Solution processing metal cathodes to fabricate all‐solution‐processed organic light‐emitting diodes (OLEDs) could significantly reduce their production cost. However, the challenge to realize all‐solution‐processed OLEDs lies in the electron injection layer (EIL) between the light emission layer and the high‐work‐function solution‐processed cathode. Aside from offering efficient electron injection, the EIL should resist the solvent, and prevent the solvent from permeating through to damage the organic functional layers beneath. Combining the advantages of both organic and inorganic EILs, a novel poly[9,9‐bis(60‐(N,N‐diethylamino)hexyl)‐fluorene‐alt‐9,9‐bis(3‐ethyl‐(oxetane‐3‐ethyloxy)‐hexyl)‐fluorene] (PFN‐OX)/ZnO hybrid EIL achieves all the necessary functions. To characterize the solvent‐proof capability quantitatively for the first time, a “solvent detector” is developed by detecting the poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate)'s lateral conductivity. The PFN‐OX/ZnO hybrid EIL not only shows better electron injection than the organic PFN‐OX EIL, but also retains the inorganic ZnO EIL's solvent resistance and solvent‐proof capability. Based on the PFN‐OX/ZnO hybrid EIL, all‐solution‐processed OLED devices are fabricated with spin‐coated Ag nanoparticles as the cathode. The poly(dibenzothiophene‐S,S‐dioxide‐co‐9,9‐dioctyl‐2,7‐fluorene) blue emission device reaches 1000 cd m⁻² at only 6.2 V with the luminous efficiency of 2.1 cd A⁻¹.

中文翻译：

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适用于所有解决方案的OLED的有机/无机混合EIL

对金属阴极进行固溶处理以制造全固溶处理的有机发光二极管（OLED）可以显着降低其生产成本。然而，实现全溶液处理的OLED的挑战在于发光层和高功能溶液处理的阴极之间的电子注入层（EIL）。除提供有效的电子注入外，EIL还应抵抗溶剂，并防止溶剂渗透而损坏下面的有机功能层。结合有机和无机EIL的优点，开发了一种新型的聚[9,9-bis（60-（N，N-（二乙氨基）己基）-芴-9,9-双（3-乙基-（氧杂环丁烷-3-乙氧基）-己基）-芴]（PFN-OX）/ ZnO杂化EIL实现了所有必要的功能。为了首次定量表征耐溶剂性，通过检测聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）的侧向电导率，开发了“溶剂检测器”。PFN-OX / ZnO混合EIL不仅比有机PFN-OX EIL表现出更好的电子注入，而且保留了无机ZnO EIL的耐溶剂性和耐溶剂性。基于PFN-OX / ZnO混合EIL，以旋涂Ag纳米粒子为阴极制造了所有溶液处理的OLED器件。聚（二苯并噻吩-S，S-二氧化物-co-9,9-二辛基-2,7-芴）蓝光发射装置达到1000 cd m ^-2仅在6.2 V的电压下具有2.1 cd A ^-1的发光效率。