201251505 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種有機電致發光元件，且特別是有關於 一種具有高光取出率的有機電致發光元件及其光取出率的最 適化方法。 【先前技術】 有機電致發光元件，例如有機發光二極體(organic light emktingdiode ; OLED)元件，具有高亮度、螢幕反應速度快、 輕薄紐小、全彩、無視角差、不需背光以及節省燈源及耗電量， 因而已成為新一代顯示器的主要光源。 典型的有機電致發光元件，包含透明基板、透明之陽極、 電洞注入層、具電子傳輸功能之發光層及金屬陰極。當施以一 順向偏壓電壓時，電洞由陽極注入，而電子由陰極注入，由於 外加電場所造成的電位差，使電子及電洞在薄膜中移動，進而 在發光層中產生覆合。部分由電子電洞結合所釋放的能量，將 發光層的發光分子激發而成為激發態，當發光分子由激發態衰 變至基態時，其中一定比例的能量以光子的形式放出，所放出 的光為有機電致發光。 然而，因有機電致發光元件内部全反射的因素，使得發光 f所發出的光線，除了部分穿過透明之陽極向外出射外，大部 分(約80%)的光線都被元件内部所吸收，進而造成外部光子欵 #Cextenial quantum efficiency)變差，光取出率無法提昇等問 題。 因此有需要提供一種具有高光取出率的有機電致發光元 件及其光取出率最適化方法，以解決習知的有機電致發光元件 201251505 的外部光子效率不佳以及光取出率低落的問題。 【發明内容】 有鑑於此，本發明的目的之一，是在提供一種且右冥 出率的有機電致發光元件，包括：基材、透明電極有機發光 結構、反射層以及光學結構層。其中透明電極位於基材上；有 機發光結構位於透明電極上；反射層位於有機發光結構之上； 光學結構層位於基材相對於透明電極的一側，具有霧度 (Haze)、反射率(R)以及全光穿透率(τ)，且反射率和全光穿透 率一者之合，與霧度及反射率三者之乘積(HazexRx(R + T))實 質介於20%至35%之間。 在本發明之一實施例中，霧度係：全光穿透率與偏離法線 〇°到5°的部分光穿透率(T〇)二者之差，除以全光穿透率所得 之商((Τ 一 τ〇)/τ)。 在本發明之一實施例中，霧度實質大於65%，且反射率實 質大於5%。 在本發明之一實施例中，光學結構層包括：一基底材料 (matrix)層，以及分散於基底材料層中的複數個粒子，且這些 粒子的平均粒徑實質介於Ο.ίμιη到1μιη之間。 在本發明之一實施例中，這些粒子的材料，係選自於二氧 化鈦（Ti〇2)、氧化鋅(ΖηΟ)、氧化釔(丫2〇3)、铽釔紹石榴石 (Yttrium Aluminium Garnet; YAG; Υ3Α15〇ι2)、氧化鋁(Al2 〇3)、 二氧化矽(Si02)、碳酸鈣(CaC03)、硫酸鋇(BaS04)、二氧化錯 (Zr〇2)以及上述任意組合所組成之一族群。 在本發明之一實施例中，這些粒子的重量百分濃度實質介 於1至ίο之間；且基底材料層的厚度實質介於〇.linm至lem 201251505 之間。 ^ ，發明的另一目的，在提供一種有機電致發光元件光取出 率的最適化方法’包括下述步驟：首先提供—财機電致發光 疋件’包括.基材、透明電極、有機發光結構、反射層以及光 學結構層。其中咖電極位於基材上；有機發光結構位於透明 電極上；㈣層位於有機發光結構之上。之後，於基材相對於 透明電極的-側’形成光學結構層，使其具有霧度(Haze)、反 射率(R)以及全光穿透率(τ)，且反射率和全光穿透率二者之 合，與霧度及反射率三者之乘積(HazexRx(R + T))實質介於2〇 %至3 5 %之間。 本發月之冑知例中，开)成光學結構層的步驟，包括下 ，步驟1先提供基底材料；再將平均粒徑實質介於〇加到 μιη的複數個粒子分散於基底材料中；之後，將含有這些粒子 的基底材料’塗佈於基材相對於透明電極的一側。 在本發明之一實施例中，構成這些粒子的材料，係選自於 二氧化鈦、氧化鋅、氧她、彻咖榴石、氧她m =群奴峡、硫酸鋇、二氧化锆以及上述任意组合所組成之一 爐』在本發明之—實施财，形成光學結構層的步驟，更包括 调整粒子㈣度⑽基储料的_厚度 於65% ’城反射率實f大於5L W度實質大 述實關，本發鴨將含有龍辦·子的光學 結合於有機電致發光元件上。藉由調整 ； 不未粒子的濃度以及料結構層的厚度 發光元件的外部光子效率及光取出率 201251505 元件’嚴重的光線吸收問題，達成上述發明目的 【實施方式】 ，，目的就是在提供—種具有高光取出率的有機電 致發光元件及其光取出率的最適化方法， 致發光元件的外部光子效率不佳以及光取出率低落H機= 例，並配合所附圖式，其詳細說明如下：）乍从佳實施 一接ϊΐ照圖1 ’圖1係根據本發明的—較佳實施例所繪示的 種有機發光一極體元件100的結構剖面示意圖。 有機發光二極體元件100,包括：基材107、透明電極102、 有機發光結構103、反射層104以及光學結構層1〇5。其中， 基材101係一透光材質，較佳的材料可以是玻璃、半導體材質 (例如矽）、塑化材料或其他類似材質。在本實例之中基材ι〇ι 是一種玻璃基板。透明電極102位於基材1〇1上，較佳可以是 氧化銦錫(indium tin oxide，ΙΤΟ)玻璃所構成的透明陽極層。 有機發光結構103則位於透明電極1〇2上。在本發明的一 些實施例中，有機發光結構1〇3較佳係一有機發光二極體結 構’其至少包含有（但不以此為限）電洞傳輸層（H〇le201251505 VI. Description of the Invention: [Technical Field] The present invention relates to an organic electroluminescence device, and more particularly to an organic electroluminescence device having a high light extraction rate and an optimum method for optimizing the light extraction rate thereof . [Prior Art] Organic electroluminescent elements, such as organic light-emitting diodes (OLED) elements, have high brightness, fast screen response, light weight, small size, full color, no viewing angle difference, no backlighting, and saving Light source and power consumption have become the main source of light for next-generation displays. A typical organic electroluminescent device comprises a transparent substrate, a transparent anode, a hole injection layer, an electron-emitting layer and a metal cathode. When a forward bias voltage is applied, the hole is injected from the anode, and electrons are injected from the cathode. The potential difference caused by the applied electric field causes electrons and holes to move in the film, thereby causing a clad in the light-emitting layer. Part of the energy released by the electron hole combination excites the luminescent molecules of the luminescent layer to become an excited state. When the luminescent molecules decay from the excited state to the ground state, a certain proportion of the energy is emitted in the form of photons, and the emitted light is Organic electroluminescence. However, due to the factor of total reflection inside the organic electroluminescent element, most of the light emitted by the illuminating f is absorbed by the inside of the element except for a portion of the light that is emitted outward through the transparent anode. Further, the external photon 欵#Cextenial quantum efficiency) is deteriorated, and the light extraction rate cannot be improved. Therefore, there is a need to provide an organic electroluminescence device having a high light extraction rate and a method for optimizing the light extraction rate thereof to solve the problem of poor external photon efficiency and low light extraction rate of the conventional organic electroluminescence device 201251505. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide an organic electroluminescence device having a right-hand-to-right ratio, comprising: a substrate, a transparent electrode organic light-emitting structure, a reflective layer, and an optical structural layer. Wherein the transparent electrode is located on the substrate; the organic light emitting structure is located on the transparent electrode; the reflective layer is located on the organic light emitting structure; and the optical structural layer is located on the side of the substrate relative to the transparent electrode, having haze and reflectivity (R) And the total light transmittance (τ), and the combination of reflectance and total light transmittance, and the product of haze and reflectivity (HazexRx(R + T)) is substantially between 20% and 35 %between. In one embodiment of the invention, the haze is the difference between the total light transmittance and the partial light transmittance (T〇) from the normal 〇° to 5°, divided by the total light transmittance. The business ((Τ一τ〇)/τ). In one embodiment of the invention, the haze is substantially greater than 65% and the reflectance is substantially greater than 5%. In an embodiment of the invention, the optical structural layer comprises: a matrix layer, and a plurality of particles dispersed in the layer of the base material, and the average particle diameter of the particles is substantially between Ο.ίμιη to 1μιη between. In an embodiment of the present invention, the material of the particles is selected from the group consisting of titanium dioxide (Ti〇2), zinc oxide (ΖηΟ), cerium oxide (丫2〇3), and Yttrium Aluminium Garnet (Yttrium Aluminium Garnet; YAG; Υ3Α15〇ι2), alumina (Al2 〇3), cerium oxide (SiO 2 ), calcium carbonate (CaC03), barium sulfate (BaS04), dioxins (Zr〇2), and any combination of the above Ethnic group. In one embodiment of the invention, the weight percent concentration of the particles is substantially between 1 and ίο; and the thickness of the substrate material layer is substantially between 〇.linm to lem 201251505. ^, another object of the invention, is to provide an optimum method for optimizing the light extraction rate of an organic electroluminescent device', comprising the steps of: first providing a photoelectron device comprising: a substrate, a transparent electrode, an organic light emitting structure , a reflective layer, and an optical structural layer. Wherein the coffee electrode is on the substrate; the organic light emitting structure is on the transparent electrode; and the (four) layer is on the organic light emitting structure. Thereafter, an optical structural layer is formed on the side of the substrate relative to the transparent electrode to have haze, reflectance (R), and total light transmittance (τ), and reflectance and total light penetration. The combination of the two, the product of haze and reflectivity (HazexRx(R + T)) is between 2% and 35%. In the example of the present month, the step of forming an optical structural layer includes, in step 1, providing a base material first; and then dispersing a plurality of particles having an average particle diameter substantially between 〇 and μηη in the base material; Thereafter, the base material 'containing these particles' is applied to one side of the substrate with respect to the transparent electrode. In an embodiment of the invention, the material constituting the particles is selected from the group consisting of titanium dioxide, zinc oxide, oxygen, garnet, oxygen, m = group slave, barium sulfate, zirconium dioxide, and any combination thereof In the present invention, the step of forming an optical structural layer, including adjusting the particle (four) degree (10)-based storage material, the thickness of the material is 65%, and the reflectivity of the city is greater than 5 L. In fact, the hair duck will contain the optical coupling of the dragon's office to the organic electroluminescent element. By adjusting; not including the concentration of the particles and the thickness of the material structure layer, the external photon efficiency of the light-emitting element and the light extraction rate 201251505, the component's serious light absorption problem achieves the above-mentioned object of the invention, and the purpose is to provide An organic electroluminescence device having a high light extraction rate and an optimum method for optimizing the light extraction rate thereof, the external photon efficiency of the light-emitting element is poor, and the light extraction rate is low. For example, in conjunction with the drawings, the details are as follows. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing the structure of an organic light-emitting diode element 100 according to a preferred embodiment of the present invention. The organic light emitting diode device 100 includes a substrate 107, a transparent electrode 102, an organic light emitting structure 103, a reflective layer 104, and an optical structural layer 1〇5. The substrate 101 is a light transmissive material, and the preferred material may be glass, a semiconductor material (such as germanium), a plasticized material or the like. In the present example, the substrate ι〇ι is a glass substrate. The transparent electrode 102 is located on the substrate 1〇1, preferably a transparent anode layer composed of indium tin oxide (yttrium) glass. The organic light emitting structure 103 is located on the transparent electrode 1〇2. In some embodiments of the present invention, the organic light-emitting structure 1〇3 is preferably an organic light-emitting diode structure, which includes at least, but not limited to, a hole transport layer (H〇le).
Transporting Layer，HTL)、有機發光層（Organic Emitting Layer，EL)、電子傳輸層（Electron Transporting Layer，ETL)、以 及電子注入層（Electron Injection Layer，EIL)。由於有機發光二 極體結構係已為該技術領域中具有通常知識者所習知，因此形 成該結構的相關材質與方法並不在此贅述^ 反射層104位於有機發光結構103之上。在本發明的實施 201251505 例銦以是一種金屬陰極層’或是-種鍍覆於 陰極 一$化銦錫層的金屬層，用來作為有機發光二極體元件100的 極0 位於基材101才目對於透明電極102的-在=明7施辦，光學結構層1G5係―種複合材料 二S广Ξ· ΐ:σ物、玻璃等高分子材料或其他類似材料所 底材科層咖，以及複數個分散於基底材料層105a 中的奈米粒子105b。 #構成這些奈米粒子1〇5b的材料包含，二氧化鈦、氧化鋅、 乳，紀、铽迪石齡、氧她、二氧切、碳酸妈、硫酸鎖、 二氧化結或上述材_任意組合。在本發明的—些實施例中， 這些奈米粒子105b的平均粒徑實質介於〇1μηι到_之間。 藉由調整光學結構層105中奈米粒子職的濃度以及基 底材料層職的厚度，可以使光學結構層1〇5的霧度(Haze)、 全光穿透率T及反料R制―特定數值。在本發明的一些 實施例中，這些奈米粒子1G5b的重量百分濃度，較佳係實質 介於1至10之間；而基底材料層1〇5a的厚度實質介於〇」匪 至1 cm之間。 藉由調整光學結構層105中奈米粒子1〇5b的濃度以及基 底材料層105a的厚度，可以使光學結構層1〇5的反射率和全 光穿透率二者之合，與霧度及反射率三者之乘積(HazexRx(R + T))實質介於20%至35%之間。較佳使霧度實質大於65%， 且使反射率實質大於5%。 值得注意的是，目前國際間對於霧度定義存在有多種不同 的規範，各個規範的量測架構與方法各有不同，以下將採用數 學公式，並配合圖2來對光學結構層1〇5的霧度進行定義： 201251505 二圖2圖2軸據® 1之人射光通過光學結構居105 的先徑不思圖。其令1代表入射光(incident Hght) ; R代表；^ 光的反射率，· T代表全光穿透率；τ〇代表偏離法 的 部分光穿透率。霧度可由下述數學公式表示之：1角的 霧度(^2€)=丨丁-7^/丁。 若將此-光學結構層1〇5貼附於基材1〇1相對 1们的-側’可以使由有機發光結構103所出射，並= 電極102 #光線，產生均勻的散射效果，藉此提升 = 極體元件100的外部光子效率及光取出率。在本發明的二= 施例中’將採用光學結構層101的有機發光二極體元件1〇—0貫 與未採用光學結構層1〇5㈣知錢·發光元件作比較 發現，使用光學結構層1〇5至少可以使有機電致發光元件 5%到55%的外部光子效率及光取出率。 另外，藉由調整光學結構層105中奈米粒子1〇5b的濃度 以及基底材 105a的厚度，可喊有機發光二極體元件i(J 的外部光子效率及光取出率達到最佳化。請參照圖3，圖3係 根據本發_較佳實_靖示的—種最適化有機電致發光 元件之光取出率的方法流程圖。 有機電致發光元件光取出率的最適化包括下述步驟： 如步驟S31戶斤繚示：首先提供一個包含有基材1(n、透明電極 102、有機發光結構1〇3以及反射層刚的有機發光二極體元 件100(未包含光學結構層1〇5)。其中，透明電極位於基 材101上；有機發光結構103位於透明電極1〇2上；反射層 104位於有機發光結構103之上。 接著，於基材101相對於透明電極1〇2的一側，形成光學 9 1 201251505 結構層105。在本發明的較佳實施例中，光學結構層i〇5的形 成方式’包括先提供基底材料(如步驟S32所繪示）；再將平均 粒徑實質介於Ο.ίμιη到Ιμιη的複數個奈米粒子l〇5b分散於基 底材料中，並調整奈米粒子105b的濃度（如步驟S33所繪示）; 之後’將含有這些奈米粒子105b的基底材料，塗佈於基材1〇1 相對於透明電極102的一側，並控制基底材料的塗佈厚度(如 步驟S34所繪示）。 最後硬化基底材料(如步驟S35所繪示），而形成具有霧度 (Haze)、反射率(R)以及全光穿透率(T)，且反射率和全光穿透 率一者之合’與霧度及反射率三者之乘積(HazexRx(R + T))實 質介於20%至35%之間的基底材料層i〇5a。 在本發明的一較佳實施例中，霧度較佳係控制在實質大於 65%的範圍，而反射率R較佳則是控制在實質大於5%的範圍。 而構成這些奈米粒子105b的材料，係選自於二氧化欽、氧化 鋅、氧化釔、铽釔鋁石榴石、氧化鋁、二氧化矽、碳酸鈣、硫 酸鋇、二氧化鍅以及上述任意組合所組成之一族群。 瓜 根據上述實施例’本發明係將含有複數個奈米粒子的光學 結構層，結合於有機電致發光元件上。藉由調整光學結構層= 奈米粒子的濃度以及絲結構層的厚度，使光學結構声二 度、全光穿透率及反射率制-蚊數值，藉以提高 發光元件的外部光子效率及光取出率，解決習知_電 元件，嚴重的光線吸收問題，達成上述發明目的。 " 雖然本發明已以較佳實施例揭露如上，然其 本發明’任何熟習此技藝者，在顿離本發明之 = 内，當可作些敎更動制飾，因此本發明之保^ 附之申請專利範圍所界定者為準。 匕固田視傻 201251505 【圖式簡單說明】 圖1係根據本發明的一較佳實施例所繪示的一種有機電 致發光元件的結構剖面示意圖。 圖2係根據圖1所繪示之入射光通過光學結構層的光徑示 意圖。 圖3係根據本發明的較佳實施例所繪示的一種最適化有 機電致發光元件之光取出率的方法流程圖。 【主要元件符號說明】 1〇〇 :有機發光二極體元件 ιοί :基材 102 :透明電極 104 :反射層 l〇5a :基底材料層 Haze :霧度 R :反射率 103 :有機發光結構 105 :光學結構層 WSb :奈米粒子 1 :入射光 S :法線 T:全光穿透率 To:部分光穿透率 531 :提供-個包含有基材、透明電極 射層的有機電致發光元件。 何七九結構以及反 532 :提供基底材料 並調整奈米粒子 S33 :將複數個奈米粒子分散於基底材料中 的濃度 534 :將含有奈米粒子的基底材料塗佈於 的一侧，並鋪基缝_塗佈厚度；两彳目對於透明電極 535 :硬化基底材料Transporting Layer (HTL), Organic Emitting Layer (EL), Electro Transport Layer (ETL), and Electron Injection Layer (EIL). Since the organic light-emitting diode structure is well known to those of ordinary skill in the art, the related materials and methods for forming the structure are not described herein. The reflective layer 104 is located above the organic light-emitting structure 103. In the implementation of the present invention, the 201251505 indium is a metal cathode layer 'or a metal layer plated on the cathode-indium tin layer, and is used as the anode of the organic light-emitting diode element 100 on the substrate 101. For the transparent electrode 102, the optical structure layer 1G5 system, the composite material, the second S, the ΐ, the σ, the glass, and other similar materials, or the like, And a plurality of nanoparticles 105b dispersed in the base material layer 105a. The materials constituting these nano particles 1〇5b include titanium dioxide, zinc oxide, milk, Ji, Judi stone age, oxygen her, dioxo, carbonic acid mother, sulfuric acid lock, dioxide knot or any combination of the above materials. In some embodiments of the invention, the average particle size of the nanoparticles 105b is substantially between 〇1μηι to _. By adjusting the concentration of the nanoparticle in the optical structural layer 105 and the thickness of the base material layer, the haze of the optical structural layer 1〇5, the total light transmittance T, and the reverse R system can be made specific. Value. In some embodiments of the present invention, the weight percent concentration of the nanoparticles 1G5b is preferably substantially between 1 and 10; and the thickness of the base material layer 1〇5a is substantially between 〇"匪 to 1 cm. between. By adjusting the concentration of the nanoparticles 1〇5b in the optical structure layer 105 and the thickness of the base material layer 105a, the reflectance of the optical structural layer 1〇5 and the total light transmittance can be made, and the haze and The product of the three reflectances (HazexRx(R + T)) is substantially between 20% and 35%. Preferably, the haze is substantially greater than 65% and the reflectance is substantially greater than 5%. It is worth noting that there are many different specifications for the definition of haze in the world. The measurement architecture and methods of each specification are different. The following will use the mathematical formula and the optical structure layer 1〇5 with Figure 2. Haze is defined as: 201251505 2 Figure 2 Figure 2 Axis according to ® 1 The light that passes through the optical structure is 105. Let 1 be the incident Hght; R for the reflectance of light; · T for the total light transmittance; and τ for the partial light transmittance of the deviation method. The haze can be expressed by the following mathematical formula: haze at 1 angle (^2 €) = -7丁-7^/丁. If the -optical structure layer 1〇5 is attached to the side of the substrate 1〇1 relative to the one side, the light emitted from the organic light-emitting structure 103 and the electrode 102# can produce a uniform scattering effect. Lift = external photon efficiency and light extraction rate of the polar body element 100. In the second embodiment of the present invention, the organic light-emitting diode element using the optical structure layer 101 is compared with the optical structure layer 1〇5 (4), and the optical structure layer is used. 1〇5 can at least 5% to 55% of the external photon efficiency and light extraction rate of the organic electroluminescent element. Further, by adjusting the concentration of the nanoparticles 1b and 5b in the optical structure layer 105 and the thickness of the base material 105a, the external photon efficiency and the light extraction rate of the organic light-emitting diode element i can be optimized. Referring to Fig. 3, Fig. 3 is a flow chart of a method for optimizing the light extraction rate of an organic electroluminescent device according to the present invention. The optimization of the light extraction rate of the organic electroluminescent device includes the following. Step: As shown in step S31, firstly, an organic light-emitting diode element 100 including a substrate 1 (n, a transparent electrode 102, an organic light-emitting structure 1〇3, and a reflective layer) is provided (the optical structural layer 1 is not included). 〇5), wherein the transparent electrode is on the substrate 101; the organic light-emitting structure 103 is on the transparent electrode 1〇2; the reflective layer 104 is on the organic light-emitting structure 103. Next, the substrate 101 is opposite to the transparent electrode 1〇2 On one side, an optical 9 1 201251505 structural layer 105 is formed. In a preferred embodiment of the invention, the optical structural layer i〇5 is formed in a manner that includes providing a substrate material (as shown in step S32); The particle size is substantially between Ο.ί A plurality of nanoparticles l〇5b of μιη to Ιμιη are dispersed in the base material, and the concentration of the nanoparticles 105b is adjusted (as shown in step S33); then the base material containing the nanoparticles 105b is coated On the side of the substrate 1〇1 relative to the transparent electrode 102, and controlling the coating thickness of the base material (as shown in step S34). Finally, the base material is hardened (as shown in step S35) to form a haze. (Haze), reflectance (R), and total light transmittance (T), and the product of reflectivity and total light transmittance, which is the product of haze and reflectance (HazexRx(R + T) a substrate material layer i〇5a substantially between 20% and 35%. In a preferred embodiment of the invention, the haze is preferably controlled to be substantially greater than 65%, and the reflectance R is preferably It is controlled to be in a range of substantially more than 5%. The materials constituting the nanoparticles 105b are selected from the group consisting of dioxins, zinc oxide, cerium oxide, yttrium aluminum garnet, aluminum oxide, cerium oxide, calcium carbonate, a group consisting of barium sulfate, cerium oxide, and any combination of the above. The invention combines an optical structural layer containing a plurality of nanoparticles on an organic electroluminescent element. By adjusting the optical structural layer = the concentration of the nanoparticle and the thickness of the silk structural layer, the optical structure is acoustically secondarily , the total light transmittance and the reflectivity system - mosquito value, in order to improve the external photon efficiency and light extraction rate of the light-emitting element, to solve the conventional optical element, serious light absorption problem, to achieve the above object. The above has been disclosed in the preferred embodiments, and the present invention is not limited to the art of the present invention, and it can be modified and modified. The definition is subject to change. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing the structure of an organic electroluminescence device according to a preferred embodiment of the present invention. Figure 2 is an illustration of the optical path of incident light passing through the optical structural layer as depicted in Figure 1. 3 is a flow chart of a method for optimizing the light extraction rate of an electroluminescent element in accordance with a preferred embodiment of the present invention. [Explanation of main component symbols] 1〇〇: organic light-emitting diode element ιοί : substrate 102: transparent electrode 104: reflective layer l〇5a: base material layer Haze: haze R: reflectance 103: organic light-emitting structure 105: Optical structure layer WSb: Nanoparticle 1 : Incident light S: Normal line T: Total light transmittance To: Partial light transmittance 531 : Providing an organic electroluminescent element including a substrate and a transparent electrode layer . He Qijiu structure and anti-532: providing a base material and adjusting the nanoparticle S33: a concentration 534 in which a plurality of nanoparticles are dispersed in the base material: a base material containing the nanoparticle is coated on one side, and paved Base seam_coating thickness; two eyes for transparent electrode 535: hardened base material