九、發明說明： 【發明所屬之技術領域] 本毛明疋有關於一種有機電激發光元件及其製造方 法，且特別是有關於一種堆疊式有機電激發光元件 (Stacked Organic Electro-Luminesance Device, Stacked OLED)及其製作方法。 【先前技術】 有機電激發光元件是一種利用有機官能性材料 (orgamc functional materials )的自發光的特性來達到顯示 效果的7L件’其發光結構通常是由一對電極以及有機官能 性材料層所構成。當電流通過陽極及陰極間的區域，使電 子和電洞在有機官能性材料層内再結合而產生激子 photon)時’便可喊錢官祕材制舰其材料之 特性，而產生不同顏色之放光機制。 剧作ίΐΓί有機發光元件的製作上，習知技術採用分別 構以及藍色（B)有機發光結構，再以上述之有口 搭配’而產生全彩化效果之有機發光元 機官能性材料的衰減生命週期 也貞^有 :’其將會面臨到各色發光純度的S或是= -杜決上述醜，有研究者提出多層4加式有機發光 ri==yerstaekedQLED)，以製作高發光效上;單 色或白色有機電激發光元件。其將多個單色或多個白色有 機電激發光元件堆疊，以提高其發光效 知的多層疊加式有機發光元件之示意圖。^日^示為習 夕層疊加式有機發光元件100且有―” π圖卜此 11130、多個有機發光層140以及多固ϋ、-對電極 其中，有機發光層140彼此堆疊，且电j·生連接層150， 每層有機發光層uo之間。當電流通層150位於 時，每個有機發光層14〇中的電子間 以形成激子，並放射出可見光18〇，因此，^ 运結合 藉由多層有機發光層中之激子的加乘效果，^ f锋示， 疊加式有機發光元件刚的發光效率 ^了多層 具有單色或白光之發光效果，其:無= 【發明内容】 有鑑於此，本發明的目的就是在提供一種 電激發衫件，其可達到全彩化之需求，並能提 發光效率以及色純度。 彳之 —本發明的再一目的是提供一種堆疊式有機電激發 兀件的製作方法’其能夠製作全彩化之堆疊式有機電^發 光元件，其並具有較佳之發光效率以及色純度。 基於上述目的或其他目的，本發明提出一種堆疊式有 機電激發光元件，其包括基板、陽極層（an〇de layer)、 多個有機發光層、多個載體產生層（carHer Generati⑽ Layer，CGL)、多個反射層（ref|ecting layer)與陰極芦 (cathode layer)。其中，基板具有一第一發光區域（衍二 emitting area)、一 第二發光區域（sec〇nd emming 紙^ 1260 ll8Stwf.doc/m 以及一第二發光區域（third emitting area)。陽極層配置 於基板上。第一有機發光層配置於陽極層上。第二^機發 光層配置於第-有機發光層上。第三有機發光層配置於^ 二^機發光層上。第一載體產生層配置於第一有機發光層 與第二有機發光層之間。第二載體產生層配置於第二有^ 發光層與第三有機發光層之間。第一反射層設置於第一發 光區域内且位於基板與第一有機發光層之間。第二反射層 S置於第二發光區域内且位於第—有機發光層與第二有^ 馨發光層之間。第三反射層設置於第三發光區域内且位於第 二有機發光層與第三有機發光層之間。陰極層設 有機發光層上。 、 >在本發明之一較佳實施例中，上述之堆疊式有機電激 啦光元件例如更包括一彩色濾、光層Ιππ)， • 設置於陰極層上。 在本电明之一較佳貫施例中，上述之堆疊式有機電激 發光元件，例如更包括一電洞傳輸層（H〇le Tmnsp〇rt • Layer，HTL)，配置於陽極層與第一有機發光層之間。 在本發明之一較佳實施例中，上述之第二反射層設置 於第二發光區域内且位於第一載體產生層及第二有機發光 層之間。 …在本發明之一較佳實施例中，上述之第二反射層設置 於第二發光區域内且位於第一載體產生層及第一有機發光 層之間。 在本發明之一較佳實施例中，上述之第三反射層設置 12601為 twf.doc/m 於第三發光區域内且位於第二載體產生層及第三有機發光 層之間。 斤在本發明之-較佳實施例中，上述之第三反射層設置 於第二發光區域内且位於第二載體產生層及 層之間。 虫第在ίΐΓί一較佳實施例中，上述之第-載體產生層 人弟一載肢產生層之材質例如是三氧化鎢（W03)。 在本發明之一較佳實施例中，上述之第一反射層 二反射層與第三反射層之材質例如是選自於紹、絡、銀、 鎂及其合金所組成的群組其中之一。 ft發明之一較佳實施例中’上述之陽極層之材質例 如包括透明或不透明導電材質。 。 、 在本發明之一較佳實施例中，上 如包括透明導電材質。 層之材貝例 法，種堆4式有機電激發光元件的製作方 區域m 驟H提供—基板’其具有第一發光 :域發絲域。接著，在第一發 此二—反射層。再來，在基板上形成陽極層， 此㈣極層覆盍第_反射芦。 機發光層n在帛\ ，麵極層上形成第一有 層。再來，在光層上形成第一載體產生 後，在第二有墙第二有機發光層。之 第二載體產生層上賴2弟二載體產生層。接著’在 機發光層上形成—陰極層，其中，方二 ^、平方；弟一有機發光層與第 oc/m 1260職跑 二有機發光層之間，且位於第二發光區域之位置上 形成第二反射層，並於第二有機發糾與第三 = 之間，且位於第三發光區域之位置上更包括形成第^反ς 層。 在本發明之-較佳實施例中，上述之形成第— 發光層及第三有機發光層之製程是飾 在本發明之-較佳實施例中，上述之堆疊式有 舍光7〇件的製作方法’例如更包括於陰極層 ^ 濾光層。 /取形色 在本發明之一較佳實施例中，上述之堆疊 發光70件的製作綠，例如更包括於在陽 發光層之間形成一電洞傳輸層。 、弟有钱 斑第ί^Γ之—較佳實施例中，上述之第—載體產生層 =載肢產生層之材質例如是選自於三氧化鎢（W〇〇。 -沒發明之—健實施财，上述之第—反射層、第 二射層與弟三反射層之材質選自於鋁、 合金所組成的群組其中之一。 每及其 上述之陽極層之材質例 上述之陰極層之材質例 在本發明之一較佳實施例中 如包括透明或不透明導電材質。 在本發明之一較佳實施例中 如包括透明導電材質。 之效 10 rtwf.doc/m 之圖案化遮罩配合蒸鑛製程以形成堆疊之有機發光芦沾 構，因此可減少圖案化遮罩的數目’進而降低生產成丄了 而反射層之分層設置可提高本發明之堆疊式有機電激 元件的發光效率，並藉以提高其亮度。 X疋 為讓本發明之上述和其他目的、特徵和優點能更 易懂，下文特舉較佳實施例，並配合所附圖式，作細…、、 明如下。 ϋ、、、田过 【實施方式】 • 第一實施例 圖2繪不為本發明之較佳實施例中一種堆疊式有機命 激發光兀件的結構示意圖。請參照圖2，此堆疊式有機: 激發光元件200包括基板210、陽極層22〇、多個有機發2 ‘ 層232、234、236、多個載體產生層242、244、多個^射 層252、254、256以及陰極層260。其中，基板21〇具有 ‘ 第一發光區域212、第二發光區域214以及第三發光區域 216。％極層220配置於基板21〇上。有機發光層232配置 • 於陽極層220上。有機發光層234配置於有機發光層232 上。有機發光層236配置於有機發光層234上。載體產生 層242配置於有機發光層232與有機發光層234之間。載 月豆產生層244配置於有機發光層234與有機發光層236之 間。反射層252設置於第一發光區域212内且位於基板21〇 與有機發光層232之間。反射層254設置於第二發光區域 214内且位於有機發光層232與有機發光層234之間。反 射層256設置於第三發光區域216内且位於有機發光層 !2601^§ twf.doc/m 234與有機發光層236之間。而陰極層260設置於有機私 光層236上。 ' δ 請繼續參照圖2，基板210可以是一塑膠基板或是一 玻掏基板，而設置於基板21〇上的陽極層22〇，其材質 如是透明或不透明導電材質。且陰極層26〇之材質例如口 透明導電材質，以讓各色光292、294、296可以穿透。2 述之透明導電材質例如可選用銦錫氧化物、銦鋅氧化物、 銘辞氧化物、錢錫氧化物等，社述之不透 選用金屬或合金。 、 j 在陽極層220與陰極層鳩之間，設置了多個有機發 光層232、234、236、多個載體產生層24 ^ 射層252、m的堆叠結構。其中，有機發光Γ232 例如可以發出紅光、有機發光層234例如是發? 有機發光層236例如是發出藍光。 、 值得注意的是’本發明之堆疊式有機 = 特點在於彻各個有機_ 王 且並在各有機發光層232、234、236之Η 設置載體產生層242、244，以#帶+ @1~ 間 在一較佳實施财，載載子糾糊傳遞。 材質例如是選自於三與載咖^ 疊4:二二 有機電激發光元件是採用娜 個圖案化遮罩(未 1260 li&S twf.doc/m ΐ需圖案化遮罩(至少三個)並配合蒸鑛方 : 疋、·光，域中之各個獨立的有機發光結 15明之堆疊式有機電激發光元件200將可節 ’圖木化鮮的費用，進而降低生產成本。IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to an organic electroluminescent device and a method of manufacturing the same, and more particularly to a stacked organic electro-luminescence device (Stacked Organic Electro-Luminesance Device, Stacked OLED) and its making method. [Prior Art] An organic electroluminescent device is a 7L piece that utilizes the self-luminous properties of orgamc functional materials to achieve a display effect. The light-emitting structure is usually composed of a pair of electrodes and an organic functional material layer. Composition. When the current passes through the area between the anode and the cathode, and the electrons and holes are recombined in the organic functional material layer to generate the exciton photon), the characteristics of the material can be called to produce different colors. The light release mechanism. In the production of organic light-emitting elements, the conventional technique uses a separate structure and a blue (B) organic light-emitting structure, and then uses the above-mentioned mouth-matching to produce a full-color effect of the organic light-emitting device functional material attenuation. The life cycle is also 贞^有: 'It will face the sleek purity of the various colors of S or = - to eliminate the above ugly, some researchers have proposed multi-layer 4 plus organic light ri == yerstaekedQLED) to make high luminous efficiency; Monochrome or white organic electroluminescent elements. A schematic diagram of a multi-layer stacked organic light-emitting element in which a plurality of single-color or a plurality of white electro-mechanical excitation light elements are stacked to enhance the luminescence effect thereof. ^日为 shows the Xi layer stacked organic light-emitting element 100 and has "" π 卜 图 11130, a plurality of organic light-emitting layers 140 and multi-solid, - opposite electrodes, wherein the organic light-emitting layers 140 are stacked on each other, and a raw connecting layer 150, between each layer of the organic light-emitting layer uo. When the current-passing layer 150 is located, electrons in each of the organic light-emitting layers 14 are formed to form excitons, and emit visible light 18 〇, therefore, In combination with the multiplying effect of excitons in the multi-layer organic light-emitting layer, the light-emitting efficiency of the superimposed organic light-emitting element is multi-layered with a single-color or white light-emitting effect, which: no = [invention] In view of the above, an object of the present invention is to provide an electrically activated shirt member which can achieve the full coloring requirement and can provide luminous efficiency and color purity. A further object of the present invention is to provide a stacked type. A method for fabricating an electromechanical excitation element, which is capable of producing a full-color stacked organic electroluminescent device, which has better luminous efficiency and color purity. The present invention proposes a stacked type based on the above object or other objects. An electromechanical excitation light element comprising a substrate, an anode layer, a plurality of organic light-emitting layers, a plurality of carrier generation layers (carHer Generati (10) Layer, CGL), a plurality of reflective layers (ref|ecting layer) and a cathode (cathode layer), wherein the substrate has a first light emitting area, a second light emitting area (sec〇nd emming paper ^1260 ll8Stwf.doc/m, and a second emitting area) The anode layer is disposed on the substrate, the first organic light-emitting layer is disposed on the anode layer, and the second organic light-emitting layer is disposed on the first organic light-emitting layer, and the third organic light-emitting layer is disposed on the light-emitting layer. A carrier generating layer is disposed between the first organic light emitting layer and the second organic light emitting layer. The second carrier generating layer is disposed between the second light emitting layer and the third organic light emitting layer. The first reflective layer is disposed at the first The light-emitting region is located between the substrate and the first organic light-emitting layer. The second reflective layer S is disposed in the second light-emitting region and located between the first organic light-emitting layer and the second organic light-emitting layer. Third illumination And in the region between the second organic light-emitting layer and the third organic light-emitting layer. The cathode layer is provided on the organic light-emitting layer. In a preferred embodiment of the present invention, the stacked organic electro-optic light-emitting element For example, it further includes a color filter, a light layer Ιππ), and is disposed on the cathode layer. In one preferred embodiment of the present invention, the stacked organic electroluminescent device, for example, further includes a hole transport layer ( In a preferred embodiment of the present invention, the second reflective layer is disposed in the second light emitting region and is disposed between the anode layer and the first organic light emitting layer. Located between the first carrier-generating layer and the second organic light-emitting layer. In a preferred embodiment of the invention, the second reflective layer is disposed in the second light emitting region and between the first carrier generating layer and the first organic light emitting layer. In a preferred embodiment of the present invention, the third reflective layer is disposed 12601 as twf.doc/m in the third light emitting region and between the second carrier generating layer and the third organic light emitting layer. In a preferred embodiment of the invention, the third reflective layer is disposed within the second luminescent region and between the second carrier-generating layer and the layer. In a preferred embodiment, the material of the first carrier-generating layer of the above-mentioned first carrier-generating layer is, for example, tungsten trioxide (W03). In a preferred embodiment of the present invention, the material of the first reflective layer and the third reflective layer is, for example, one selected from the group consisting of Shao, Luo, Yin, Magnesium and alloys thereof. . In a preferred embodiment of the ft invention, the material of the anode layer described above includes, for example, a transparent or opaque conductive material. . In a preferred embodiment of the invention, the transparent conductive material is included. The method of layering, the fabrication of a type 4 organic electroluminescent device, the region m, provides a substrate s which has a first luminescence: a domain hairline. Next, the first two-reflection layer is produced. Further, an anode layer is formed on the substrate, and the (four) pole layer covers the first reflection reed. The luminescent layer n forms a first layer on the 帛\, the surface layer. Further, after the first carrier is formed on the optical layer, the second organic light-emitting layer is formed on the second wall. The second carrier generation layer is on the second carrier generation layer. Then, a cathode layer is formed on the light-emitting layer, wherein the square layer is squared, and the organic light-emitting layer is formed between the organic light-emitting layer and the first OLED layer of the oc/m 1260, and is located at the position of the second light-emitting region. The second reflective layer, and between the second organic light correction and the third=, and at the position of the third light emitting region further comprises forming a second anti-turn layer. In a preferred embodiment of the present invention, the process for forming the first light-emitting layer and the third organic light-emitting layer is in the preferred embodiment of the present invention, and the stacked type has a light-emitting element. The manufacturing method 'is further included in the cathode layer ^ filter layer. In a preferred embodiment of the present invention, the greening of the stacked light-emitting elements 70, for example, further includes forming a hole transport layer between the phosphor layers. In the preferred embodiment, the material of the first carrier-generating layer=carrier-generating layer is selected from, for example, tungsten trioxide (W〇〇. - not invented-- The material of the first-reflecting layer, the second layer and the third reflecting layer is selected from one of the group consisting of aluminum and an alloy. The cathode layer of each of the anode layers described above is as described above. The material example comprises a transparent or opaque conductive material in a preferred embodiment of the invention. In a preferred embodiment of the invention, a transparent conductive material is included. The patterned mask of 10 rtwf.doc/m Cooperating with the steaming process to form a stacked organic light-emitting reed structure, thereby reducing the number of patterned masks', thereby reducing production entanglement and layering of the reflective layer can improve the illuminating of the stacked organic electro-active elements of the present invention The above and other objects, features and advantages of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; ϋ,,,田过过【 The first embodiment FIG. 2 is a schematic structural view of a stacked organic lifetime excitation light-emitting device according to a preferred embodiment of the present invention. Referring to FIG. 2, the stacked organic: excitation light element 200 includes a substrate. 210, an anode layer 22, a plurality of organic hair 2' layers 232, 234, 236, a plurality of carrier generating layers 242, 244, a plurality of layers 252, 254, 256, and a cathode layer 260. a first light-emitting region 212, a second light-emitting region 214, and a third light-emitting region 216. The %-electrode layer 220 is disposed on the substrate 21A. The organic light-emitting layer 232 is disposed on the anode layer 220. The organic light-emitting layer 234 is disposed on the organic light-emitting layer The organic light-emitting layer 236 is disposed on the organic light-emitting layer 234. The carrier-generating layer 242 is disposed between the organic light-emitting layer 232 and the organic light-emitting layer 234. The moon-like layer 244 is disposed on the organic light-emitting layer 234 and the organic light-emitting layer. The reflective layer 252 is disposed between the substrate 21 and the organic light-emitting layer 232. The reflective layer 254 is disposed in the second light-emitting region 214 and located in the organic light-emitting layer 232 and the organic light-emitting layer 234. It The reflective layer 256 is disposed in the third light-emitting region 216 between the organic light-emitting layer 2601 § twf.doc/m 234 and the organic light-emitting layer 236. The cathode layer 260 is disposed on the organic light-transmitting layer 236. δ Please continue to refer to FIG. 2 , the substrate 210 may be a plastic substrate or a glass substrate, and the anode layer 22 设置 disposed on the substrate 21 〇 is made of a transparent or opaque conductive material, and the cathode layer 26 〇 material. For example, the transparent conductive material is used to allow the respective colors 292, 294, and 296 to penetrate. 2 The transparent conductive material may be, for example, indium tin oxide, indium zinc oxide, inscription oxide, and money tin oxide. It is said that the metal or alloy is not used. Between the anode layer 220 and the cathode layer, a plurality of organic light-emitting layers 232, 234, and 236, and a plurality of carrier-generating layers 24, 252, and m are stacked. The organic light-emitting layer 232 may emit red light, for example, the organic light-emitting layer 234, for example, the organic light-emitting layer 236, for example, emits blue light. It is worth noting that 'the stacked organic type of the present invention is characterized by the respective organic layers and the carrier generating layers 242, 244 are disposed between the respective organic light emitting layers 232, 234, and 236, with #带+ @1~ In a better implementation, the carrier is conveyed. The material is, for example, selected from the group consisting of three and a coffee carrier. 4: The two-two organic electroluminescent device is a patterned mask (not 1260 li& twf.doc/m. And in conjunction with the steaming side: 疋, · light, each of the individual organic light-emitting junctions in the field, the stacked organic electroluminescent element 200 will be able to save the cost of the wood, thereby reducing the production cost.
本發明之另-特點，則是在堆叠式有機電 的堆疊結構中，且對應第—發光區域212、第二發光^ 域214、第三發光區域216的適當位置設置反射層攻、 254、256。如此一來’各有機發光層232、234、说朝其 板210方向所發出光線（未綠示），其能夠被反射層况土、 254、256所反射。而被反射之光線會再與各有機發光声 232、234、236朝陰極層26〇方向（目視方向）所發^ 光線合成，而產生發光效率較佳之各色光292、294、296。 所以，利用反射層252、254、256的設置能夠提昇堆疊式 有機電激發光元件200的發光效率。 且Another feature of the present invention is that in the stacked organic electric stack structure, the reflective layer attack is set at an appropriate position corresponding to the first light-emitting region 212, the second light-emitting region 214, and the third light-emitting region 216, 254, 256. . As a result, the respective organic light-emitting layers 232 and 234 emit light (not shown in green) in the direction of the plate 210, which can be reflected by the reflective layer, 254, 256. The reflected light is combined with the light emitted by the respective organic light-emitting sounds 232, 234, and 236 toward the cathode layer 26 (visual direction) to produce light 292, 294, and 296 having better luminous efficiency. Therefore, the arrangement efficiency of the stacked organic electroluminescent element 200 can be improved by the arrangement of the reflective layers 252, 254, 256. And
值得注意的是，反射層252、254、256的位置是採分 層設計，且可以作適當之調整。請參照圖2，以反射層25二 256為例，在一較佳實施例中，反射層254例如是設置於 第二發光區域214内且位於載體產生層242及有機發光層 234之間。在另一實施例中，反射層254也可以設置於第 二發光區域214内且位於載體產生層242及有機發光声 232之間。 又 曰 請繼續參照圖2，反射層256例如是設置於第三發光 區域216内且位於載體產生層244及有機發光層236之 間。在另一實施例中，反射層256也可以設置於第三發光 13 r f.doc/m 區域216内且位於載體產生層244及有機發光層234之 間。此外’反射層252、254、256之材質例如是選自於铭、 鉻、銀、鎂及其合金所組成的群組其中之一。 請繼繽參照圖2 ’在本發明之一較佳實施例中，此堆 疊式有機電激發光元件200例如更包括一電洞傳輸層 270，其配置於陽極層220與有機發光層232之間，此電二 傳輸層270之材質例如選自聚乙烯二羥基^吩 (polyethylene dioxythiophene，PED0T)或聚苯乙烯續酸^ ❿（Polystyrene sulfonate，PSS)，或是為 NPB、TPD、α -NPD、 MADN等小分子有機材料，其亦可以是其他已知的電洞傳 輸材料’其作用在於幫助電洞的傳輸。 此外，如圖2所繪示之堆疊式有機電激發光元件2〇〇 例如更包括一彩色濾光層280，設置於陰極層26〇上。此 彩色濾光層280具有紅色濾光層282、綠色濾光層284以 • 及藍色濾光層286，用以將各色光292、294、290進行過 濾而輸出色純度更佳之紅光、綠光以及藍光。 • 圖3A繪示為色光未經過紅色濾光層之光譜示意圖。 圖3B繪示為色光經過紅色濾光層後之光譜示意圖。由圖2 可知，第一發光區域212中所發出之色光292，其包含有 機發光層232發出之紅光、有機發光層234發出之綠光， 以及有機發光層236發出之藍光。因此，由圖3A中光譜 可知，色光292包含了紅光、綠光以及藍光等成分。當色 光292在經過紅色濾光層282之作用後，色光292中之紅 光成分被濾出，而得到圖3B所繪示之色純度更佳之紅光 14 1260 脱— 292R。 圖4A繪示為色光未經過綠色濾光層之光譜示意圖。 圖4B繪示為色光經過綠色濾光層後之光譜示意圖。由圖2 可知，第二發光區域214中所發出之色光294，其包含有 有機發光層234發出之綠光，以及有機發光層236發出之 藍光。因此，由圖4A中之光譜可知，色光294包含了綠 光以及監光等成分。當色光294在經過綠色濾、光層284之 作用後，色光294中之綠光被濾出，而得到如圖4B所繪 _ 示之色純度更佳之綠光294G。 圖5繪示為色光經過藍色濾光層之後的光譜示意圖。 由圖2可知，第三發光區域216中所發出之色光296，其 僅包含監光成分。因此，由圖5之光譜可知，色光2%在 經過監色濾光層284之後，其所得到之藍光296B與色光 296之間並無任何差別。 • 絲上所述，本發明之堆疊式有機電激發光元件200利 用了有機發光層232、234、236之全面堆疊，而達到全彩 φ 化之效果以及得到色純度較佳之色光。其優點為只利用一 個圖案化遮罩就達到有機發光層232、234、236之堆疊， 所=可減少生產成本。此外，利用反射層252、254、 之^刀層设置，可以提高堆疊式有機電激發光元件200之發 光效率，並提高其亮度。 第二實施例 圖6A〜圖6E繪示為本發9^之較佳實施例巾—種堆叠 12601駄 twf.doc/m 式有機電激發光元件的製作方法之步驟流程示意圖。請參 照如圖6A〜圖6E所繪示之步驟，此製程是一連續製程。 首先，如圖6A所繪示，提供一基板21〇，其具有第 發光區域212、第二發光區域214以及第三發光區域 216。此基板210例如是塑膠基板或是玻璃基板。It is worth noting that the position of the reflective layers 252, 254, 256 is a mining layer design and can be suitably adjusted. Referring to FIG. 2, the reflective layer 25 256 is taken as an example. In a preferred embodiment, the reflective layer 254 is disposed in the second light-emitting region 214 and between the carrier-generating layer 242 and the organic light-emitting layer 234. In another embodiment, the reflective layer 254 can also be disposed within the second light emitting region 214 and between the carrier generating layer 242 and the organic light emitting 232. Further, referring to FIG. 2, the reflective layer 256 is disposed, for example, in the third light-emitting region 216 between the carrier-generating layer 244 and the organic light-emitting layer 236. In another embodiment, the reflective layer 256 can also be disposed within the third luminescent region 13 r f.doc/m region 216 and between the carrier generating layer 244 and the organic light emitting layer 234. Further, the material of the reflective layer 252, 254, 256 is, for example, one selected from the group consisting of melamine, chromium, silver, magnesium, and alloys thereof. Referring to FIG. 2, in a preferred embodiment of the present invention, the stacked organic electroluminescent device 200 further includes a hole transport layer 270 disposed between the anode layer 220 and the organic light-emitting layer 232. The material of the second transfer layer 270 is selected, for example, from polyethylene dioxythiophene (PEDOT) or polystyrene sulfonate (PSS), or NPB, TPD, α-NPD, Small molecular organic materials such as MADN, which may also be other known hole transport materials, are intended to aid in the transmission of holes. In addition, the stacked organic electroluminescent device 2, as shown in FIG. 2, for example, further includes a color filter layer 280 disposed on the cathode layer 26A. The color filter layer 280 has a red filter layer 282, a green filter layer 284 and a blue filter layer 286 for filtering the color lights 292, 294, and 290 to output red and green colors with better color purity. Light and blue light. • Figure 3A is a schematic diagram showing the spectrum of the colored light without passing through the red filter layer. FIG. 3B is a schematic diagram showing the spectrum of the colored light after passing through the red filter layer. As can be seen from Fig. 2, the color light 292 emitted from the first light-emitting region 212 includes red light emitted from the organic light-emitting layer 232, green light emitted from the organic light-emitting layer 234, and blue light emitted from the organic light-emitting layer 236. Therefore, as can be seen from the spectrum in Fig. 3A, the color light 292 contains components such as red light, green light, and blue light. When the color light 292 passes through the red filter layer 282, the red light component of the color light 292 is filtered out to obtain the red light 14 1260 off-292R of the color purity shown in Fig. 3B. FIG. 4A is a schematic diagram showing the spectrum of the color light without passing through the green filter layer. FIG. 4B is a schematic diagram showing the spectrum of the colored light after passing through the green filter layer. As can be seen from FIG. 2, the color light 294 emitted in the second light-emitting region 214 includes green light emitted by the organic light-emitting layer 234 and blue light emitted from the organic light-emitting layer 236. Therefore, as is clear from the spectrum in Fig. 4A, the colored light 294 contains components such as green light and light. When the color light 294 passes through the green filter and the light layer 284, the green light in the color light 294 is filtered out, and the green light 294G having a better color purity as shown in Fig. 4B is obtained. FIG. 5 is a schematic diagram showing the spectrum after the color light passes through the blue filter layer. As can be seen from Fig. 2, the color light 296 emitted in the third light-emitting region 216 contains only the light-guiding component. Therefore, from the spectrum of Fig. 5, after the color light 2% passes through the color filter layer 284, there is no difference between the blue light 296B and the color light 296. • As described above, the stacked organic electroluminescent device 200 of the present invention utilizes a comprehensive stack of organic light-emitting layers 232, 234, and 236 to achieve full color φ effect and obtain color light of better color purity. This has the advantage of achieving a stack of organic light-emitting layers 232, 234, 236 using only one patterned mask, which reduces production costs. Further, by using the reflective layers 252, 254 and the blade layer, the light-emitting efficiency of the stacked organic electroluminescent device 200 can be improved and the brightness thereof can be improved. Second Embodiment FIG. 6A to FIG. 6E are schematic diagrams showing the steps of a method for fabricating a 12601 駄 twf.doc/m type organic electroluminescent device according to a preferred embodiment of the present invention. Please refer to the steps as shown in FIG. 6A to FIG. 6E. This process is a continuous process. First, as shown in Fig. 6A, a substrate 21 is provided having a first light emitting region 212, a second light emitting region 214, and a third light emitting region 216. The substrate 210 is, for example, a plastic substrate or a glass substrate.
接著，如圖6B所繪示，在第一發光區域212上形成 反射層252。此反射層設置於第一發光區域212内且 位於基板210上。形成反射層252之方法例如是利用一圖 案化遮罩310配合蒸鍍製程320，而將反射層252形成於 基板210上的第-發光區域212内。在一實施例中，反射 層252之材質例如是選自於銘、絡、銀、鎮及其合金所組 成的群組其中之一。 再來，如圖6C輯示，在基板21〇上形成陽極層22〇, 此陽極層22G覆蓋反射層252。形成陽極層22()之方 如疋^用雜法使陽極層22G全面地形成於基板21〇上，Next, as shown in FIG. 6B, a reflective layer 252 is formed on the first light emitting region 212. The reflective layer is disposed in the first light emitting region 212 and on the substrate 210. The method of forming the reflective layer 252 is performed by, for example, using a patterned mask 310 in conjunction with the evaporation process 320 to form a reflective layer 252 in the first light-emitting region 212 on the substrate 210. In one embodiment, the material of the reflective layer 252 is, for example, one selected from the group consisting of: Ming, Luo, Yin, Zhen and their alloys. Further, as illustrated in FIG. 6C, an anode layer 22A is formed on the substrate 21, and the anode layer 22G covers the reflective layer 252. Forming the anode layer 22 () such that the anode layer 22G is integrally formed on the substrate 21 by a hybrid method,
ί:Ξ:_:Φ陽極層220之材質例如包括透明或不透明 材貝/、中不透明導電材質例如是金屬、合金等， ，明導電，質例如是銦錫氧化物、崎氧化物、料 物、錫錫氧化物等。 接著，如圖6D所繪示，在陽極層22〇上形 先層232。形成有機發光層232的方法例如是利用―二 =遮罩312配合蒸鍍製程33〇，將有機材料全面地形= 上。在—實施例中，更可在陽極層220與有機 S光層之間先形成一電洞傳輸層270，以有利於電洞Ξ: Ξ: _: Φ anode layer 220 material includes, for example, transparent or opaque material /, medium opaque conductive material such as metal, alloy, etc., conductive, such as indium tin oxide, samarium oxide, material , tin tin oxide and so on. Next, as shown in Fig. 6D, a layer 232 is formed on the anode layer 22A. The method of forming the organic light-emitting layer 232 is, for example, using a "two-mask" 312 in conjunction with an evaporation process 33" to uniformly topography the organic material. In an embodiment, a hole transport layer 270 may be formed between the anode layer 220 and the organic S-light layer to facilitate the hole.
12601綠 wf,doc/m 在陽極層220和有機發光層232之間進行傳輸。 之後，如圖6E所繪示，在有機發光層232上形成載 體產生層242，在載體產生層242上形成有機發光層234， 在有機發光層234上形成載體產生層244，在載體產生層 244上形成有機發光層236，以及在有機發光層236上形^ 陰極層260，其中，於有機發光層232與有機發光層⑽ 之間，且位於第二發光區域214之位置上更包括形成反射 層，並於有機發光層234與有機發光層236之間，且 位於第二發光區域216之位置上更包括形成反射層256。 關於載體產生層242、244、反射層252、254、250以及陰 極層260之材質已於第一實施例中所述，在此不再予以重 述。、而形成載體產生層242、244之方法與圖6D所描述之 乂成有枝舍光層232的方法類似，也就是可以利用一圖案 化遮罩（未繪示）配合蒸鍍製程而製得。另外，反射層254、 256之形成的方法也類似如圖6B中所描述製造反射層252 的方法一樣，利用不同的圖案化遮罩（未繪示）配合蒸鍍 製程320而製得。 /值得注意的是，在本發明之一較佳實施例中，上述之 形$有機發光層232、有機發光層234及有機發光層236 ^製程是使用相同之圖案化遮罩312。因此，本發明之堆 宜式有機電激發光元件200將可節省圖案化遮罩的費用， 7不像習知的全彩化有機電激發光元件一樣，需要利用不 同之圖案化遮罩，並配合蒸鍍方式而定義出不同發光區域 中之各個有機發光結構。 17 1260 脱 twf.doc/m 請再參照圖6E，於陰極層28〇上更可以形成一彩色濾 光層280 ’其具有紅色濾光層282、綠色濾光層284以及藍 色濾光層286 ’利用彩色濾、光層28〇將可以進一步得到^ 佳色純度之色光。而形成彩色濾光層28〇之方法例如是印 刷法（print method)或噴墨法（Inkjet)。 綜上所述，本發明之堆疊式有機電激發光元件具有下 列優點： (1 )本發明之堆疊式有機電激發光元件利用了有機 ^光層之全面堆疊，而可麵全彩化之效果以及得到色純 ϋ土之色光’且其利用相同之圖案化料配合蒸鑛製程 ^形成堆疊之有機發光層結構，因此可減少圖案化遮罩的 數目，進而降低生產成本。 ⑵_反射層之分層設置，可提高本發明 式有機電激發*元件的發級率，吨轉亮度。 雖然本發明已啸佳實關聽如上，、= :定本發明，任何熟習此技藝者，在 ::: =圍内’當可作些許之更動與潤飾’因此本發明 軌圍當視後附之申請專利範圍所界定者為 ’、叹 【圖式簡單說明】 圖。圖1繪不為習知的多層疊加式有機發光元件之示音 圖2繪不為本發明之較佳實施例 激發光元件的結構示意圖。 種堆宜式有機電 圖3Α綠示為色絲經過紅色濾光層之光請示意 圖 18 1260185 twf.doc/m 圖3B繪示為色光經過紅色濾光層後之光譜示意圖。 圖4A繪示為色光未經過綠色濾光層之光譜示意圖。 圖4B繪示為色光經過綠色滤光層後之光譜示意圖。 圖5繪示為色光經過藍色濾光層之後的光譜示意圖。 圖6A〜圖6E繪示為本發明之較佳實施例中一種堆疊 式有機電激發光元件的製作方法之步驟流程示意圖。 【主要元件符號說明】 100:多層疊加式有機發光元件 110 ··基板 120、130 :電極 140 :有機發光層 150 :電性連接層 160 :電子 170 :電洞 180 :可見光 200 :堆疊式有機電激發光元件 210 :基板 212 :第一發光區域 214 :第二發光區域 216 :第三發光區域 220 :陽極層 232、234、236 :有機發光層 242、244 :載體產生層 252、254、256 :反射層 19 1260撕 twf.doc/m 260 :陰極層 270 :電洞傳輸層 280 :彩色濾光層 282 :紅色濾光層 284 :綠色濾光層 286 :藍色濾光層 292、294、296 :色光 292R :紅光 294G :綠光 296B :藍光 310、312 ··圖案化遮罩 320、330 ··蒸鍍製程12601 green wf, doc/m is transferred between the anode layer 220 and the organic light-emitting layer 232. Thereafter, as shown in FIG. 6E, a carrier generation layer 242 is formed on the organic light-emitting layer 232, an organic light-emitting layer 234 is formed on the carrier-generating layer 242, and a carrier-generating layer 244 is formed on the organic light-emitting layer 234. The organic light-emitting layer 236 is formed thereon, and the cathode layer 260 is formed on the organic light-emitting layer 236, wherein the reflective layer is further formed between the organic light-emitting layer 232 and the organic light-emitting layer (10) and located at the second light-emitting region 214. And forming a reflective layer 256 between the organic light-emitting layer 234 and the organic light-emitting layer 236 and located at the second light-emitting region 216. The materials regarding the carrier generating layers 242, 244, the reflecting layers 252, 254, 250 and the cathode layer 260 have been described in the first embodiment and will not be repeated here. The method of forming the carrier generating layers 242, 244 is similar to the method of forming the lighted layer 232 as described in FIG. 6D, that is, it can be obtained by using a patterned mask (not shown) in combination with the evaporation process. . In addition, the method of forming the reflective layers 254, 256 is similar to the method of fabricating the reflective layer 252 as described in Figure 6B, using different patterned masks (not shown) in conjunction with the evaporation process 320. / It is noted that, in a preferred embodiment of the present invention, the above-described pattern of the organic light-emitting layer 232, the organic light-emitting layer 234, and the organic light-emitting layer 236 is formed using the same patterned mask 312. Therefore, the stacked organic electroluminescent device 200 of the present invention can save the cost of the patterned mask, 7 unlike the conventional full-color organic electroluminescent device, it is necessary to utilize different patterned masks, and Each of the organic light-emitting structures in different light-emitting regions is defined in accordance with the vapor deposition method. 17 1260 twf.doc/m Referring again to FIG. 6E, a color filter layer 280 can be formed on the cathode layer 28', which has a red filter layer 282, a green filter layer 284, and a blue filter layer 286. 'Using the color filter and the light layer 28 〇 will further obtain the color light of the good color purity. The method of forming the color filter layer 28 is, for example, a print method or an ink jet method (Inkjet). In summary, the stacked organic electroluminescent device of the present invention has the following advantages: (1) The stacked organic electroluminescent device of the present invention utilizes the overall stacking of organic light layers, and the effect of full coloring can be achieved. And the color light of the pure bauxite is obtained, and the same patterned material is used in combination with the steaming process to form the stacked organic light emitting layer structure, thereby reducing the number of patterned masks and further reducing the production cost. (2) The layered arrangement of the reflective layer can improve the emission rate and the brightness of the organic electro-excitation device of the present invention. Although the present invention has been heard as above, = = to determine the invention, anyone who is familiar with the art, in the::: = inside the 'when it can make some changes and retouching', therefore the track of the invention is attached The definition of the scope of patent application is ', sigh [simple description of the diagram] map. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing a structure of a multi-layered stacked organic light-emitting element which is not a conventional embodiment of the present invention. Figure 3: Green is shown as a color through the red filter layer. Figure 18 1260185 twf.doc/m Figure 3B shows the spectrum after the color light passes through the red filter layer. FIG. 4A is a schematic diagram showing the spectrum of the color light without passing through the green filter layer. FIG. 4B is a schematic diagram showing the spectrum of the colored light after passing through the green filter layer. FIG. 5 is a schematic diagram showing the spectrum after the color light passes through the blue filter layer. 6A-6E are schematic flow charts showing the steps of a method for fabricating a stacked organic electroluminescent device according to a preferred embodiment of the present invention. [Description of main component symbols] 100: Multi-layer stacked organic light-emitting element 110 · · Substrate 120, 130 : Electrode 140 : Organic light-emitting layer 150 : Electrical connection layer 160 : Electron 170 : Hole 180 : Visible light 200 : Stacked organic electricity Excitation light element 210: substrate 212: first light-emitting region 214: second light-emitting region 216: third light-emitting region 220: anode layer 232, 234, 236: organic light-emitting layer 242, 244: carrier-generating layer 252, 254, 256: The reflective layer 19 1260 tears twf.doc/m 260 : cathode layer 270 : hole transport layer 280 : color filter layer 282 : red filter layer 284 : green filter layer 286 : blue filter layer 292 , 294 , 296 :Color 292R : Red 294G : Green 296B : Blue light 310 , 312 · · Patterned mask 320 , 330 · · Evaporation process
2020