200826730 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種有機電激發光裴置， 高分子有機電激發光裝置。 、彳關於一種 【先前技術】 有機電激發光裝置具有自發光、無視角、、 製程簡易、低成本、操作溫度範圍廣、高應答省電、 彩化等性質，使其具有極大的潛力’可望心新== 顯示裝置之主流。有機電激發光裝置係由有機電激發光 元件所構成，有機電激發光元件係利用有機官=性 材料（organic functional materials)的白欢 μ n α y W目發光的特 性來達到顯示效果。有機電激發光裝置可依照材料 的分子量不同分為小分子有機電激發光裝置 (small molecule OLED，SM-OLED )與高分子有機 電激發光裝置（polymer light-emitting device v PLED)兩大類。 ’ 如圖1所示，習知有機電激發光裝置i係包含一基板 11與至少一有機電激發光元件10設置於基板U上。其 中’有機電激發光元件10包含一陽極12、至少一有機電 激發光層13以及一陰極14依序形成於基板11上，其作 用原理係當對電極12、14施以電流時，電洞和電子在有 機電激發光層13内再結合（recombination)所產生的激子 (exciton)能夠激發有機電激發光層13中的發光分子， 6 200826730 然後激發態的發光分子以光的形式釋放出能量，而產生不 同顏色之放光機制。 其中，有機電激發光材料是有機電激發光裝置丨中最 重要的材料之一，選擇有機電激發光材料至少2須滿足四 項要求。第一是具有高的螢光量子效率，且發光波♦在可 見光區域内，波長範圍狹窄；第二是具有良好的半導體特 性，即具有高的導電率，能傳導電子或電洞，或是兩者兼 具；第三是具有良好的成膜性，其薄膜不會產生針孔（pin hole)等缺陷；第四是有良好的熱穩定性，高溫蒸鍍下不 會裂解，且其薄膜不易產生結晶現象。 就高分子有機電激發光元件10的材料技術面而言， 綠色發光材料的發展最為成熟，截至目前為止，綠色高分 子有機電激發光元件10不論是發光效率或元件壽命都已 符合量產的條件，然而，藍色與紅色高分子有機電激發光 元件1〇則亟欲改進，其中以紅色高分子有機電激發光元 件為例’其之有機電激發光層13是以單一螢光高分子發 光材料溶解於溶劑（例如曱苯或二曱苯）中，再利用旋轉 塗佈（spin coating)或喷墨印刷（ink-jet printing)等濕製 程（wet process)形成於陽極12之上，但此種單一螢光高 分子發光材料製成之有機電激發光元件1〇通常亮度不高 且效率偏低。為解決上述問題，習知係利用高效率之磷光 高分子發光材料取代螢光高分子發光材料，然而，磷光高 分子發光材料存在著量產困難以及成本高的問題。 有鑑於此，如何解決上述問題以提供一種高發光效率 7 200826730 且成本低之高分子有機電激發光裝置，實為現今的重要課 題之'~ ° 【發明内容】 有鑑於上述課題，本發明之目的為提供一種高發光效 率且成本低之南分子有機電激發光裝置。 緣是，為達上述目的，依據本發明之—種名 電激發光裝置包含-基板、-第_電極、_有^=: 及一第二電極。其中，第一電極係設置於基板之上；有機 官能層具有一發光層，發光層係包含相同光色之一第一發 光材料及一第二發光材料；第二電極係設置於有機官能層 之上。 匕曰 承上所述，因依據本發明之一種高分子有機電激發光 裝置係混合相同光色之二種或二種以上的發光材料於發 光層中。相較於習知技術’本發明使用複數發光材料於發 光層中較習知單-發紐料具妓高的發光效率，且較使 _光材料又具有更低叙製作成本，並聽製作填 料之困難度。 【實施方式】 以下將參照相關圖式， 種高分子有機電激發光裝置 參照符號加以說明。 說明依本發明較佳實施例之一 ，其中相同的元件將以相同的 請參照圖2所示 依據本發明較佳實施例之一種高分 8 200826730 子有機電激發光t置2包含—基板21、—第―電極22、 有機B能層23以及一第二電極24。 在本實施例中，基板21係可選自剛性基板、柔性基 板、玻璃基板、塑膠基板及矽基板至少其中之一，I某板 之材質係選自聚曱基丙烯塑膠、高分子、玻璃二石夕 至少其中之一。 、第一電極22係設置於基板21之上，第一電極^通 常為陽極，其材質係可為導電之金屬氧化物，導電之金屬 氧化物係選自銦錫氧化物、鋁鋅氧化物、銦鋅氧化物及鑛 錫氧化物至少其中之一，例如係用濺鍍（sputtering)或離 子電鍍（ion plating)等方式形成於基板21之上。 有機官能層23係設置於第一電極22之上，其係可包 含一發光層233以例如旋轉塗佈、喷墨列印、沉浸或喷淋 專之方式形成，本實施例之發光層233係包含相同光色之 一第一發光材料及一第二發光材料’該光色係可為構成全 彩有機電激發光裝置之三原色其中之一。在本實施例中， 第一發光材料與第二發光材料係為三原色之一的通用發 光材料，藉由混合二種相同光色之發光材料於發光層233 中’而增加產生預定光色之有機電激發光裝置2的發光效 率。舉例來說，第一發光材料與第二發光材料係可為選自 通常用於產生藍色、綠色或紅色之發光材料，在本實施例 中’藍色、綠色或紅色之發光材料係分別可如下列式所 示，但不以此為限： 式⑴ 200826730200826730 IX. Description of the Invention: [Technical Field] The present invention relates to an organic electroluminescent device, a polymer organic electroluminescent device.彳About [Prior Art] Organic electroluminescent device has self-illumination, no viewing angle, simple process, low cost, wide operating temperature range, high response power saving, colorization and other properties, making it have great potential. Wang Xinxin == The mainstream of display devices. The organic electroluminescence device is composed of an organic electroluminescence device, and the organic electroluminescence device exhibits a display effect by utilizing the characteristics of white organic light of organic functional materials. The organic electroluminescent device can be divided into two types: small molecule OLED (SM-OLED) and polymer light-emitting device (PLED) according to the molecular weight of the material. As shown in FIG. 1, a conventional organic electroluminescent device i includes a substrate 11 and at least one organic electroluminescent device 10 disposed on a substrate U. The organic electroluminescent device 10 includes an anode 12, at least one organic electroluminescent layer 13 and a cathode 14 sequentially formed on the substrate 11. The principle of operation is when the electrodes 12 and 14 are applied with current. The exciton generated by recombination of electrons in the organic electroluminescent layer 13 can excite the luminescent molecules in the organic electroluminescent layer 13, 6 200826730 and then the excited luminescent molecules are released in the form of light. Energy, and produce a different color of the light-emitting mechanism. Among them, the organic electroluminescent material is one of the most important materials in the organic electroluminescent device, and the selection of the organic electroluminescent material must meet at least four requirements. The first is that it has high fluorescence quantum efficiency, and the illuminating wave ♦ is in the visible light region, and the wavelength range is narrow. The second is that it has good semiconductor characteristics, that is, has high conductivity, can conduct electrons or holes, or both. The third is that it has good film-forming properties, and the film does not cause defects such as pin holes; the fourth is that it has good thermal stability, does not crack under high-temperature evaporation, and its film is not easily produced. Crystallization phenomenon. As far as the material technology of the polymer organic electroluminescent device 10 is concerned, the development of the green luminescent material is the most mature. Up to now, the green polymer organic electroluminescent device 10 has been in mass production regardless of luminous efficiency or component lifetime. Conditions, however, the blue and red polymer organic electroluminescent elements are improved, in which the red polymer organic electroluminescent device is taken as an example. The organic electroluminescent layer 13 is a single fluorescent polymer. The luminescent material is dissolved in a solvent such as toluene or diphenylbenzene, and is formed on the anode 12 by a wet process such as spin coating or ink-jet printing. The organic electroluminescent device 1 made of such a single fluorescent polymer luminescent material generally has low brightness and low efficiency. In order to solve the above problems, conventionally, high-efficiency phosphorescent polymer light-emitting materials have been used in place of fluorescent polymer light-emitting materials. However, phosphorescent high-molecular light-emitting materials have problems in mass production and high cost. In view of the above, how to solve the above problems to provide a polymer organic electroluminescence device having a high luminous efficiency of 7 200826730 and having a low cost is an important issue of the present invention. [Invention] In view of the above problems, the present invention The purpose is to provide a south molecular organic electroluminescent device with high luminous efficiency and low cost. The reason is that, in order to achieve the above object, the electroluminescent device according to the present invention comprises a substrate, a -electrode electrode, a photo electrode, and a second electrode. The first electrode is disposed on the substrate; the organic functional layer has a light-emitting layer, the light-emitting layer includes one of the first light-emitting material and the second light-emitting material; and the second electrode is disposed in the organic functional layer. on. According to the above, a polymer organic electroluminescence device according to the present invention mixes two or more kinds of luminescent materials of the same color in a light-emitting layer. Compared with the prior art, the present invention uses a complex luminescent material in the luminescent layer to have a higher luminous efficiency than the conventional single-fat material, and has a lower production cost than the _ light material, and listens to the filler. The difficulty. [Embodiment] Hereinafter, a polymer organic electroluminescent device will be described with reference to the related drawings. DESCRIPTION OF THE PREFERRED EMBODIMENTS One of the preferred embodiments of the present invention, wherein the same elements will be the same as shown in FIG. 2, according to a preferred embodiment of the present invention, a high score 8 200826730 sub-organic electroluminescent light t- 2 includes - substrate 21 - a first electrode 22, an organic B energy layer 23, and a second electrode 24. In this embodiment, the substrate 21 can be selected from at least one of a rigid substrate, a flexible substrate, a glass substrate, a plastic substrate, and a germanium substrate. The material of the plate is selected from the group consisting of polyacryl-based plastic, polymer, and glass. At least one of Shi Xi. The first electrode 22 is disposed on the substrate 21, and the first electrode is generally an anode, and the material thereof is a conductive metal oxide, and the conductive metal oxide is selected from the group consisting of indium tin oxide, aluminum zinc oxide, At least one of the indium zinc oxide and the mineral tin oxide is formed on the substrate 21 by, for example, sputtering or ion plating. The organic functional layer 23 is disposed on the first electrode 22, and may include a light-emitting layer 233 formed by, for example, spin coating, ink jet printing, immersion or showering. The light-emitting layer 233 of the embodiment is The first luminescent material and the second luminescent material comprising the same light color may be one of the three primary colors constituting the full color organic electroluminescent device. In this embodiment, the first luminescent material and the second luminescent material are common luminescent materials of one of the three primary colors, and the predetermined luminescent color is increased by mixing two luminescent materials of the same color in the luminescent layer 233. The luminous efficiency of the electromechanical excitation light device 2. For example, the first luminescent material and the second luminescent material may be selected from luminescent materials generally used to produce blue, green or red. In the present embodiment, the blue, green or red luminescent materials are respectively As shown in the following formula, but not limited to this: Formula (1) 200826730
然而，本實施例之發光層233並不限於僅包含相同光色之 —種發光材料’當然，發光層233更可包含相同光色之一 第二發光材料，以適當比例之混合達到製作高發光效率之 有機電激發光裝置2，且此高效率之有機電激發光裝置2 亦可應用多色及全彩之有機電激發光裝置中。其中，本實 施例之第一發光材料、第二發光材料與第三發光材料係為 一螢光材料，且螢光材料係選自紅色螢光材料、藍色螢光 材料及綠色螢光材料至少其中之一。 另外，本實施例之高分子有機電激發光裝置2的有機 200826730 官能層23更包含一電洞傳輸層231，其係設置於第一電極 22與發光層233之間，電洞傳輸層231之材質係可為聚乙 烯二氧硫二烯（poly 3-4-ethylenedioxythiophene，PEDOT) 以例如旋轉塗佈、喷墨列印、沉浸或喷淋等之方式形成於 第一電極22上。又，如圖3所示，有機官能層23更可包 含一電子阻擔層232，其係設置於電洞傳輸層231與發光 層233之間，使電子能有效地被阻擋於電洞傳輸層231與 發光層233之間，以與電洞形成發光激子發光，而電子阻 擋層232之設置更可有效提高有機電激發光裝置2之發光 效率。在本實施例中，電子阻擋層232之材質舉例來^係 可選自下列式所示，但不以此為限： 式（4)However, the luminescent layer 233 of the present embodiment is not limited to a luminescent material containing only the same light color. Of course, the luminescent layer 233 may further comprise a second luminescent material of the same light color, and the high proportion of light can be achieved by mixing at an appropriate ratio. The organic electroluminescent device 2 of the efficiency, and the high-efficiency organic electroluminescent device 2 can also be used in a multi-color and full-color organic electroluminescent device. The first luminescent material, the second luminescent material and the third luminescent material of the embodiment are a fluorescent material, and the fluorescent material is selected from the group consisting of a red fluorescent material, a blue fluorescent material and a green fluorescent material. one of them. In addition, the organic 200826730 functional layer 23 of the polymer organic electroluminescent device 2 of the present embodiment further includes a hole transport layer 231 disposed between the first electrode 22 and the light-emitting layer 233, and the hole transport layer 231 The material may be formed of poly 3-4-ethylenedioxythiophene (PEDOT) on the first electrode 22 by, for example, spin coating, ink jet printing, immersion or spraying. Moreover, as shown in FIG. 3, the organic functional layer 23 further includes an electron blocking layer 232 disposed between the hole transport layer 231 and the light emitting layer 233 to effectively block electrons from the hole transport layer. Between the 231 and the luminescent layer 233, illuminating excitons are formed with the holes, and the arrangement of the electron blocking layer 232 can effectively improve the luminous efficiency of the organic electroluminescent device 2. In this embodiment, the material of the electron blocking layer 232 is exemplified by the following formula, but is not limited thereto:
式（5) 11 200826730Formula (5) 11 200826730
第二電極24通常作為陰極，其材質係可為導電物質， 導電物質係選自鋁、鈣、鎂、銦、錫、錳、銅、銀、金及 其合金至少其中之一，含鎂之合金可為鎂銀合金、鎂銦合 金、鎂錫合金、鎂銻合金或鎂碲合金，利用濺鍍或離子電 鍍等方法形成於有機官能層23上。 承上所述，第一電極22與第二電極24之材質與作為 陰陽極之應用，可依據實際需求加以互換。 如圖4所示，其係顯示依據本發明較佳實施例之有機 電激發光裝置的發光效率量測比較圖，由圖中顯知，依據 本發明較佳實施例之包含第一發光材料與第二發光材料 之發光層的有機電激發光裝置相較於習知僅包含單一發 光材料之發光層的有機電激發光裝置具有更高之亮度。另 外，本實施例之具有電子阻擔層的有機電激發光裝置相較 於未具有電子阻檔層的有機電激發光裝置更有提升發光 12 200826730 效率之功用。 综上所述，因依據本發明之〜 裝置係混合相 W刀子有機電激發光 光層中。相t 一 5 一種以上的發光材料於發 更用複數發光材料於發 用磷光材.料光效率，且較使 料之困難度。 -裊作成本，並免除製作磷光材 本發:=?為舉例性，而非為限制性者。任何未脫離 之精神與_，而對其進 應包含於後附之申請賴_+。+从改域更 【圖式簡單說明】 圖 1為一顯示習知之一 圖； 種有機電激發光裝置的示意 機雷⑽ί _讀據本發明較佳實施例之一種高分子有 機電激發光裝置的示意圖； 為"具示依據本發明另一較佳實施例之一種高分 子有機電激發光裝置的示意圖；以及 量測比_。有機電激發光裝置的發光效率 元件符號說明： 1 有機電激發光裝置 有機電激發光元件 10 200826730 11 基板 12 陽極 13 有機電激發光層 14 陰極 2 高分子有機電激發光裝置 21 基板 22 第一電極 23 有機官能層 231 電洞傳輸層 232 電子阻擋層 233 發光層 24 第二電極The second electrode 24 is generally used as a cathode, and the material thereof may be a conductive material selected from at least one of aluminum, calcium, magnesium, indium, tin, manganese, copper, silver, gold and alloys thereof, and an alloy containing magnesium. The magnesium-silver alloy, the magnesium-indium alloy, the magnesium-tin alloy, the magnesium-niobium alloy or the magnesium-niobium alloy may be formed on the organic functional layer 23 by sputtering or ion plating. As described above, the materials of the first electrode 22 and the second electrode 24 and the application as the anode and the cathode can be interchanged according to actual needs. As shown in FIG. 4, it is a comparison diagram of luminous efficiency measurement of an organic electroluminescent device according to a preferred embodiment of the present invention. It is apparent from the drawings that the first luminescent material is included in accordance with a preferred embodiment of the present invention. The organic electroluminescent device of the luminescent layer of the second luminescent material has a higher brightness than the organic electroluminescent device of the conventional luminescent layer comprising only a single luminescent material. In addition, the organic electroluminescent device having the electron blocking layer of the present embodiment has the function of improving the efficiency of the light-emitting device 12 compared with the organic electroluminescent device having no electronic barrier layer. In summary, the apparatus according to the present invention is a mixed phase W-knife organic electroluminescent light-emitting layer. Phase t-5 More than one luminescent material is used in the application of a plurality of luminescent materials in the use of phosphorescent materials, light efficiency, and the difficulty of the material. - The cost of production and the elimination of the production of phosphors. The hair: =? is an example, not a limitation. Any spirit and _ that are not divorced, and its application is included in the attached application _+. 1 is a schematic diagram showing a conventional one; a schematic machine for an organic electroluminescent device (10) _ reading a polymer organic electroluminescent device according to a preferred embodiment of the present invention BRIEF DESCRIPTION OF THE DRAWINGS A schematic diagram of a polymer organic electroluminescent device according to another preferred embodiment of the present invention; and a measurement ratio_. Symbol of luminous efficiency of organic electroluminescent device: 1 organic electroluminescent device organic electroluminescent device 10 200826730 11 substrate 12 anode 13 organic electroluminescent layer 14 cathode 2 polymer organic electroluminescent device 21 substrate 22 first Electrode 23 organic functional layer 231 hole transport layer 232 electron blocking layer 233 light emitting layer 24 second electrode