Portal de Periódicos da CAPES

Achieving Pure Green Electroluminescence with CIEy of 0.69 and EQE of 28.2% from an Aza‐Fused Multi‐Resonance Emitter

2020; Wiley; Volume: 59; Issue: 40 Linguagem: Inglês

10.1002/anie.202008264

1521-3773

Yuewei Zhang, Dongdong Zhang, Jinbei Wei, Xiangchen Hong, Yangcheng Lü, Deping Hu, Guomeng Li, Ziyang Liu, Chen Yang, Lian Duan,

Organic Electronics and Photovoltaics

Abstract 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.