Pd-catalyzed C-H annulation reactions of halo- and aryl-heteroarenes were developed using readily available o-bromobiaryls and o-dibromoaryls, respectively. A variety of five-membered heteroarenes rapidly provided the corresponding phenanthrene-fused heteroarenes, which led to the identification of phenanthro-pyrazole and thiazole as new, stable -2 V redox couples. The flexible syntheses and tunability
HETEROCYCLIC DERIVATIVE AND ORGANIC ELECTROLUMINESCENT DEVICE THEREOF
申请人:Changchun Hyperions Technology Co., Ltd
公开号:US20220173333A1
公开(公告)日:2022-06-02
Provided are a heterocyclic derivative and an organic electroluminescent device thereof, which relates to the field of organic photoelectric materials. The heterocyclic derivative of Formula I has high electron mobility and great hole blocking performance, and thus the organic electroluminescent device prepared by using the heterocyclic derivative as the electron transport region material, especially the hole blocking material, has low drive voltage and high luminous efficiency. The organic electroluminescent device can also include a hole transport region, and the hole transport region, especially the emissive auxiliary layer, contains the triarylamine compound of Formula II. Since the electron transport region and the hole transport region of the device can effectively balance carriers, which reduces the quenching of excitons and improves the recombination probability of carriers, the device shows low drive voltage and high luminous efficiency.