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A Significantly Twisted Spirocyclic Phosphine Oxide as a Universal Host for High‐Efficiency Full‐Color Thermally Activated Delayed Fluorescence Diodes
Author(s) -
Li Jing,
Ding Dongxue,
Tao Youtian,
Wei Ying,
Chen Runfeng,
Xie Linghai,
Huang Wei,
Xu Hui
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201506286
Subject(s) - materials science , fluorescence , diode , quantum efficiency , xanthene , oled , phosphine oxide , optoelectronics , fluorene , solid state , host (biology) , photochemistry , nanotechnology , optics , phosphine , polymer , layer (electronics) , composite material , chemistry , physics , catalysis , ecology , biochemistry , biology
A universal thermally activated delayed fluorescence (TADF) host , 4′‐diphenylphosphinoylspiro[fluorene‐9,9′‐xanthene] (SFXSPO), is constructed with a highly distorted and asymmetric configuration and disordered molecular packing in its solid state. SFXSPO successfully endows its full‐color TADF diodes with state‐of‐the‐art performance, e.g., the record external quantum efficiency of 22.5% and 19.1% and internal quantum efficiency of ≈100% for its yellow TADF diodes and single‐host full‐TADF nearly‐white‐emitting devices, respectively.