Spectral stability and high color rendering index (CRI) remain challenges to high‐performance, solution‐processed white organic light‐emitting devices (WOLEDs) based on two complementary colors. The solution‐processed WOLED based on two thermally activated delayed fluorescence emitters with complementary color, i.e., the orange–red 2‐[4‐(diphenylamino) phenyl]‐10,10‐dioxide‐9H‐thioxanthen‐9‐one emitter and the blue 4,4′‐bis(carbazol‐9‐yl)‐2,2′‐dimethylbiphenyl:4,6‐bis(3,5‐di(pyridin‐4‐yl)phenyl)‐2‐phenylpyrimidine interface exciplex, is reported here. Poly[(9,9‐dioctylfluorenyl‐2,7‐diyl)‐co‐(4,4′‐(N‐(4‐sec‐butylphenyl)) diphenylamine)] is doped with 30 wt% cross‐linkable N,N′‐(4,4′‐(cyclohexane‐1,1‐diyl)bis(4,1‐phenylene))bis(N‐(4‐(6‐(2‐ethyloxetan‐2‐yloxy)hexyl)phenyl)‐3,4,5‐trifluoroaniline) to form a smooth hole transportation layer with outstanding solvent resistance ability and efficient hole transporting/injection ability. The position of interface exciplex and exciton management in the emitting layer can be tuned, thus anchoring the color stability. The device displays a maximum external quantum efficiency of 10.02% and a high CRI of 85 with Commission Internationale de l'Eclairage (CIE) color coordinates of (0.32, 0.33) at the luminescence of 1000 cd m⁻². These results are among the best of solution‐processed WOLEDs based on two complementary chromophores.

中文翻译：

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界面激发物固定溶液处理的热活化延迟荧光白色有机发光二极管的颜色稳定性

光谱稳定性和高显色指数（CRI）仍然是基于两种互补色的高性能，固溶处理的高性能白色有机发光器件（WOLED）的挑战。固溶处理的WOLED基于两个具有互补色的热激活延迟荧光发射器，即橙红色2– [4-（二（二苯基氨基）苯基] -10,10-二氧化物-9H-噻吨·9-9一个发射器，以及蓝色4,4'-双（咔唑-9-基）-2,2'-二甲基联苯：4,6-双（3,5-二（吡啶-4-基）苯基）-2-苯基嘧啶界面赋形化合物为在这里报道。聚[（9,9-二辛基芴基-2,7-二基）-co-（4,4'-（N-（4秒-（丁基苯基））二苯胺）]掺有30 wt％可交联的N，N'-（4,4'-（环己烷-1,1-二基）双（4,1-亚苯基））bis（N-（ 4-（6-（2-（2-乙基氧杂-2--2-氧基氧基）己基）苯基）-3,4,5-三氟苯胺）形成光滑的空穴传输层，具有出色的耐溶剂性和有效的空穴传输/注入能力。可以调整界面激基复合物和激子管理在发光层中的位置，从而固定颜色稳定性。该器件在1000 cd m ^-2的发光下显示出10.02％的最大外部量子效率和85的高CRI，国际照明委员会（CIE）的色坐标为（0.32，0.33）。这些结果是基于两种互补发色团的溶液处理WOLED的最佳结果。