layer 262 located in the first light-emitting area A, so that in designing the first The light-emitting layer 160 and the second light-emitting layer 260 can be used without considering the luminous efficiency of the first patterned light-emitting layer 162 and the second patterned light-emitting layer 262, thereby effectively optimizing the second color light IB to improve the second color light IB. Luminous efficiency. In this way, the white light emitting element 10 can solve the problems of light color change and poor reliability after long-term operation of the conventional stacked white light element.

另外,雖然在第一實施方式中,第一發光單元U1包括位於第一發光區域A中的第一圖案化發光層162,且第二發光單元U2包括位於第一發光區域A中的第二圖案化發光層262,但本發明並不限於此。詳細而言,只要第一發光單元U1與第二發光單元U2中的至少一者包括位於第一發光區域A或第二發光區域B中的至少一個圖案化發光層即落入本發明的範疇內。也就是說,在其他實施方式中,第一發光單元U1可以包括位於第一發光區域A中的兩個圖案化發光層;或者在其他實施方式中,第一發光單元U1可以包括位於第一發光區域A中的一個圖案化發光層,而第二發光單元U2可以包括位於第二發光區域B中的一個圖案化發光層。In addition, although in the first embodiment, the first light emitting unit U1 includes a first patterned light emitting layer 162 located in the first light emitting area A, and the second light emitting unit U2 includes a second pattern located in the first light emitting area A The light-emitting layer 262 is not limited thereto. In detail, as long as at least one of the first light emitting unit U1 and the second light emitting unit U2 includes at least one patterned light emitting layer located in the first light emitting area A or the second light emitting area B, it falls within the scope of the present invention. . That is, in other embodiments, the first light-emitting unit U1 may include two patterned light-emitting layers located in the first light-emitting region A; or in other embodiments, the first light-emitting unit U1 may include first light-emitting units U1 One patterned light emitting layer in the region A, and the second light emitting unit U2 may include one patterned light emitting layer in the second light emitting region B.

另外,雖然在第一實施方式中,白光發光元件10僅包括第一發光區域A及第二發光區域B,但本發明並不限於此。在其他實施方式中,白光發光元件也可以是至少包括第一發光區域A及第二發光區域B。In addition, although the white light emitting element 10 includes only the first light emitting area A and the second light emitting area B in the first embodiment, the present invention is not limited to this. In other embodiments, the white light emitting element may include at least a first light emitting region A and a second light emitting region B.

以下,將參照圖3~圖6針對其他的實施型態進行說明。在此必須說明的是,下述實施方式沿用了前述實施方式的元件符號與部分內容,其中採用相同或相似的符號來表示相同或相似的元件,並且省略了相同技術內容的說明。關於省略部分的說明可參照前述實施方式,下述實施方式不再重複贅述。Hereinafter, other embodiments will be described with reference to FIGS. 3 to 6. It must be noted here that the following embodiments inherit the component symbols and parts of the foregoing embodiments, in which the same or similar symbols are used to represent the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiment, and the following embodiments are not repeatedly described.

圖3是依照本發明的第二實施方式的白光發光元件的剖面示意圖。請同時參照圖3及圖1,第二實施方式的白光發光元件30與第一實施方式的白光發光元件10相似,差異主要在於:在白光發光元件30中,第一發光單元U1包括兩個圖案化發光層,且第二發光單元U2不包括任何圖案化發光層及經圖案化的電洞傳輸層;而在白光發光元件10中,第一發光單元U1及第二發光單元U2分別包括一個圖案化發光層,且第二發光單元U2包括經圖案化的電洞傳輸層。有鑑於此,在第二實施方式中,基板300、元件層310、第一電極層320、電極圖案320a~320b、電洞注入層330、電洞傳輸層340、第一圖案化發光層362、電子傳輸層370、電子注入層380、電洞注入層430、電洞傳輸層440、電子傳輸層470、電子注入層480及第二電極層490可與前述第一實施方式中之對應者相同或相似,故相關說明即不再贅述。以下,將針對兩者之間的差異處進行說明。3 is a schematic cross-sectional view of a white light emitting element according to a second embodiment of the present invention. Please refer to FIG. 3 and FIG. 1 at the same time. The white light emitting element 30 of the second embodiment is similar to the white light emitting element 10 of the first embodiment, and the difference is mainly that in the white light emitting element 30, the first light emitting unit U1 includes two patterns Light emitting layer, and the second light emitting unit U2 does not include any patterned light emitting layer and patterned hole transport layer; and in the white light emitting element 10, the first light emitting unit U1 and the second light emitting unit U2 each include a pattern The light emitting layer is patterned, and the second light emitting unit U2 includes a patterned hole transport layer. In view of this, in the second embodiment, the substrate 300, the element layer 310, the first electrode layer 320, the electrode patterns 320a to 320b, the hole injection layer 330, the hole transmission layer 340, the first patterned light emitting layer 362, The electron transport layer 370, the electron injection layer 380, the hole injection layer 430, the hole transmission layer 440, the electron transmission layer 470, the electron injection layer 480, and the second electrode layer 490 may be the same as those in the foregoing first embodiment or Similar, so the relevant description will not be repeated. Hereinafter, differences between the two will be described.

請參照圖3,在本實施方式中,第一發光單元U1包括第二圖案化發光層364。詳細而言,在本實施方式中,第二圖案化發光層364配置於第一電極層320與第一發光層360之間,且第一圖案化發光層362配置於第一電極層320與第二圖案化發光層364之間。也就是說,第一圖案化發光層362、第二圖案化發光層364以及第一發光層360依序配置在第一電極層320上。另一方面,在本實施方式中,第二圖案化發光層364位於第一發光區域A中且不位於第二發光區域B中。也就是說,在本實施方式中,第一圖案化發光層362以及第二圖案化發光層364依序配置在電極圖案320a上。第二圖案化發光層364例如是使用蒸鍍製程並搭配對應的FMM或噴墨製程來形成。另外,在本實施方式中,第二圖案化發光層364為綠色發光層。也就是說,在本實施方式中,第二圖案化發光層364包括綠色發光材料。Referring to FIG. 3, in this embodiment, the first light emitting unit U1 includes a second patterned light emitting layer 364. In detail, in this embodiment, the second patterned light emitting layer 364 is disposed between the first electrode layer 320 and the first light emitting layer 360, and the first patterned light emitting layer 362 is disposed between the first electrode layer 320 and the first electrode layer 320. Between two patterned light-emitting layers 364. That is, the first patterned light emitting layer 362, the second patterned light emitting layer 364, and the first light emitting layer 360 are sequentially disposed on the first electrode layer 320. On the other hand, in this embodiment, the second patterned light-emitting layer 364 is located in the first light-emitting area A and is not located in the second light-emitting area B. That is, in this embodiment, the first patterned light emitting layer 362 and the second patterned light emitting layer 364 are sequentially disposed on the electrode pattern 320a. The second patterned light-emitting layer 364 is formed using, for example, an evaporation process and a corresponding FMM or inkjet process. In this embodiment, the second patterned light-emitting layer 364 is a green light-emitting layer. That is, in this embodiment, the second patterned light emitting layer 364 includes a green light emitting material.

在本實施方式中,第一發光單元U1包括電洞傳輸層350配置於第一電極層320與第一圖案化發光層362之間,用以滿足第一圖案化發光層362及第二圖案化發光層364所發出的光的光學厚度。詳細而言,在本實施方式中,電洞傳輸層350位於第一發光區域A中。也就是說,電洞傳輸層350為經圖案化的電洞傳輸層。電洞傳輸層350例如是利用蒸鍍製程並搭配FMM或噴墨製程來形成。電洞傳輸層350的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料,且可與電洞傳輸層340相同或不同。In this embodiment, the first light emitting unit U1 includes a hole transporting layer 350 disposed between the first electrode layer 320 and the first patterned light emitting layer 362 to satisfy the first patterned light emitting layer 362 and the second patterning. The optical thickness of the light emitted from the light emitting layer 364. In detail, in the present embodiment, the hole transport layer 350 is located in the first light emitting region A. That is, the hole transport layer 350 is a patterned hole transport layer. The hole transport layer 350 is formed by, for example, a vapor deposition process and an FMM or inkjet process. The material of the hole transport layer 350 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials, and may be the same as or different from the hole transport layer 340.

在本實施方式中,第一發光單元U1包括配置在第一電極層320上的第一發光層360。詳細而言,在本實施方式中,第一發光層360位在第一發光區域A及第二發光區域B中。更詳細而言,在本實施方式中,在第一發光區域A中,第一發光層360覆蓋第一圖案化發光層362及第二圖案化發光層364。從另一觀點而言,在本實施方式中,第一圖案化發光層362及第二圖案化發光層364都僅位於第一發光區域A中,而第一發光層360為一連續結構層,連續分佈於第一發光區域A及第二發光區域B中。值得一提的是,在本實施方式中,由於第一發光層360為一連續結構層,因此第一發光層360不需使用FMM加以形成。詳細而言,在本實施方式中,第一發光層360例如是使用蒸鍍製程或噴墨製程並搭配一般金屬遮罩來形成。In this embodiment, the first light emitting unit U1 includes a first light emitting layer 360 disposed on the first electrode layer 320. Specifically, in the present embodiment, the first light emitting layer 360 is located in the first light emitting area A and the second light emitting area B. In more detail, in this embodiment, in the first light emitting area A, the first light emitting layer 360 covers the first patterned light emitting layer 362 and the second patterned light emitting layer 364. From another point of view, in this embodiment, the first patterned light emitting layer 362 and the second patterned light emitting layer 364 are only located in the first light emitting area A, and the first light emitting layer 360 is a continuous structure layer. It is continuously distributed in the first light-emitting area A and the second light-emitting area B. It is worth mentioning that, in this embodiment, since the first light emitting layer 360 is a continuous structure layer, the first light emitting layer 360 does not need to be formed using FMM. In detail, in this embodiment, the first light-emitting layer 360 is formed by using, for example, a vapor deposition process or an inkjet process and a common metal mask.

另外,在本實施方式中,第一發光層360為藍色發光層。也就是說,在本實施方式中,第一發光層360包括藍色發光材料。從另一觀點而言,在本實施方式中,第一發光層360為藍光共通層。值得一提的是,在本實施方式中,第一發光層360需選用電子遷移率較快的材料,以使得在第一發光層360覆蓋第一圖案化發光層362及第二圖案化發光層364之第一發光區域A中,電子與電洞容易於第一圖案化發光層362及第二圖案化發光層364中結合而發光。也就是說,本實施方式中,位於第一發光區域A中的第一發光層360作用為電子傳輸層。另一方面,在本實施方式中,透過微共振腔效應可優化位於第二發光區域B中的第一發光層360所發的光。In the present embodiment, the first light emitting layer 360 is a blue light emitting layer. That is, in this embodiment, the first light emitting layer 360 includes a blue light emitting material. From another perspective, in this embodiment, the first light emitting layer 360 is a blue light common layer. It is worth mentioning that, in this embodiment, the first light-emitting layer 360 needs to be selected from a material having a fast electron mobility, so that the first light-emitting layer 360 covers the first patterned light-emitting layer 362 and the second patterned light-emitting layer. In the first light emitting area A of 364, electrons and holes are easily combined in the first patterned light emitting layer 362 and the second patterned light emitting layer 364 to emit light. That is, in this embodiment, the first light emitting layer 360 located in the first light emitting region A functions as an electron transporting layer. On the other hand, in this embodiment, the light emitted by the first light-emitting layer 360 located in the second light-emitting region B can be optimized through the micro-cavity effect.

在本實施方式中,第二發光單元U2包括配置在連接層R上的第二發光層460。詳細而言,在本實施方式中,第二發光層460位在第一發光區域A及第二發光區域B中。也就是說,在本實施方式中,第二發光層460為一連續結構層,連續分佈於第一發光區域A及第二發光區域B中。值得一提的是,在本實施方式中,由於第二發光層460為一連續結構層,因此第二發光層460不需使用FMM加以形成。詳細而言,在本實施方式中,第二發光層460例如是使用蒸鍍製程或噴墨製程並搭配一般金屬遮罩來形成。In this embodiment, the second light emitting unit U2 includes a second light emitting layer 460 disposed on the connection layer R. Specifically, in this embodiment, the second light-emitting layer 460 is located in the first light-emitting area A and the second light-emitting area B. That is, in this embodiment, the second light-emitting layer 460 is a continuous structure layer and is continuously distributed in the first light-emitting area A and the second light-emitting area B. It is worth mentioning that, in this embodiment, since the second light-emitting layer 460 is a continuous structure layer, the second light-emitting layer 460 does not need to be formed using FMM. In detail, in this embodiment, the second light-emitting layer 460 is formed using, for example, a vapor deposition process or an inkjet process and a general metal mask.

另外,在本實施方式中,第二發光層460為藍色發光層。也就是說,在本實施方式中,第二發光層460包括藍色發光材料。從另一觀點而言,在本實施方式中,第二發光層460為藍光共通層。從又一觀點而言,在本實施方式中,第一發光層360及第二發光層460可發出相同顏色的色光。值得一提的是,在本實施方式中,透過微共振腔效應,第二發光層460所發的光能夠自第一發光區域A及第二發光區域B發射至外部。In this embodiment, the second light-emitting layer 460 is a blue light-emitting layer. That is, in this embodiment, the second light emitting layer 460 includes a blue light emitting material. From another perspective, in this embodiment, the second light emitting layer 460 is a blue light common layer. From another viewpoint, in this embodiment, the first light emitting layer 360 and the second light emitting layer 460 can emit colored light of the same color. It is worth mentioning that in this embodiment, the light emitted by the second light-emitting layer 460 can be emitted from the first light-emitting area A and the second light-emitting area B to the outside through the micro-cavity effect.

基於第一實施方式可知,在本實施方式中,白光發光元件30是透過第一電極層320與第二電極層490間產生電壓差來驅動第一發光層360、第一圖案化發光層362、第二圖案化發光層364以及第二發光層460發光。值得一提的是,在本實施方式中,於第一發光區域A中的第一電極層320與第二電極層490之間、第二發光區域B的第一電極層320與第二電極層490之間分別可形成微共振腔,藉此使得由第一發光層360、第一圖案化發光層362、第二圖案化發光層364以及第二發光層460所分別發出的色光可於對應的微共振腔中產生微共振腔效應,進而使第一發光區域A及第二發光區域B分別顯示出第一色光3IA及第二色光3IB。Based on the first embodiment, it is known that in this embodiment, the white light emitting element 30 drives the first light emitting layer 360, the first patterned light emitting layer 362, and the voltage difference between the first electrode layer 320 and the second electrode layer 490. The second patterned light emitting layer 364 and the second light emitting layer 460 emit light. It is worth mentioning that, in this embodiment, between the first electrode layer 320 and the second electrode layer 490 in the first light-emitting area A, and between the first electrode layer 320 and the second electrode layer in the second light-emitting area B Micro-resonance cavities may be formed between 490 respectively, so that the color light emitted by the first light-emitting layer 360, the first patterned light-emitting layer 362, the second patterned light-emitting layer 364, and the second light-emitting layer 460 can be correspondingly The micro-resonant cavity effect is generated in the micro-resonant cavity, so that the first light-emitting area A and the second light-emitting area B respectively display the first color light 3IA and the second color light 3IB.

詳細而言,如前文所述,在白光發光元件30中,透過微共振腔效應可優化位於第二發光區域B中的第一發光層360及第二發光層460所發的光,藉此第一圖案化發光層362、第二圖案化發光層364及第二發光層460所發出的色光會混合成第一色光3IA而從第一發光區域A射出,且第一發光層360及第二發光層460所發出的色光會混合成第二色光3IB而從第二發光區域B射出。具體而言,在本實施方式中,第一色光3IA為黃光與藍光的混色光,第二色光IB為藍光。如此一來,當白光發光元件30應用於照明時,第一色光3IA與第二色光3IB會混合成白光;而當白光發光元件30應用於顯示器時,可於第一發光區域A中設置紅色濾光層及綠色濾光層或者設置紅色濾光層、綠色濾光層及波長轉換層以獲得紅光與綠光,而無須設置任何藍色濾光層。In detail, as described above, in the white light emitting element 30, the light emitted by the first light emitting layer 360 and the second light emitting layer 460 located in the second light emitting region B can be optimized through the micro-resonance cavity effect, thereby the first The color light emitted from a patterned light-emitting layer 362, the second patterned light-emitting layer 364, and the second light-emitting layer 460 is mixed into a first color light 3IA and emitted from the first light-emitting area A, and the first light-emitting layer 360 and the second The colored light emitted from the light emitting layer 460 is mixed into the second colored light 3IB and emitted from the second light emitting area B. Specifically, in this embodiment, the first color light 3IA is a mixed color light of yellow light and blue light, and the second color light IB is blue light. In this way, when the white light emitting element 30 is applied to lighting, the first color light 3IA and the second color light 3IB are mixed into white light; and when the white light emitting element 30 is applied to a display, red may be set in the first light emitting area A The filter layer and the green filter layer or the red filter layer, the green filter layer, and the wavelength conversion layer are provided to obtain red light and green light, without any blue filter layer.

從另一觀點而言,在本實施方式中,第一圖案化發光層362與第二圖案化發光層364位於第一發光區域A中,藉此使得連續分佈於第一發光區域A及第二發光區域B中的第一發光層360及第二發光層460在設計時可以不用考量第一圖案化發光層362與第二圖案化發光層364的發光效率,進而得以有效地優化由位於第二發光區域B中的第一發光層360及第二發光層460發出的色光所混合而成的第二色光3IB,以提升第二色光3IB的發光效率。From another perspective, in this embodiment, the first patterned light-emitting layer 362 and the second patterned light-emitting layer 364 are located in the first light-emitting area A, so that they are continuously distributed in the first light-emitting area A and the second The first light emitting layer 360 and the second light emitting layer 460 in the light emitting area B can be designed without considering the light emitting efficiency of the first patterned light emitting layer 362 and the second patterned light emitting layer 364, and can be effectively optimized by The second color light 3IB, which is a mixture of the color light emitted from the first light emitting layer 360 and the second light emitting layer 460 in the light emitting area B, is used to improve the light emitting efficiency of the second color light 3IB.

進一步而言,在本實施方式中,由於由位於第二發光區域B中的兩個發光層(即第一發光層360及第二發光層460)發出的色光所混合而成的第二色光3IB可被優化、位於第一發光區域A中的第二發光層460所發的光得以發射至外部、並且第一發光層360及第二發光層460皆為藍色發光層,故與將藍色發光二極體元件和紅-綠色發光二極體元件堆疊在一起的習知堆疊式白光元件相比,白光發光元件30的藍光效率較高。有鑑於此,與所述習知堆疊式白光元件相比,白光發光元件30能夠以較低的操作電流來獲得相當亮度的藍光,因而有效延長第一發光層360及第二發光層460的使用壽命,解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。另一方面,如前文所述,白光發光元件30應用於顯示器時無須設置任何藍色濾光層,藉此得以維持白光發光元件30的藍光效率。Further, in the present embodiment, the second color light 3IB is formed by mixing color light emitted from two light emitting layers (ie, the first light emitting layer 360 and the second light emitting layer 460) located in the second light emitting area B. The light emitted from the second light-emitting layer 460 in the first light-emitting area A, which can be optimized, is emitted to the outside, and the first light-emitting layer 360 and the second light-emitting layer 460 are both blue light-emitting layers. Compared with the conventional stacked white light element in which the light emitting diode element and the red-green light emitting diode element are stacked together, the blue light emitting element 30 has higher blue light efficiency. In view of this, compared with the conventional stacked white light element, the white light emitting element 30 can obtain a relatively bright blue light with a lower operating current, thereby effectively extending the use of the first light emitting layer 360 and the second light emitting layer 460. Service life, solving the problem of light color change and poor reliability after long operation of the conventional stacked white light element. On the other hand, as described above, when the white light emitting element 30 is applied to a display, it is not necessary to provide any blue filter layer, thereby maintaining the blue light efficiency of the white light emitting element 30.

進一步,藉由模擬發光實驗可證實,本發明的白光發光元件30具有良好的藍光效率。圖4是圖3的白光發光元件與習知堆疊式白光元件所發出光的波長與強度的關係圖。詳細而言,模擬實驗中所使用的習知堆疊式白光元件即為將藍色發光二極體元件和紅-綠色發光二極體元件堆疊在一起的習知堆疊式白光元件。由圖4可知,與習知堆疊式白光元件相比,本發明的白光發光元件30能夠發出強度較強的藍光。Further, it can be confirmed by the simulation light emission experiment that the white light emitting element 30 of the present invention has good blue light efficiency. FIG. 4 is a relationship diagram between the wavelength and the intensity of light emitted by the white light emitting element of FIG. 3 and the conventional stacked white light element. In detail, the conventional stacked white light element used in the simulation experiment is a conventional stacked white light element in which a blue light emitting diode element and a red-green light emitting diode element are stacked together. As can be seen from FIG. 4, compared with the conventional stacked white light element, the white light emitting element 30 of the present invention can emit blue light with stronger intensity.

基於第一及第二實施方式可知,透過第一發光單元U1包括位於第一發光區域A及第二發光區域B中的第一發光層360及位於第一發光區域A中的第一圖案化發光層362和第二圖案化發光層364,以及第二發光單元U2包括位於第一發光區域A及第二發光區域B中的第二發光層460,藉此使得在設計第一發光層360及第二發光層460時可以不用考量到第一圖案化發光層362與第二圖案化發光層364的發光效率,進而得以有效地優化第二色光3IB,以提升第二色光3IB的發光效率。如此一來,白光發光元件30可解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。Based on the first and second embodiments, it can be known that the first light-emitting unit U1 includes a first light-emitting layer 360 located in the first light-emitting area A and the second light-emitting area B, and a first patterned light-emitting in the first light-emitting area A. The layer 362 and the second patterned light-emitting layer 364, and the second light-emitting unit U2 includes a second light-emitting layer 460 located in the first light-emitting area A and the second light-emitting area B, thereby enabling the design of the first light-emitting layer 360 and the first light-emitting layer 360. When the two light emitting layers 460 are used, the light emitting efficiency of the first patterned light emitting layer 362 and the second patterned light emitting layer 364 need not be considered, and the second color light 3IB can be effectively optimized to improve the light emission efficiency of the second color light 3IB. In this way, the white light emitting element 30 can solve the problems of light color change and poor reliability after long-term operation of the conventional stacked white light element.

圖5是依照本發明的第三實施方式的白光發光元件的剖面示意圖。請參照圖5,白光發光元件50包括第一發光單元U1、第二發光單元U2以及連接層R,其中第一發光單元U1包括第一電極層520、第一發光層560、第一圖案化發光層562及第二圖案化發光層564,第二發光單元U2包括第二電極層690以及第二發光層660。另外,在本實施方式中,白光發光元件50更可包括基板500、元件層510、電洞注入層530、電洞傳輸層540、電洞傳輸層550、電洞傳輸層552、電子傳輸層570、電子注入層580、電洞注入層630、電洞傳輸層640、電子傳輸層670、電子注入層680,其中第一發光單元U1包括電洞注入層530、電洞傳輸層540、電洞傳輸層550、電洞傳輸層552、電子傳輸層570、電子注入層580,而第二發光單元U2包括電洞注入層630、電洞傳輸層640、電子傳輸層670、電子注入層680。以下,將對上述各構件進行詳細說明。FIG. 5 is a schematic cross-sectional view of a white light emitting element according to a third embodiment of the present invention. Referring to FIG. 5, the white light emitting element 50 includes a first light emitting unit U1, a second light emitting unit U2, and a connection layer R. The first light emitting unit U1 includes a first electrode layer 520, a first light emitting layer 560, and a first patterned light emission. The layer 562 and the second patterned light-emitting layer 564. The second light-emitting unit U2 includes a second electrode layer 690 and a second light-emitting layer 660. In addition, in this embodiment, the white light emitting element 50 may further include a substrate 500, an element layer 510, a hole injection layer 530, a hole transmission layer 540, a hole transmission layer 550, a hole transmission layer 552, and an electron transmission layer 570. , Electron injection layer 580, hole injection layer 630, hole transmission layer 640, electron transmission layer 670, and electron injection layer 680, wherein the first light emitting unit U1 includes a hole injection layer 530, a hole transmission layer 540, and hole transmission The second light-emitting unit U2 includes a hole injection layer 630, a hole transmission layer 640, an electron transmission layer 670, and an electron injection layer 680. Hereinafter, each of the above-mentioned members will be described in detail.

基板500具有第一發光區域A、第二發光區域B及第三發光區域C。在本實施方式中,第一發光區域A、第二發光區域B及第三發光區域C分別用於顯示不同顏色的色光。在本實施方式中,第一發光區域A、第二發光區域B及第三發光區域C可以並列方式排列,亦即第一發光區域A與第二發光區域B相鄰設置,且第二發光區域B與第三發光區域C相鄰設置,但不以此為限。另外,在本實施方式中,基板500的材質例如是玻璃、石英、有機聚合物或是金屬等等。The substrate 500 includes a first light-emitting area A, a second light-emitting area B, and a third light-emitting area C. In this embodiment, the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C are respectively used to display colored light of different colors. In this embodiment, the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C can be arranged side by side, that is, the first light-emitting area A and the second light-emitting area B are arranged adjacent to each other, and the second light-emitting area B is disposed adjacent to the third light emitting region C, but is not limited thereto. In addition, in this embodiment, the material of the substrate 500 is, for example, glass, quartz, organic polymer, or metal.

元件層510配置於基板500上。在本實施方式中,元件層510可以是任何所屬領域中具有通常知識者所周知的任一種主動元件層。具體而言,在本實施方式中,元件層510可包括多個TFT、電容器等驅動元件,然本發明不限於此。The element layer 510 is disposed on the substrate 500. In this embodiment, the element layer 510 may be any type of active element layer known to those having ordinary knowledge in the art. Specifically, in this embodiment, the element layer 510 may include a plurality of driving elements such as TFTs and capacitors, but the present invention is not limited thereto.

第一電極層520配置於基板500上。詳細而言,在本實施方式中,第一電極層520包括彼此分離的電極圖案520a、電極圖案520b及電極圖案520c,其中電極圖案520a位於第一發光區域A中,電極圖案520b位於第二發光區域B中,電極圖案520c位於第三發光區域C中。也就是說,在本實施方式中,第一電極層520為經圖案化的電極層,且第一電極層520位於第一發光區域A、第二發光區域B及第三發光區域C中。The first electrode layer 520 is disposed on the substrate 500. In detail, in this embodiment, the first electrode layer 520 includes an electrode pattern 520a, an electrode pattern 520b, and an electrode pattern 520c separated from each other. The electrode pattern 520a is located in the first light-emitting area A, and the electrode pattern 520b is located in the second light-emitting area. In the region B, the electrode pattern 520c is located in the third light-emitting region C. That is, in this embodiment, the first electrode layer 520 is a patterned electrode layer, and the first electrode layer 520 is located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C.

在本實施方式中,第一電極層520可利用任何所屬領域中具有通常知識者所周知的任一種製造電極層的方法來形成。舉例而言,在一實施方式中,形成第一電極層520的方法包括以下步驟:使用CVD製程或PVD製程於基板500上形成電極材料層,並接著使用微影蝕刻製程對電極材料層進行圖案化。舉另一例而言,在一實施方式中,形成第一電極層520的方法包括進行印刷噴塗製程。In this embodiment, the first electrode layer 520 can be formed by any method for manufacturing an electrode layer known to those having ordinary knowledge in the art. For example, in one embodiment, the method for forming the first electrode layer 520 includes the following steps: forming an electrode material layer on the substrate 500 using a CVD process or a PVD process, and then patterning the electrode material layer using a lithography etching process. Into. For another example, in one embodiment, the method for forming the first electrode layer 520 includes a printing spray process.

另外,在本實施方式中,第一電極層520的材質可包括反射材料,其例如是金屬、合金、金屬氧化物等導電材質,或是金屬與透明金屬氧化物導電材料之堆疊層,上述透明金屬氧化物導電材料例如是銦錫氧化物、銦鋅氧化物、鋁錫氧化物、鋁鋅氧化物、銦鍺鋅氧化物或其它合適的氧化物。也就是說,在本實施方式中,第一電極層520為反射電極層,藉此白光發光元件50屬於上發光型設計。In addition, in this embodiment, the material of the first electrode layer 520 may include a reflective material, such as a conductive material such as a metal, an alloy, a metal oxide, or a stacked layer of a metal and a transparent metal oxide conductive material. The metal oxide conductive material is, for example, indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or other suitable oxides. That is, in the present embodiment, the first electrode layer 520 is a reflective electrode layer, whereby the white light emitting element 50 belongs to an upper light emitting design.

電洞注入層530以及電洞傳輸層540依序配置在第一電極層520上。詳細而言,在本實施方式中,電洞注入層530以及電洞傳輸層540皆位於第一發光區域A、第二發光區域B及第三發光區域C中。另外,電洞注入層530與電洞傳輸層540的形成方法例如包括進行蒸鍍製程或噴墨製程。電洞注入層530的材質例如包括苯二甲藍銅、星狀芳胺類、聚苯胺、聚乙烯二氧噻吩或其他合適的材料。電洞傳輸層540的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件50包括電洞注入層530以及電洞傳輸層540,但本發明並不限於此。在其他實施方式中,白光發光元件50可以僅包括電洞注入層530或電洞傳輸層540,或者白光發光元件50亦可不包括電洞注入層530以及電洞傳輸層540。也就是說,電洞注入層530以及電洞傳輸層540的配置是可選的。The hole injection layer 530 and the hole transmission layer 540 are sequentially disposed on the first electrode layer 520. In detail, in this embodiment, the hole injection layer 530 and the hole transmission layer 540 are all located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. The method of forming the hole injection layer 530 and the hole transport layer 540 includes, for example, performing a vapor deposition process or an inkjet process. The material of the hole injection layer 530 includes, for example, xylylene blue copper, star-shaped aromatic amines, polyaniline, polyethylene dioxythiophene, or other suitable materials. The material of the hole transporting layer 540 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 50 includes a hole injection layer 530 and a hole transmission layer 540, but the present invention is not limited thereto. In other embodiments, the white light emitting element 50 may include only the hole injection layer 530 or the hole transmission layer 540, or the white light emitting element 50 may not include the hole injection layer 530 and the hole transmission layer 540. That is, the configurations of the hole injection layer 530 and the hole transmission layer 540 are optional.

電洞傳輸層550配置於第一電極層520與第一圖案化發光層562之間,用以滿足第一圖案化發光層562所發出的光的光學厚度。詳細而言,在本實施方式中,電洞傳輸層550位於第一發光區域A中。也就是說,電洞傳輸層550為經圖案化的電洞傳輸層。電洞傳輸層550例如是利用蒸鍍製程並搭配FMM或噴墨製程來形成。電洞傳輸層550的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料,且可與電洞傳輸層540相同或不同。The hole transmission layer 550 is disposed between the first electrode layer 520 and the first patterned light-emitting layer 562 to satisfy the optical thickness of the light emitted by the first patterned light-emitting layer 562. In detail, in the present embodiment, the hole transport layer 550 is located in the first light emitting region A. That is, the hole transport layer 550 is a patterned hole transport layer. The hole transport layer 550 is formed by, for example, an evaporation process and a FMM or inkjet process. The material of the hole transport layer 550 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials, and may be the same as or different from the hole transport layer 540.

電洞傳輸層552配置於第一電極層520與第二圖案化發光層564之間,用以滿足第二圖案化發光層564所發出的光的光學厚度。詳細而言,在本實施方式中,電洞傳輸層552的厚度小於電洞傳輸層550的厚度。另外,在本實施方式中,電洞傳輸層552位於第二發光區域B中。也就是說,電洞傳輸層552為經圖案化的電洞傳輸層。電洞傳輸層552例如是利用蒸鍍製程並搭配FMM或噴墨製程來形成。電洞傳輸層552的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料,且可與電洞傳輸層540相同或不同,及可與電洞傳輸層550相同或不同。The hole transmission layer 552 is disposed between the first electrode layer 520 and the second patterned light-emitting layer 564 to satisfy the optical thickness of the light emitted by the second patterned light-emitting layer 564. In detail, in this embodiment, the thickness of the hole transport layer 552 is smaller than the thickness of the hole transport layer 550. In addition, in the present embodiment, the hole transporting layer 552 is located in the second light emitting region B. That is, the hole transport layer 552 is a patterned hole transport layer. The hole transport layer 552 is formed by, for example, a vapor deposition process and an FMM or inkjet process. The material of the hole transport layer 552 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials, and may be the same as or different from the hole transport layer 540, and may be the same as the hole transport layer. The transmission layers 550 are the same or different.

第一圖案化發光層562配置於第一電極層520與第一發光層560之間。詳細而言,在本實施方式中,第一圖案化發光層562是配置於電洞傳輸層550相對於第一電極層520的一側上。另外,在本實施方式中,第一圖案化發光層562位於第一發光區域A中且不位於第二發光區域B中。第一圖案化發光層562例如是使用蒸鍍製程並搭配對應的FMM或噴墨製程來形成。另外,在本實施方式中,第一圖案化發光層562為紅色發光層。也就是說,在本實施方式中,第一圖案化發光層562包括紅色發光材料。The first patterned light emitting layer 562 is disposed between the first electrode layer 520 and the first light emitting layer 560. In detail, in this embodiment, the first patterned light emitting layer 562 is disposed on a side of the hole transport layer 550 opposite to the first electrode layer 520. In addition, in the present embodiment, the first patterned light emitting layer 562 is located in the first light emitting area A and is not located in the second light emitting area B. The first patterned light-emitting layer 562 is formed using, for example, an evaporation process and a corresponding FMM or inkjet process. In addition, in this embodiment, the first patterned light emitting layer 562 is a red light emitting layer. That is, in this embodiment, the first patterned light emitting layer 562 includes a red light emitting material.

第二圖案化發光層564配置於第一電極層520與第一發光層560之間。詳細而言,在本實施方式中,第二圖案化發光層564是配置於電洞傳輸層552相對於第一電極層520的一側上。另外,在本實施方式中,第二圖案化發光層564位於第二發光區域B中且不位於第一發光區域A中。第二圖案化發光層564例如是使用蒸鍍製程並搭配對應的FMM或噴墨製程來形成。另外,在本實施方式中,第二圖案化發光層564為綠色發光層。也就是說,在本實施方式中,第二圖案化發光層564包括綠色發光材料。The second patterned light emitting layer 564 is disposed between the first electrode layer 520 and the first light emitting layer 560. In detail, in this embodiment, the second patterned light emitting layer 564 is disposed on a side of the hole transport layer 552 opposite to the first electrode layer 520. In addition, in the present embodiment, the second patterned light emitting layer 564 is located in the second light emitting area B and is not located in the first light emitting area A. The second patterned light-emitting layer 564 is formed using, for example, an evaporation process and a corresponding FMM or inkjet process. In addition, in this embodiment, the second patterned light emitting layer 564 is a green light emitting layer. That is, in this embodiment, the second patterned light emitting layer 564 includes a green light emitting material.

第一發光層560配置在第一電極層520上。詳細而言,在本實施方式中,第一發光層560位在第一發光區域A、第二發光區域B及第三發光區域C中。更詳細而言,在本實施方式中,在第一發光區域A中,第一發光層560覆蓋第一圖案化發光層562;而在第二發光區域B中,第一發光層560覆蓋第二圖案化發光層564。從另一觀點而言,在本實施方式中,第一圖案化發光層562僅位於第一發光區域A中,第二圖案化發光層564僅位於第二發光區域B中,而第一發光層560為一連續結構層,連續分佈於第一發光區域A、第二發光區域B及第三發光區域C中。值得一提的是,在本實施方式中,由於第一發光層560為一連續結構層,因此第一發光層560不需使用FMM加以形成。詳細而言,在本實施方式中,第一發光層560例如是使用蒸鍍製程或噴墨製程並搭配一般金屬遮罩來形成。The first light emitting layer 560 is disposed on the first electrode layer 520. Specifically, in this embodiment, the first light-emitting layer 560 is located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. In more detail, in this embodiment, in the first light-emitting area A, the first light-emitting layer 560 covers the first patterned light-emitting layer 562; and in the second light-emitting area B, the first light-emitting layer 560 covers the second Patterned light emitting layer 564. From another perspective, in this embodiment, the first patterned light emitting layer 562 is located only in the first light emitting area A, the second patterned light emitting layer 564 is located only in the second light emitting area B, and the first light emitting layer 560 is a continuous structure layer, which is continuously distributed in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. It is worth mentioning that, in this embodiment, since the first light emitting layer 560 is a continuous structure layer, the first light emitting layer 560 does not need to be formed using FMM. In detail, in this embodiment, the first light-emitting layer 560 is formed by using, for example, a vapor deposition process or an inkjet process and a general metal mask.

另外,在本實施方式中,第一發光層560為藍色發光層。也就是說,在本實施方式中,第一發光層560包括藍色發光材料。從另一觀點而言,在本實施方式中,第一發光層560為藍光共通層。值得一提的是,在本實施方式中,第一發光層560需選用電子遷移率較快的材料,以使得在第一發光層560覆蓋第一圖案化發光層562之第一發光區域A中,電子與電洞容易於第一圖案化發光層562中結合而發光,以及在第一發光層560覆蓋第二圖案化發光層564之第二發光區域B中,電子與電洞容易於第二圖案化發光層564中結合而發光。也就是說,本實施方式中,位於第一發光區域A及第二發光區域B中的第一發光層560作用為電子傳輸層。另一方面,在本實施方式中,透過微共振腔效應可優化位於第三發光區域C中的第一發光層560所發的光。In the present embodiment, the first light-emitting layer 560 is a blue light-emitting layer. That is, in this embodiment, the first light emitting layer 560 includes a blue light emitting material. From another perspective, in this embodiment, the first light emitting layer 560 is a blue light common layer. It is worth mentioning that in this embodiment, the first light-emitting layer 560 needs to be selected from a material having a fast electron mobility, so that the first light-emitting layer 560 covers the first light-emitting area A of the first patterned light-emitting layer 562. Electrons and holes are easy to combine and emit light in the first patterned light-emitting layer 562, and in the second light-emitting area B where the first light-emitting layer 560 covers the second patterned light-emitting layer 564, the electrons and holes are easier than the second The patterned light emitting layer 564 is combined to emit light. That is, in this embodiment, the first light emitting layer 560 located in the first light emitting area A and the second light emitting area B functions as an electron transporting layer. On the other hand, in this embodiment, the light emitted by the first light-emitting layer 560 located in the third light-emitting region C can be optimized through the micro-cavity effect.

電子傳輸層570以及電子注入層580依序配置在第一發光層560上。詳細而言,在本實施方式中,電子注入層570以及電子傳輸層580皆位於第一發光區域A、第二發光區域B及第三發光區域C中。另外,電子傳輸層570以及電子注入層580的形成方法例如包括進行蒸鍍製程或噴墨製程。電子傳輸層570的材質例如包括噁唑衍生物及其樹狀物、金屬螯合物、唑類化合物、二氮蒽衍生物、含矽雜環化合物或其他合適的材料。電子注入層580的材質例如包括氧化鋰、氧化鋰硼、矽氧化鉀、碳酸銫、醋酸鈉、氟化鋰鹼或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件50包括電子傳輸層570以及電子注入層580,但本發明並不限於此。在其他實施方式中,白光發光元件50可以僅包括電子傳輸層570或電子注入層580,或者白光發光元件50亦可不包括電子傳輸層570以及電子注入層580。也就是說,電子傳輸層570以及電子注入層580的配置是可選的。The electron transport layer 570 and the electron injection layer 580 are sequentially disposed on the first light emitting layer 560. In detail, in this embodiment, the electron injection layer 570 and the electron transport layer 580 are all located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. The method of forming the electron transport layer 570 and the electron injection layer 580 includes, for example, performing a vapor deposition process or an inkjet process. The material of the electron transporting layer 570 includes, for example, an oxazole derivative and its dendrimer, a metal chelate, an azole compound, a diazanthrene derivative, a silicon-containing heterocyclic compound, or other suitable materials. The material of the electron injection layer 580 includes, for example, lithium oxide, lithium boron oxide, potassium silicon oxide, cesium carbonate, sodium acetate, lithium fluoride base, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 50 includes an electron transport layer 570 and an electron injection layer 580, but the present invention is not limited thereto. In other embodiments, the white light emitting element 50 may include only the electron transporting layer 570 or the electron injection layer 580, or the white light emitting element 50 may not include the electron transporting layer 570 and the electron injection layer 580. That is, the configurations of the electron transport layer 570 and the electron injection layer 580 are optional.

連接層R位於第一發光單元U1以及第二發光單元U2之間,用以使第一發光單元U1與第二發光單元U2串聯在一起。在本實施方式中,連接層R包括導電材料,其例如是氧化鉬(Molybdenum trioxide,MoO 3)、氧化鎢(Tungsten trioxide,WO 3)、鋰或銫。 The connection layer R is located between the first light-emitting unit U1 and the second light-emitting unit U2, and is used for connecting the first light-emitting unit U1 and the second light-emitting unit U2 in series. In this embodiment, the connection layer R includes a conductive material, such as molybdenum trioxide (MoO 3 ), tungsten oxide (Tungsten trioxide, WO 3 ), lithium, or cesium.

電洞注入層630以及電洞傳輸層640依序配置在連接層R上。詳細而言,在本實施方式中,電洞注入層630以及電洞傳輸層640皆位於第一發光區域A、第二發光區域B及第三發光區域C中。另外,電洞注入層630以及電洞傳輸層640的形成方法例如包括進行蒸鍍製程或噴墨製程。電洞注入層630的材質例如包括苯二甲藍銅、星狀芳胺類、聚苯胺、聚乙烯二氧噻吩或其他合適的材料。電洞傳輸層640的材質例如包括三芳香胺類、交叉結構二胺聯苯、二胺聯苯衍生物或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件50包括電洞注入層630以及電洞傳輸層640,但本發明並不限於此。在其他實施方式中,白光發光元件50可以僅包括電洞注入層630或電洞傳輸層640,或者白光發光元件50亦可不包括電洞注入層630以及電洞傳輸層640。也就是說,電洞注入層630以及電洞傳輸層640的配置是可選的。The hole injection layer 630 and the hole transmission layer 640 are sequentially disposed on the connection layer R. In detail, in this embodiment, the hole injection layer 630 and the hole transmission layer 640 are all located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. The method of forming the hole injection layer 630 and the hole transport layer 640 includes, for example, performing a vapor deposition process or an inkjet process. The material of the hole injection layer 630 includes, for example, xylylene blue copper, star-shaped aromatic amines, polyaniline, polyethylene dioxythiophene, or other suitable materials. The material of the hole transporting layer 640 includes, for example, triarylamines, cross-structured diamine biphenyls, diamine biphenyl derivatives, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 50 includes a hole injection layer 630 and a hole transmission layer 640, but the present invention is not limited thereto. In other embodiments, the white light emitting element 50 may include only the hole injection layer 630 or the hole transmission layer 640, or the white light emitting element 50 may not include the hole injection layer 630 and the hole transmission layer 640. That is, the configurations of the hole injection layer 630 and the hole transmission layer 640 are optional.

第二發光層660配置在連接層R上。詳細而言,在本實施方式中,第二發光層660位在第一發光區域A、第二發光區域B及第三發光區域C中。也就是說,第二發光層660為一連續結構層,連續分佈於第一發光區域A、第二發光區域B及第三發光區域C中。值得一提的是,在本實施方式中,由於第二發光層660為一連續結構層,因此第二發光層660不需使用FMM加以形成。詳細而言,在本實施方式中,第二發光層660例如是使用蒸鍍製程或噴墨製程並搭配一般金屬遮罩來形成。The second light emitting layer 660 is disposed on the connection layer R. Specifically, in this embodiment, the second light-emitting layer 660 is located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. That is, the second light-emitting layer 660 is a continuous structure layer and is continuously distributed in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. It is worth mentioning that, in this embodiment, since the second light-emitting layer 660 is a continuous structure layer, the second light-emitting layer 660 does not need to be formed using FMM. In detail, in this embodiment, the second light-emitting layer 660 is formed by using, for example, a vapor deposition process or an inkjet process and a common metal mask.

另外,在本實施方式中,第二發光層660為藍色發光層。也就是說,在本實施方式中,第二發光層660包括藍色發光材料。從另一觀點而言,在本實施方式中,第二發光層660為藍光共通層。從又一觀點而言,在本實施方式中,第一發光層560及第二發光層660可發出相同顏色的色光。值得一提的是,在本實施方式中,透過微共振腔效應,第二發光層660所發的光能夠自第一發光區域A、第二發光區域B及第三發光區域C發射至外部。In this embodiment, the second light-emitting layer 660 is a blue light-emitting layer. That is, in this embodiment, the second light emitting layer 660 includes a blue light emitting material. From another perspective, in this embodiment, the second light emitting layer 660 is a blue light common layer. From another perspective, in this embodiment, the first light emitting layer 560 and the second light emitting layer 660 can emit colored light of the same color. It is worth mentioning that, in this embodiment, the light emitted by the second light-emitting layer 660 can be emitted from the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C to the outside through the micro-cavity effect.

電子傳輸層670以及電子注入層680依序配置在第二發光層660上。詳細而言,在本實施方式中,電子注入層670以及電子傳輸層680皆位於第一發光區域A、第二發光區域B及第三發光區域C中。另外,電子傳輸層670以及電子注入層680的形成方法例如包括進行蒸鍍製程或噴墨製程。電子傳輸層670的材質例如包括噁唑衍生物及其樹狀物、金屬螯合物、唑類化合物、二氮蒽衍生物、含矽雜環化合物或其他合適的材料。電子注入層680的材質例如包括氧化鋰、氧化鋰硼、矽氧化鉀、碳酸銫、醋酸鈉、氟化鋰鹼或其他合適的材料。值得一提的是,在本實施方式中,白光發光元件50包括電子傳輸層670以及電子注入層680,但本發明並不限於此。在其他實施方式中,白光發光元件50可以僅包括電子傳輸層670或電子注入層680,或者白光發光元件50亦可不包括電子傳輸層670以及電子注入層680。也就是說,電子傳輸層670以及電子注入層680的配置是可選的。The electron transport layer 670 and the electron injection layer 680 are sequentially disposed on the second light emitting layer 660. In detail, in this embodiment, the electron injection layer 670 and the electron transport layer 680 are all located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. The method of forming the electron transport layer 670 and the electron injection layer 680 includes, for example, performing a vapor deposition process or an inkjet process. The material of the electron transporting layer 670 includes, for example, an oxazole derivative and a dendrimer thereof, a metal chelate compound, an azole compound, a diazaanthracene derivative, a silicon-containing heterocyclic compound, or other suitable materials. The material of the electron injection layer 680 includes, for example, lithium oxide, lithium boron oxide, potassium silicon oxide, cesium carbonate, sodium acetate, lithium fluoride base, or other suitable materials. It is worth mentioning that, in this embodiment, the white light emitting element 50 includes an electron transport layer 670 and an electron injection layer 680, but the present invention is not limited thereto. In other embodiments, the white light emitting element 50 may include only the electron transporting layer 670 or the electron injection layer 680, or the white light emitting element 50 may not include the electron transporting layer 670 and the electron injection layer 680. That is, the configurations of the electron transport layer 670 and the electron injection layer 680 are optional.

第二電極層690配置於第二發光層660上。詳細而言,在本實施方式中,第二電極層690位於第一發光區域A、第二發光區域B及第三發光區域C中。在本實施方式中,第二電極層690的材質例如包括透明金屬氧化物導電材料,其例如是銦錫氧化物、銦鋅氧化物、鋁錫氧化物、鋁鋅氧化物、銦鍺鋅氧化物或其它合適的氧化物;金屬;或是上述所列至少二者之堆疊層。也就是說,在本實施方式中,第二電極層690可以為透明電極層或者半穿透半反射電極層。The second electrode layer 690 is disposed on the second light emitting layer 660. Specifically, in this embodiment, the second electrode layer 690 is located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C. In this embodiment, the material of the second electrode layer 690 includes, for example, a transparent metal oxide conductive material, which is, for example, indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide. Or other suitable oxides; metals; or stacked layers of at least two of the above. That is, in this embodiment, the second electrode layer 690 may be a transparent electrode layer or a semi-transparent and semi-reflective electrode layer.

另外,在本實施方式中,第一電極層520作為陽極,而第二電極層690作為陰極。但必需說明的,就以設計上的需求來說,第一電極層520也可能作為陰極,而第二電極層690則作為陽極。進一步而言,白光發光元件50是透過第一電極層520與第二電極層690間產生電壓差來驅動第一發光層560、第一圖案化發光層562、第二圖案化發光層564以及第二發光層660發光。In addition, in this embodiment, the first electrode layer 520 functions as an anode, and the second electrode layer 690 functions as a cathode. However, it must be noted that, in terms of design requirements, the first electrode layer 520 may also serve as a cathode, and the second electrode layer 690 may serve as an anode. Further, the white light emitting element 50 drives the first light emitting layer 560, the first patterned light emitting layer 562, the second patterned light emitting layer 564, and the first light emitting layer through a voltage difference between the first electrode layer 520 and the second electrode layer 690. The two light emitting layers 660 emit light.

值得一提的是,在白光發光元件50中,於第一發光區域A中的第一電極層520與第二電極層690之間、第二發光區域B的第一電極層520與第二電極層690之間、以及第三發光區域C的第一電極層520與第二電極層690之間分別可形成微共振腔,藉此使得由第一發光層560、第一圖案化發光層562、第二圖案化發光層564以及第二發光層660所分別發出的色光可於對應的微共振腔中產生微共振腔效應,進而使第一發光區域A、第二發光區域B及第三發光區域C分別顯示出第一色光5IA、第二色光5IB及第三色光5IC。It is worth mentioning that, in the white light emitting element 50, between the first electrode layer 520 and the second electrode layer 690 in the first light emitting area A, and the first electrode layer 520 and the second electrode in the second light emitting area B Micro-resonance cavities may be formed between the layers 690 and between the first electrode layer 520 and the second electrode layer 690 of the third light-emitting region C, thereby enabling the first light-emitting layer 560, the first patterned light-emitting layer 562, The colored light emitted by the second patterned light-emitting layer 564 and the second light-emitting layer 660 can generate a micro-resonance cavity effect in the corresponding micro-resonance cavity, thereby making the first light-emitting area A, the second light-emitting area B, and the third light-emitting area. C displays the first color light 5IA, the second color light 5IB, and the third color light 5IC, respectively.

詳細而言,如前文所述,在白光發光元件50中,透過微共振腔效應可優化位於第三發光區域C中的第一發光層560及第二發光層660所發的光,藉此第一圖案化發光層562及第二發光層660所發出的色光會混合成第一色光5IA而從第一發光區域A射出,第二圖案化發光層564及第二發光層660所發出的色光會混合成第二色光5IB而從第二發光區域B射出,且第一發光層560及第二發光層660所發出的色光會混合成第三色光5IC而從第三發光區域C射出。具體而言,在本實施方式中,第一色光5IA為紅光與藍光的混色光,第二色光5IB為綠光與藍光的混色光,第三色光5IC為藍光。如此一來,當白光發光元件50應用於照明時,第一色光5IA、第二色光5IB及第三色光5IC會混合成白光;而當白光發光元件50應用於顯示器時,可於第一發光區域A中設置紅色濾光層或者設置紅色波長轉換層以獲得紅光,於第二發光區域B中設置綠色濾光層或者設置綠色波長轉換層以獲得綠光,而無須設置任何藍色濾光層。In detail, as described above, in the white light emitting element 50, the light emitted from the first light emitting layer 560 and the second light emitting layer 660 located in the third light emitting region C can be optimized through the micro-resonance cavity effect. The colored light emitted by a patterned light-emitting layer 562 and the second light-emitting layer 660 is mixed into a first colored light 5IA and emitted from the first light-emitting area A. The colored light emitted by the second patterned light-emitting layer 564 and the second light-emitting layer 660 The second color light 5IB is mixed and emitted from the second light-emitting area B, and the color light emitted by the first light-emitting layer 560 and the second light-emitting layer 660 is mixed into the third color light 5IC and emitted from the third light-emitting area C. Specifically, in this embodiment, the first color light 5IA is a mixed color light of red light and blue light, the second color light 5IB is a mixed color light of green light and blue light, and the third color light 5IC is blue light. In this way, when the white light emitting element 50 is applied to lighting, the first color light 5IA, the second color light 5IB, and the third color light 5IC are mixed into white light; and when the white light emitting element 50 is applied to a display, the first light A red filter layer or a red wavelength conversion layer is provided in the area A to obtain red light, and a green filter layer or a green wavelength conversion layer is provided in the second light emitting area B to obtain green light without any blue filter. Floor.

從另一觀點而言,在本實施方式中,第一圖案化發光層562位於第一發光區域A中且第二圖案化發光層564位於第二發光區域B中,藉此使得連續分佈於第一發光區域A、第二發光區域B及第三發光區域C中的第一發光層560及第二發光層660在設計時可以不用考量第一圖案化發光層562與第二圖案化發光層564的發光效率,進而得以有效地優化由位於第三發光區域C中的第一發光層560及第二發光層660發出的色光所混合而成的第三色光5IC,以提升第三色光5IC的發光效率。From another point of view, in this embodiment, the first patterned light-emitting layer 562 is located in the first light-emitting area A and the second patterned light-emitting layer 564 is located in the second light-emitting area B, so that it is continuously distributed in the first light-emitting area B. The first light-emitting layer 560 and the second light-emitting layer 660 in one light-emitting area A, the second light-emitting area B, and the third light-emitting area C can be designed without considering the first patterned light-emitting layer 562 and the second patterned light-emitting layer 564. The light emitting efficiency of the third color light 5IC can be effectively optimized by mixing the color light emitted from the first light emitting layer 560 and the second light emitting layer 660 in the third light emitting area C to enhance the light emission of the third color light 5IC. effectiveness.

進一步而言,在本實施方式中,由於由位於第三發光區域C中的兩個發光層(即第一發光層560及第二發光層660)發出的色光所混合而成的第三色光5IC可被優化、位於第一發光區域A及第二發光區域B中的第二發光層660所發的光得以發射至外部、並且第一發光層560及第二發光層660皆為藍色發光層,故與將藍色發光二極體元件和紅-綠色發光二極體元件堆疊在一起的習知堆疊式白光元件相比,白光發光元件50的藍光效率較高。有鑑於此,與所述習知堆疊式白光元件相比,白光發光元件50能夠以較低的操作電流來獲得相當亮度的藍光,因而有效延長第一發光層560與第二發光層660的使用壽命,解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。另一方面,如前文所述,白光發光元件50應用於顯示器時無須設置任何藍色濾光層,藉此得以維持白光發光元件50的藍光效率。Further, in this embodiment, the third color light 5IC is formed by mixing color light emitted from two light emitting layers (ie, the first light emitting layer 560 and the second light emitting layer 660) located in the third light emitting region C. The light emitted from the second light-emitting layer 660 in the first light-emitting area A and the second light-emitting area B, which can be optimized, is emitted to the outside, and the first light-emitting layer 560 and the second light-emitting layer 660 are blue light-emitting layers. Therefore, compared with a conventional stacked white light element in which a blue light emitting diode element and a red-green light emitting diode element are stacked together, the blue light emitting element 50 has a higher blue light efficiency. In view of this, compared with the conventional stacked white light element, the white light emitting element 50 can obtain a relatively bright blue light with a lower operating current, thus effectively extending the use of the first light emitting layer 560 and the second light emitting layer 660 Service life, solving the problem of light color change and poor reliability after long operation of the conventional stacked white light element. On the other hand, as described above, when the white light emitting element 50 is applied to a display, it is not necessary to provide any blue filter layer, thereby maintaining the blue light efficiency of the white light emitting element 50.

進一步,藉由模擬發光實驗可證實,本發明的白光發光元件50具有良好的藍光效率。圖6是圖5的白光發光元件與習知堆疊式白光元件所發出光的波長與強度的關係圖。詳細而言,模擬實驗中所使用的習知堆疊式白光元件即為將藍色發光二極體元件和紅-綠色發光二極體元件堆疊在一起的習知堆疊式白光元件。由圖6可知,與習知堆疊式白光元件相比,本發明的白光發光元件50能夠發出強度較強的藍光。Further, it can be confirmed by the simulation light emission experiment that the white light emitting element 50 of the present invention has good blue light efficiency. FIG. 6 is a relationship diagram between the wavelength and the intensity of light emitted by the white light emitting element of FIG. 5 and the conventional stacked white light element. In detail, the conventional stacked white light element used in the simulation experiment is a conventional stacked white light element in which a blue light emitting diode element and a red-green light emitting diode element are stacked together. As can be seen from FIG. 6, compared with the conventional stacked white light element, the white light emitting element 50 of the present invention can emit blue light with stronger intensity.

基於第一及第三實施方式可知,透過第一發光單元U1包括位於第一發光區域A、第二發光區域B及第三發光區域C中的第一發光層560,位於第一發光區域A中的第一圖案化發光層562及位於第二發光區域B中的第二圖案化發光層564,以及第二發光單元U2包括位於第一發光區域A、第二發光區域B及第三發光區域C中的第二發光層660,藉此使得在設計第一發光層560及第二發光層660時可以不用考量到第一圖案化發光層562與第二圖案化發光層564的發光效率,進而得以有效地優化第三色光5IC,以提升第三色光5IC的發光效率。如此一來,白光發光元件50可解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。Based on the first and third embodiments, it can be known that the first light-emitting unit U1 includes a first light-emitting layer 560 located in the first light-emitting area A, the second light-emitting area B, and the third light-emitting area C, and is located in the first light-emitting area A. The first patterned light emitting layer 562 and the second patterned light emitting layer 564 located in the second light emitting area B, and the second light emitting unit U2 includes the first light emitting area A, the second light emitting area B, and the third light emitting area C. The second light-emitting layer 660 can be used to design the first light-emitting layer 560 and the second light-emitting layer 660 without considering the light-emitting efficiency of the first patterned light-emitting layer 562 and the second patterned light-emitting layer 564. Effectively optimize the third color light 5IC to improve the luminous efficiency of the third color light 5IC. In this way, the white light emitting element 50 can solve the problems of light color change and poor reliability after a long-term operation of the conventional stacked white light element.

綜上所述,前述實施方式所提出的白光發光元件包括第一發光單元、第二發光單元及連接第一發光單元和第二發光單元的連接層,其中第一發光單元包括位於第一發光區域及第二發光區域中的第一發光層,第二發光單元包括位於第一發光區域及第二發光區域中的第二發光層,且第一發光單元與第二發光單元中的至少一者包括位於第一發光區域或第二發光區域中的至少一圖案化發光層,藉此使得在設計第一發光層及第二發光層時可以不用考量到圖案化發光層的發光效率,進而得以有效地優化由第一發光層及第二發光層所發射出的色光,以提升該色光的發光效率。如此一來,白光發光元件可解決習知堆疊式白光元件之長時操作後的光色改變、可靠度不佳的問題。In summary, the white light emitting element proposed in the foregoing embodiment includes a first light emitting unit, a second light emitting unit, and a connection layer connecting the first light emitting unit and the second light emitting unit, wherein the first light emitting unit includes a first light emitting region. And the first light emitting layer in the second light emitting region, the second light emitting unit includes a second light emitting layer located in the first light emitting region and the second light emitting region, and at least one of the first light emitting unit and the second light emitting unit includes At least one patterned light-emitting layer located in the first light-emitting area or the second light-emitting area, thereby making it possible to effectively design the first light-emitting layer and the second light-emitting layer without considering the light-emitting efficiency of the patterned light-emitting layer, thereby effectively The color light emitted by the first light-emitting layer and the second light-emitting layer is optimized to improve the light-emitting efficiency of the color light. In this way, the white light emitting element can solve the problems of light color change and poor reliability after long-term operation of the conventional stacked white light element.

雖然本發明已以實施方式揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed as above in the embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouches without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

10、30、50‧‧‧白光發光元件
100、300、500‧‧‧基板
110、310、510‧‧‧元件層
120、320、520‧‧‧第一電極層
120a、120b、320a、320b、520a、520b、520c‧‧‧電極圖案
130、230、330、430、530、630‧‧‧電洞注入層
40、150、240、250、340、350、440、540、550、552、640‧‧‧電洞傳輸層
160、360、560‧‧‧第一發光層
162、362、562‧‧‧第一圖案化發光層
260、460、660‧‧‧第二發光層
262、364、564‧‧‧第二圖案化發光層
170、270、370、470、570、670‧‧‧電子傳輸層
180、280、380、480、580、680‧‧‧電子注入層
290、490、690‧‧‧第二電極層
A‧‧‧第一發光區域
B‧‧‧第二發光區域
C‧‧‧第三發光區域
R‧‧‧連接層
IA、3IA、5IA‧‧‧第一色光
IB、3IB、5IB‧‧‧第二色光
5IC‧‧‧第三色光
U1‧‧‧第一發光單元
U2‧‧‧第二發光單元
10, 30, 50‧‧‧‧ white light emitting elements
100, 300, 500‧‧‧ substrates
110, 310, 510‧‧‧‧layer
120, 320, 520‧‧‧ first electrode layer
120a, 120b, 320a, 320b, 520a, 520b, 520c‧‧‧ electrode pattern
130, 230, 330, 430, 530, 630‧‧‧ Hole injection layer
40, 150, 240, 250, 340, 350, 440, 540, 550, 552, 640‧‧‧ hole transmission layer
160, 360, 560‧‧‧The first light-emitting layer
162, 362, 562‧‧‧‧The first patterned light emitting layer
260, 460, 660‧‧‧Second luminescent layer
262, 364, 564‧‧‧Second patterned light emitting layer
170, 270, 370, 470, 570, 670‧‧‧electronic transmission layer
180, 280, 380, 480, 580, 680‧‧‧ electron injection layer
290, 490, 690‧‧‧Second electrode layer
A‧‧‧The first light-emitting area
B‧‧‧Second light-emitting area
C‧‧‧ third light emitting area
R‧‧‧ connection layer
IA, 3IA, 5IA‧‧‧First color
IB, 3IB, 5IB‧‧‧Second color light
5IC‧‧‧Third color light
U1‧‧‧first light emitting unit
U2‧‧‧Second light emitting unit

圖1是依照本發明的第一實施方式的白光發光元件的剖面示意圖。 圖2是圖1的白光發光元件與習知堆疊式白光元件所發出光的波長與強度的關係圖。 圖3是依照本發明的第二實施方式的白光發光元件的剖面示意圖。 圖4是圖3的白光發光元件與習知堆疊式白光元件所發出光的波長與強度的關係圖。 圖5是依照本發明的第三實施方式的白光發光元件的剖面示意圖。 圖6是圖5的白光發光元件與習知堆疊式白光元件所發出光的波長與強度的關係圖。FIG. 1 is a schematic cross-sectional view of a white light emitting element according to a first embodiment of the present invention. FIG. 2 is a graph showing the relationship between the wavelength and the intensity of light emitted by the white light emitting element of FIG. 1 and the conventional stacked white light element. 3 is a schematic cross-sectional view of a white light emitting element according to a second embodiment of the present invention. FIG. 4 is a relationship diagram between the wavelength and the intensity of light emitted by the white light emitting element of FIG. 3 and the conventional stacked white light element. FIG. 5 is a schematic cross-sectional view of a white light emitting element according to a third embodiment of the present invention. FIG. 6 is a relationship diagram between the wavelength and the intensity of light emitted by the white light emitting element of FIG. 5 and the conventional stacked white light element.

Claims (9)

一種白光發光元件,具有第一發光區域及第二發光區域,其中該白光發光元件包括:第一發光單元,包括:第一電極層;以及第一發光層,配置於該第一電極層上且位於該第一發光區域及該第二發光區域中;第二發光單元,包括:第二發光層,位於該第一發光區域及該第二發光區域中,其中該第一發光層為藍色發光層,該第二發光層為藍色發光層;以及第二電極層,配置於該第二發光層上;以及連接層,位於該第一發光單元與該第二發光單元之間,以使該第一發光單元與該第二發光單元串聯,其中該第一發光單元與該第二發光單元中的至少一者包括至少一圖案化發光層,該至少一圖案化發光層位於該第一發光區域或該第二發光區域中。A white light emitting element having a first light emitting region and a second light emitting region, wherein the white light emitting element includes: a first light emitting unit including: a first electrode layer; and a first light emitting layer disposed on the first electrode layer and Located in the first light emitting area and the second light emitting area; the second light emitting unit includes: a second light emitting layer located in the first light emitting area and the second light emitting area, wherein the first light emitting layer is blue light Layer, the second light emitting layer is a blue light emitting layer; and a second electrode layer is disposed on the second light emitting layer; and a connection layer is located between the first light emitting unit and the second light emitting unit, so that the A first light emitting unit is connected in series with the second light emitting unit, wherein at least one of the first light emitting unit and the second light emitting unit includes at least one patterned light emitting layer, and the at least one patterned light emitting layer is located in the first light emitting area. Or in the second light-emitting area. 如申請專利範圍第1項所述的白光發光元件,其中該至少一圖案化發光層包括第一圖案化發光層及第二圖案化發光層。The white light emitting device according to item 1 of the scope of patent application, wherein the at least one patterned light emitting layer includes a first patterned light emitting layer and a second patterned light emitting layer. 如申請專利範圍第2項所述的白光發光元件,其中該第一圖案化發光層位於該第一發光區域中且不位於該第二發光區域中,該第二圖案化發光層位於該第一發光區域中且不位於該第二發光區域中。The white light-emitting device according to item 2 of the scope of patent application, wherein the first patterned light-emitting layer is located in the first light-emitting area and not in the second light-emitting area, and the second patterned light-emitting layer is located in the first Is in the light emitting area and is not located in the second light emitting area. 如申請專利範圍第3項所述的白光發光元件,其中:該第一發光單元包括該第一圖案化發光層,其中該第一圖案化發光層配置於該第一電極層與該第一發光層之間;以及該第二發光單元包括該第二圖案化發光層,且該第二圖案化發光層配置於該連接層與該第二發光層之間。The white light emitting element according to item 3 of the scope of patent application, wherein the first light emitting unit includes the first patterned light emitting layer, wherein the first patterned light emitting layer is disposed between the first electrode layer and the first light emitting element. Between layers; and the second light emitting unit includes the second patterned light emitting layer, and the second patterned light emitting layer is disposed between the connection layer and the second light emitting layer. 如申請專利範圍第3項所述的白光發光元件,其中:該第一發光單元包括該第一圖案化發光層及該第二圖案化發光層,該第一圖案化發光層及該第二圖案化發光層配置於該第一電極層與該第一發光層之間,且該第一圖案化發光層配置於該第一電極層與該第二圖案化發光層之間。The white light emitting element according to item 3 of the scope of patent application, wherein the first light emitting unit includes the first patterned light emitting layer and the second patterned light emitting layer, the first patterned light emitting layer and the second pattern The patterned light emitting layer is disposed between the first electrode layer and the first light emitting layer, and the first patterned light emitting layer is disposed between the first electrode layer and the second patterned light emitting layer. 如申請專利範圍第2項所述的白光發光元件,其中該白光發光元件更包括第三發光區域,該第一發光層更位於該第三發光區域中,該第二發光層更位於該第三發光區域中。The white light emitting element according to item 2 of the scope of patent application, wherein the white light emitting element further includes a third light emitting region, the first light emitting layer is further located in the third light emitting region, and the second light emitting layer is further located in the third light emitting region. Glowing area. 如申請專利範圍第6項所述的白光發光元件,其中該第一圖案化發光層位於該第一發光區域中且不位於該第二發光區域中,該第二圖案化發光層位於該第二發光區域中且不位於該第一發光區域中。The white light-emitting device according to item 6 of the application, wherein the first patterned light-emitting layer is located in the first light-emitting area and not in the second light-emitting area, and the second patterned light-emitting layer is located in the second In the light emitting area and not in the first light emitting area. 如申請專利範圍第7項所述的白光發光元件,其中:該第一發光單元包括該第一圖案化發光層及該第二圖案化發光層,且該第一圖案化發光層及該第二圖案化發光層配置於該第一電極層與該第一發光層之間。The white light-emitting device according to item 7 of the scope of patent application, wherein the first light-emitting unit includes the first patterned light-emitting layer and the second patterned light-emitting layer, and the first patterned light-emitting layer and the second The patterned light emitting layer is disposed between the first electrode layer and the first light emitting layer. 如申請專利範圍第2項所述的白光發光元件,其中該第一圖案化發光層為紅色發光層,該第二圖案化發光層為綠色發光層。The white light emitting element according to item 2 of the scope of the patent application, wherein the first patterned light emitting layer is a red light emitting layer, and the second patterned light emitting layer is a green light emitting layer.
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TW200701826A (en) * 2005-06-16 2007-01-01 Au Optronics Corp Method for improving color-shift of serially connected organic electroluminescence device

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