1304437 九、發明說明： 發明領域 本發明係有關一種有機電致發光元件及其製造方法。 發明背景 一種有機電致發光元件(後文稱作為有機EL元件)係經 由於諸如玻璃基材之透明基材主要表面上，以下述順序沉 積下列各層而形成：由諸如氧化銦錫（後文稱之為IT〇)之導 1〇電材料製成之透明第一電極層，包括具有有機發光材料之 灸光層之一有機功能層，以及由諸如I呂或鎮等金屬製成之 弟—電極層。 該有機功能層包括多層薄膜，且係經由以下述順序沉 積一正電洞注入層、一正電洞傳輸層、一發光層及一電子 15注入層於該第一電極層上所組成。 +當直流電場施加於該第-電極層與該第二電極層間 時’由該第-電極層注人之正钱與由該第二電極層注入 之電子晴光層復合’於該發光層之發光材料接‘來自 該復合之能量而發光，以及來自發光層之光係由該基材所 提取或該紐之_賴取。此财機扯元件為自將光 元件’其能見度絕佳’可於低減伏特至數十伏 X 低電壓驅動，可形成包括驅動電路之重量較輕。寸°此 20 13 〇443 7 物組成之情況，前者稱作為低分子量有機電EL元件，後者 %作為高分量EL元件。以低分子量有機EL元件為例，經由 使用氣相沉積方法，藉此氣相沉積低分子量化合物，形成 有核1功此層。以高分子量EL元件為例，高分子量化合物溶 解於有機/合劑，接著經由使用溶液之沉積方法，諸如旋涂 法而沉積所得溶液於第—電極層上，因而形成—有機功能 10 15 20 朴主於有機功能層當中，以正電洞注人層材料係由諸如敗 =青，之低分子量化合物製成為例，當正電洞注入層沉積 日^田外來物質黏著於第—電極層上時，該外來物質係作 為第一電極層之遮罩。換言之，當由低分子量化合物製成 之正電洞注入層係經由使用氣相沉積法形成時，該外來物 質係作為沉積材料流之遮罩。如此，於外來物質與第一材 料層彼此接觸之部分及其附近’不形成正電洞注入層邙 =，為形成正電洞注人層之缺陷部分。結果，正電餘入 杂光層之效率低劣，且像素之發光效率低劣。 此外’因正電洞注入層之位置係相鄰於該第一電極 層’故當缺陷部分諸如前述缺陷部分係形成於正電洞注入 層時’於缺陷部分，第-電極層與第二電極層彡 成短路）。 ’ 以正電洞注入層材料係由諸如導電聚合物之高分子量 化合物製成之情況下’因正電洞注入層可藉沉積高分子量 化合物溶液而沉積，即使外來物質係黏著於第一電極層上 亦如此，該溶液覆蓋外來物質。結果，於正電洞注入層之 6 1304437 薄膜之缺陷、或第一電極層與第二電極層間之短路變成難 以發生。但具有可用於正電洞注入層之特性之高分子量化 合物之類別有限。 此外，因用於含高分子量化合物之正電洞注入層之材 5 料難以純化，材料之雜質含量高，結果導致正電洞注入層 之正電洞注入能力不安定d此外，高分子量化合物於前述 材料之分子量分佈係因製造批次而異；如此當形成多個有 機EL元件時，個別有機EL元件之正電洞注入層之正電洞注 入能力不穩定。 10 更進一步，由高分子量化合物製成之薄膜容易於薄膜 中含有溶劑以及吸收水分；如此出現有機EL元件之儲存安 定性不足，有機EL元件因溶劑及水分而劣化之問題。 【發明内容】 發明概要 15 本發明提供一種可克服前文引述用來舉例說明之各項 問題之方法。 根據本發明之一種有機EL元件包括彼此相對設置之第 一電極層及第二電極層；以及一含有有機化合物且由該第 一電極層與第二電極層所夾置之一有機功能層，該有機功 20 能層包括設置與該第一電極層接觸之一正電洞注入層，該 正電洞注入層包括熱解低分子量化合物，該熱解低分子量 化合物係可溶於有機溶劑且具有正電洞注入性質。 根據本發明之一種製造有機EL元件之方法，包括形成 一第一電極層於一基材上；於該第一電極層上形成含有機 1304437 化合物之一有趟Αμ 二電極層，層；以及於該有機功能層上形成1 接觸之正C力能層包括形成—與該第1極層 含有熱解低分子旦^形成該正電洞注人層包括製傷1 溶劑，且具有物之紐，該化合物可溶解於有梢 電極層上。/入性質’以及設置該溶液於該第一 圖式簡單說明 弟1圖為略圖顯示根 意剖面圖。 又種有枝EL兀件之示 10 15 【】 詳細說明 法之碎附圖說明根據本發明之有機证轉及其製 透二:之==^^ 土何2，以及由諸如IT〇等導 ，又置於基材2上之第_電極層％ γ、且 諸如滅鑛方法等沉積方法製成。 由使用 ;第电極層3上’形成—正電洞注入層心 入層罐由可溶於有機溶劑 销注 子量化合物製成。此種^正电洞主入性質之低分 種低刀子量化合物之分子併 1〇:或以下。低分子量化合物為具有加熱式分解：為 熱解特性之化合物，較佳係 刀解換吕之 熱解。 為如5〇〇以以下之相對低溫 至於此種低分子量化合物 例如有可溶於有機溶劑之 20 1304437 酞花青衍生物。此種可溶性酞花青衍生物可以如下通式表 小°1304437 IX. Description of the Invention: Field of the Invention The present invention relates to an organic electroluminescent device and a method of fabricating the same. BACKGROUND OF THE INVENTION An organic electroluminescence element (hereinafter referred to as an organic EL element) is formed by depositing the following layers on a main surface of a transparent substrate such as a glass substrate in the following order: by, for example, indium tin oxide (hereinafter referred to as It is a transparent first electrode layer made of a conductive material, including an organic functional layer of a moxibustion layer having an organic luminescent material, and a brother made of a metal such as Ilu or a town. Floor. The organic functional layer comprises a multilayer film and is formed by depositing a positive hole injection layer, a positive hole transport layer, a light emitting layer and an electron 15 injection layer on the first electrode layer in the following order. + when a DC electric field is applied between the first electrode layer and the second electrode layer, 'the positive electrode injected from the first electrode layer and the electronic clear layer injected from the second electrode layer are combined to emit light on the light emitting layer The material is illuminated by the energy of the composite, and the light from the luminescent layer is extracted from the substrate or taken from. The financial component is a self-contained optical component whose visibility is excellent, and can be driven at a low voltage to a few tens of volts and a low voltage, and can be formed to be light in weight including a driving circuit. In the case of the composition of the composition, the former is referred to as a low molecular weight organic EL element, and the latter is referred to as a high component EL element. Taking a low molecular weight organic EL device as an example, a low molecular weight compound is vapor-deposited by using a vapor deposition method to form a nucleus. Taking a high molecular weight EL element as an example, a high molecular weight compound is dissolved in an organic/mixture, and then the resulting solution is deposited on the first electrode layer by a deposition method using a solution such as spin coating, thereby forming an organic function 10 15 20 In the organic functional layer, the positive hole injection layer material is made of a low molecular weight compound such as sin = green, and when the positive hole injection layer is deposited, the foreign matter adheres to the first electrode layer. This foreign substance serves as a mask for the first electrode layer. In other words, when a positive hole injection layer made of a low molecular weight compound is formed by using a vapor deposition method, the foreign matter system serves as a mask for the flow of the deposition material. Thus, in the portion where the foreign matter and the first material layer are in contact with each other and the vicinity thereof, the positive hole injection layer 邙 = is not formed, and the defective portion of the positive hole injection layer is formed. As a result, the efficiency of the positive charge remaining in the stray layer is inferior, and the luminous efficiency of the pixel is inferior. Further, 'because the position of the positive hole injection layer is adjacent to the first electrode layer', when the defect portion such as the aforementioned defect portion is formed in the positive hole injection layer, the defect portion, the first electrode layer and the second electrode The layer is short-circuited). 'In the case where the positive hole injection layer material is made of a high molecular weight compound such as a conductive polymer, 'the positive hole injection layer can be deposited by depositing a high molecular weight compound solution, even if the foreign substance adheres to the first electrode layer. The same is true for the solution, which covers the foreign matter. As a result, the defect of the film of the 6 1304437 film in the positive hole injection layer or the short circuit between the first electrode layer and the second electrode layer becomes difficult to occur. However, there are only a limited number of types of high molecular weight compounds which can be used for the characteristics of the positive hole injection layer. In addition, since the material for the positive hole injection layer containing the high molecular weight compound is difficult to purify, the impurity content of the material is high, and as a result, the positive hole injection ability of the positive hole injection layer is unstable. In addition, the high molecular weight compound is The molecular weight distribution of the foregoing materials varies depending on the manufacturing lot; thus, when a plurality of organic EL elements are formed, the positive hole injection ability of the positive hole injection layer of the individual organic EL elements is unstable. Further, a film made of a high molecular weight compound is likely to contain a solvent and absorb moisture in the film; in this case, the storage stability of the organic EL element is insufficient, and the organic EL element is deteriorated by the solvent and moisture. SUMMARY OF THE INVENTION The present invention provides a method that overcomes the problems exemplified above for exemplification. An organic EL element according to the present invention includes a first electrode layer and a second electrode layer disposed opposite to each other; and an organic functional layer containing an organic compound and sandwiched by the first electrode layer and the second electrode layer, The organic work 20 energy layer includes a positive hole injection layer disposed in contact with the first electrode layer, the positive hole injection layer including a pyrolytic low molecular weight compound which is soluble in an organic solvent and has a positive Hole injection properties. A method of fabricating an organic EL device according to the present invention, comprising: forming a first electrode layer on a substrate; forming a layer containing a bismuth-electrode layer of the compound 1304437 on the first electrode layer; Forming a contact positive C energy layer on the organic functional layer includes forming a heat-decomposing low molecular weight with the first electrode layer, forming the positive hole injection layer, including a damage 1 solvent, and having a material, The compound is soluble in the tip electrode layer. /Into the nature' and the setting of the solution in the first figure is a brief description of the brother 1 is a schematic view showing the root profile. Further description of the EL element of the branch 10 15 [] Detailed description of the broken figure illustrates the organic certificate according to the present invention and its system 2: ==^^ 土何2, and by such as IT〇 Further, it is placed on the first electrode layer % γ on the substrate 2, and is formed by a deposition method such as a mineralization method. By using; forming on the first electrode layer 3 - positive hole injection layer, the canister is made of a compound which is soluble in an organic solvent. This kind of positive hole is the main component of the low-knocking compound with a low-knife amount of compound and 1〇: or below. The low molecular weight compound is a compound having a thermal decomposition property: a pyrolysis property, and is preferably a pyrolysis solution. It is a relatively low temperature such as 5 Torr. As for such a low molecular weight compound, for example, there is a 20 1304437 phthalocyanine derivative which is soluble in an organic solvent. Such a soluble phthalocyanine derivative can be expressed as follows:
PP
上示通式中，Me表示金屬原子諸如Al、Si、Ti、V、 5 Cr、Μη、Fe、Co、Ni、Cu、Zn、Ga、Ge、Ru、Rh、Pd、 In、Sn或Pt。1^表示可具有取代基之烧基、氫原子、鹵原子、 羥基、-OR3、-SR3、-SeR3、-TeR3、-OSiR4R5R6、-〇GeR4R5R6 或-〇p〇r7r8。r3表示可具有一取代基之烧基、可具有一取 代基之烷氧基、可具有一取代基之環烷基、或聚醚基。r4、 10 R5及R6可彼此相同或相異，且表示可具有一取代基之環烷 基、可具有一取代基之芳基、可具有一取代基之烷氧基、 可具有一取代基之芳氧基或聚醚基、羥基或氫原子。以7及 R8可彼此相同或相異且表示可具有一取代基之烷基、可具 有一取代基之環烷基或可具有一取代基之芳基。 15 R2表示可具有一取代基之烷基、可具有一取代基之烷 氧基、可具有一取代基之雜環基、_原子、硝基、氰基或 磺酸根。 1304437 於具有諸如通式所示化學結構之酞花青衍生物中，取 代基Rl易於加熱時分解，取代基㈣別係促成溶解於有機 溶劑之=解性質。換言之，比較諸如敗花青銅之醜花青化 合物，刚述酉太花青衍生物可於較低溫度分解且可溶解於有 5 機溶劑。 正電洞注入層4之形成方式可經由溶解諸如前述酞花 青何生物等低分子量化合物於有機溶劑，來製備有機溶 液接著將该有機溶液使用諸如旋塗法之沉積方法而塗覆 於該第-電極層上，進一步接著乾燥來去除溶劑。 10 於正電洞注入層4設置一正電洞傳輸層5。正電洞傳輸 層5包括正電洞傳輸性質絕佳之材料，諸如NPB (N，N，-二(萘 小基)-N，N’-二苯基-聯苯胺）、MTDATA (4,4，，4，，—參(3_甲基 苯基苯基胺基)三苯基胺、TPD (N，N，_二苯基_n，n，_二(3_甲 基苯基⑷，-聯苯-4,4，_二胺），且可經由使用諸如氣相沉積 15 法等沉積方法製成。 於正電洞傳輸層5設置一發光層6。該發光層6包括一種 具有發光特性之材料諸如Alq3(參(8_羥基喳啉)鋁），且可經 由使用諸如氣相沉積法等沉積方法製成。 好於發光層6上，設置-電子注入層7。電子注入層7包括 氧化H 1可使用諸如氣相沉積法等沉積方法製成。經由 以所述順序形成正電洞注入層4、正電洞傳輪層5、發光層6 及琶子，主入層7，組成一有機功能層§。 〃於電子注入層7上’設置一第二電極層9。第二電極層9 係由諸如鋁、鋁/鋰合禽、鎂/銦合金及鎂/銀合金等導電材 1304437 料製成，可經由使用諸如氣相沉積方法等沉積方法製成。 於具有前述組配結構之一種有機EL元作中，當電場施 加於第-電極詹肖第二電極層間日寺，由第一電極層 正電洞與由第二電極層注入之電子於發光層復合，藉此發 5光層發光。當第一電極層與第二電極層短路時，短:部: 及其附近藉短路產生之焦耳熱加熱，以及由於該熱，於二 電洞注入層之低分子量化合物被分解及氣化。換言之，备 正電洞注入層所含之低分子量化合物為酞花青衍生物時: 前述通式之11!取代基部分分解及氣化。結果，短路附近之 1〇正電洞注入層氣化，體積膨脹，因此短路的第一電極層與 第二電極層分離。換言之，於具有前述組配結構之一種有 機EL元件中，即使第一電極層與第二電極層短路，當電場 係施加於第一電極層與第二電極層間時，正電洞注入層被 加熱，以及於相對低溫分解而膨脹，因此短路部分可自行 15回復其功.能。此外，因可取得廉價高純度酞花青衍生物， 故有機EL元件之製造成本可下降。 丽述正電洞注入層可經由塗覆低分子量化合物於一第 一電極層上而形成；如此，即使前述物質沾黏於第一電極 層上，當覆蓋時，可形成正電洞注入層。結果，於外來物 20質與第一電極層彼此接觸的部分及其附近，變成難以形成. 正電洞注入層之缺陷部分。此外，根據前述塗覆方法，比 較於薄膜使用氣相沉積之沉積方法，可防止於薄膜形成針 孔。如此，第一電極層與第二電極層間變成難以發生短路。 此外，含有低分子量化合物之薄膜容易去除殘餘溶劑及所 11 1304437 吸收之水分；如此可獲得穩定性高之有機EL元件。 可用於正電洞注入層之低分子量化合物非僅限於可溶 性酜花青衍生物。舉例言之，可溶性萘花青衍生物、可溶 性花青衍生物及可溶性多官能胺衍生物可用作為正電洞注 5 入層之材料。至於多官能胺衍生物，可使用諸如三苯基胺 衍生物之芳基胺衍生物。 此外，非僅限於正電洞注入層係由前述酜花青衍生物 形成之例，正電洞注入層可含有正電洞注入性質絕佳之化 合物作為摻雜劑。 10 有機EL元件所含之有機功能層只要具有含有至少一種 正電洞注入層之結構，則該有機功能層非僅限於諸如前述 之四層結構。例如，有機功能層可具有由一正電洞注入層、 一正電洞傳輸層、一發光層、一電子傳輸層及一電子注入 層所組成之一種五層結構。 15 根據本發明之有機EL元件，其包括第一及第二電極層 彼此相對，以及包括一有機功能層含有有機化合物及由該 第一電極層與第二電極層所夾置，該有機功能層包括正電 洞注入層設置與該第一電極層相鄰，該正電洞注入層包括 一種可溶於有機溶劑之熱解低分子量化合物，其具有正電 20 洞注入性質，以第一電極層及第二電極層經由正電洞注入 層之缺陷部分彼此接觸之情況為例，當因短路造成之焦耳 熱分解且膨脹該正電洞注入層時，因正電洞注入層係與第 一電極層接觸，故該第一電極層與該第二電極層可被有效 隔離。因而，可達成短路部分之自行修復。In the above formula, Me represents a metal atom such as Al, Si, Ti, V, 5 Cr, Μη, Fe, Co, Ni, Cu, Zn, Ga, Ge, Ru, Rh, Pd, In, Sn or Pt. 1 is a group which may have a substituent, a hydrogen atom, a halogen atom, a hydroxyl group, -OR3, -SR3, -SeR3, -TeR3, -OSiR4R5R6, -GeR4R5R6 or -〇p〇r7r8. R3 represents an alkyl group which may have a substituent, an alkoxy group which may have a substituent, a cycloalkyl group which may have a substituent, or a polyether group. R4, 10 R5 and R6 may be the same or different from each other, and represent a cycloalkyl group which may have a substituent, an aryl group which may have a substituent, an alkoxy group which may have a substituent, and may have a substituent. An aryloxy or polyether group, a hydroxyl group or a hydrogen atom. 7 and R8 may be the same or different from each other and represent an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent or an aryl group which may have a substituent. And R 2 represents an alkyl group which may have a substituent, an alkoxy group which may have a substituent, a heterocyclic group which may have a substituent, an atom, a nitro group, a cyano group or a sulfonate group. 1304437 In the case of a phthalocyanine derivative having a chemical structure such as a general formula, the substituent R1 is easily decomposed upon heating, and the substituent (4) is promoted to dissolve in an organic solvent. In other words, comparing ugly cyanine compounds such as sapphire bronze, the saponin derivative can be decomposed at a lower temperature and soluble in a solvent. The positive hole injection layer 4 can be formed by dissolving a low molecular weight compound such as the aforementioned phthalocyanine in an organic solvent to prepare an organic solution, and then applying the organic solution to the first layer using a deposition method such as spin coating. On the electrode layer, it is further dried to remove the solvent. 10 A positive hole transport layer 5 is disposed in the positive hole injection layer 4. The positive hole transport layer 5 includes a material having excellent positive hole transport properties such as NPB (N,N,-bis(naphthalene small)-N,N'-diphenyl-benzidine), MTDATA (4,4) ,,4,,-(3_methylphenylphenylamino)triphenylamine, TPD (N,N,_diphenyl-n,n,_bis(3-methylphenyl(4), -biphenyl-4,4,diamine), and can be produced by using a deposition method such as a vapor deposition method 15. A light-emitting layer 6 is provided on the positive hole transport layer 5. The light-emitting layer 6 includes a light-emitting layer A material of a characteristic such as Alq3 (g (8-hydroxyporphyrin) aluminum) can be produced by using a deposition method such as a vapor deposition method. On the light-emitting layer 6, an electron injection layer 7 is provided. The electron injection layer 7 The oxidation H 1 may be formed using a deposition method such as a vapor deposition method. By forming the positive hole injection layer 4, the positive hole transfer layer 5, the light-emitting layer 6, and the die, the main entry layer 7, Forming an organic functional layer § “Setting a second electrode layer 9 on the electron injection layer 7. The second electrode layer 9 is made of conductive materials such as aluminum, aluminum/lithium agar, magnesium/indium alloy, and magnesium/silver alloy. Material 1304437 It can be produced by using a deposition method such as a vapor deposition method. In an organic EL element having the aforementioned composition structure, when an electric field is applied to the first electrode of the second electrode layer of the first electrode, the first electrode layer The positive hole is combined with the electrons injected from the second electrode layer to illuminate the light-emitting layer, thereby emitting light of the 5 light layer. When the first electrode layer and the second electrode layer are short-circuited, the short portion: and the Joule generated by the short circuit in the vicinity thereof The heat is heated, and the low molecular weight compound injected into the two holes is decomposed and vaporized by the heat. In other words, when the low molecular weight compound contained in the positive hole injection layer is a phthalocyanine derivative: 11! Decomposition and gasification of the substituent portion. As a result, the injection layer of the 1 〇 positive hole near the short circuit is vaporized and the volume is expanded, so that the shorted first electrode layer is separated from the second electrode layer. In other words, the aforementioned combination structure In an organic EL device, even if the first electrode layer and the second electrode layer are short-circuited, when the electric field is applied between the first electrode layer and the second electrode layer, the positive hole injection layer is heated and decomposed at a relatively low temperature. The expansion is so that the short-circuited portion can recover its function by itself. In addition, since the inexpensive high-purity phthalocyanine derivative can be obtained, the manufacturing cost of the organic EL element can be lowered. The molecular weight compound is formed on a first electrode layer; thus, even if the substance is adhered to the first electrode layer, when covered, a positive hole injection layer can be formed. As a result, the foreign substance 20 and the first electrode layer are formed. The portions in contact with each other and their vicinity become difficult to form. The defective portion of the positive hole injection layer. Further, according to the aforementioned coating method, the deposition method using vapor deposition as compared with the film can prevent pinholes from being formed in the film. Further, it is difficult to cause a short circuit between the first electrode layer and the second electrode layer. Further, the film containing the low molecular weight compound easily removes the residual solvent and the moisture absorbed by the 11 1304437; thus, an organic EL element having high stability can be obtained. The low molecular weight compound which can be used for the positive hole injection layer is not limited to the soluble phthalocyanine derivative. For example, a soluble naphthalocyanine derivative, a soluble cyanine derivative, and a soluble polyfunctional amine derivative can be used as the material for the positive hole injection layer. As the polyfunctional amine derivative, an arylamine derivative such as a triphenylamine derivative can be used. Further, the positive hole injection layer is not limited to the case where the positive hole injection layer is formed of the aforementioned phthalocyanine derivative, and the positive hole injection layer may contain a compound having excellent positive hole injection properties as a dopant. The organic functional layer contained in the organic EL element is not limited to a four-layer structure such as the one described above as long as it has a structure containing at least one positive hole injection layer. For example, the organic functional layer may have a five-layer structure composed of a positive hole injection layer, a positive hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer. An organic EL device according to the present invention, comprising: first and second electrode layers opposed to each other, and an organic functional layer containing an organic compound and sandwiched between the first electrode layer and the second electrode layer, the organic functional layer The positive hole injection layer is disposed adjacent to the first electrode layer, and the positive hole injection layer comprises a pyrolyzed low molecular weight compound soluble in an organic solvent, having a positive electric 20 hole injection property to the first electrode layer And the case where the second electrode layer is in contact with each other via the defect portion of the positive hole injection layer, when the Joule heat due to the short circuit thermally decomposes and expands the positive hole injection layer, the positive hole injection layer and the first electrode The layer contacts, so the first electrode layer and the second electrode layer can be effectively isolated. Thus, self-repair of the short-circuit portion can be achieved.
12 低嫁本發明之有機EL元件 弟—電極層於其#1 、方法，其包括形成一 於孩第-電極=上；形卜含有機化合物之有機功能層 極層，卿J 及於财機雜層均成-第二電 一電極層_，Mm h心人層與該第 溶於有機溶劑且1二^洞注人層包括製備含有可 物之溶液，=電洞注入性質之熱解低分子量化合 洞注入層可:該溶液於該第-電極層上，因該正電 極層上料 蓋低分子量化合物之缝於第一電 10 引發之正電洞注入層之缺陷難以4二:均所 與第二電極層W發短路之機率下降。’弟一包極層 【圖式簡單說明】 第1圖為略圖顯示根據本發明之一種有機虹 意剖面圖。 15 【主要元件符號說明】 6“·發光層 7···電子注入層 8···有機功能層 9···第二電極層 1···有機電致發光元件 2…基材 3···第一電極層 4···正電洞注入層 5···正電洞傳輸層 1312 Low-marriage organic EL element of the invention - electrode layer in its #1, method, which comprises forming a first-electrode-electrode layer; the organic functional layer of the organic compound layer, Qing J and Yucai The heterogeneous layer is formed into a second electric one electrode layer _, the Mm h core layer and the first organic solvent dissolved in the first two holes include preparing a solution containing the object, and the pyrolysis property of the hole is low. The molecular weight compounding hole injection layer may be: the solution is on the first electrode layer, and the defect of the positive hole injection layer caused by the slit of the low molecular weight compound on the positive electrode layer is difficult to be caused by the first electric 10; The probability of short circuit with the second electrode layer W is lowered. </ RTI> A package of polar layers [Simplified description of the drawings] Fig. 1 is a schematic view showing an organic rainbow cross-sectional view according to the present invention. 15 [Description of main component symbols] 6"·Light-emitting layer 7···Electron injection layer 8···organic functional layer 9···second electrode layer 1···organic electroluminescence device 2...substrate 3·· ·First electrode layer 4···Positive hole injection layer 5···Positive hole transmission layer 13