有机发光二极管
荧光
量子效率
化学
二极管
电致发光
磷光
单重态
吩恶嗪
光电子学
材料科学
光学
物理
原子物理学
激发态
吩噻嗪
有机化学
药理学
医学
图层(电子)
作者
Yi‐Pin Zhang,Meng‐Xi Mao,Shi‐Quan Song,Yi Wang,You‐Xuan Zheng,Jing‐Lin Zuo,Yi Pan
标识
DOI:10.1002/anie.202200290
摘要
In this study, we report the first circularly polarized white organic light-emitting diodes (CP-WOLEDs) based on all thermally activated delayed fluorescence (TADF) materials. Two pairs of spiro-type TADF enantiomers, (R/S)-SPOCN (5,5'-((2,2',3,3'-tetrahydro-1,1'-spirobi[indene]-7,7'-diyl)bis(oxy))bis(4-(10H-phenoxazin-10-yl)phthalonitrile)) and (R/S)-OSFSO (2'-(trifluoromethyl)-spiro[quinolino[3,2,1-kl]phenoxazine-9,9'-thioxanthene]-10',10'-dioxide), serve as emitters with complementary emission. The CP-OLEDs exhibit warm white emission with a CIE coordinate of (0.35, 0.46). Besides, decent device performances are observed with an external quantum efficiency of up to 21.6 % at maximum and 11.8 % at 1000 cd m-2 . Obvious circularly polarized electroluminescence signals are detected with a dissymmetry factor |gEL | of around 3.0×10-3 . This is the first report of CP-WOLEDs that can harvest both singlet and triplet excitons, which provides a feasible strategy for the development of CP-WOLEDs with remarkable device performances.
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