Zhang Yuewei, Zhang Dongdong, Wei Jinbei, Hong Xiangchen, Lu Yang, Hu Deping, Li Guomeng, Liu Ziyang, Chen Yang, Duan Lian
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, P. R. China.
Angew Chem Int Ed Engl. 2020 Sep 28;59(40):17499-17503. doi: 10.1002/anie.202008264. Epub 2020 Aug 11.
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 , 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.
纯绿色发光体对于在下一代显示器中实现超宽色域至关重要。在此，通过将难以获得的氮杂芳烃融合到硼（B）-氮（N）骨架上，采用有效的一步多环化方法成功合成了一种杂化多共振和电荷转移（HMCT）分子AZA-BN。AZA-BN呈现出纯绿色荧光，光致发光量子产率为99.7%。相应的绿色器件的最大外量子效率和功率效率分别为28.2%和121.7 lm W，半高宽（FWHM）仅为30 nm，国际照明委员会（CIE）坐标y为0.69，代表了最纯的绿色底部发射有机发光二极管。
