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Achieving Pure Green Electroluminescence with CIEy of 0.69 and EQE of 28.2% from an Aza‐Fused Multi‐Resonance Emitter
Author(s) -
Zhang Yuewei,
Zhang Dongdong,
Wei Jinbei,
Hong Xiangchen,
Lu Yang,
Hu Deping,
Li Guomeng,
Liu Ziyang,
Chen Yang,
Duan Lian
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202008264
Subject(s) - quantum efficiency , full width at half maximum , common emitter , quantum yield , electroluminescence , materials science , resonance (particle physics) , oled , diode , optoelectronics , fluorescence , analytical chemistry (journal) , chemistry , optics , atomic physics , physics , nanotechnology , layer (electronics) , chromatography
Pure green emitters are essential for realizing an ultrawide color gamut in next‐generation displays. Herein, by fusing the difficult‐to‐access aza‐aromatics onto B (boron)–N (nitrogen) skeleton, a hybridized multi‐resonance and charge transfer (HMCT) molecule AZA‐BN was successfully synthesized through an effective one‐shot multiple cyclization method. AZA‐BN shows pure green fluorescence with photoluminance quantum yield of 99.7 %. The corresponding green device exhibits a maximum external quantum efficiency and power efficiency of 28.2 % and 121.7 lm W −1 , respectively, with a full width half maximum (FWHM) of merely 30 nm and Commission Internationale de l'Eclairage (CIE) coordinate y of 0.69, representing the purest green bottom‐emitting organic light‐emitting diode.