申请人:Wuhan Tianma Micro-Electronics Co., Ltd.
公开号:US20220144862A1
公开(公告)日:2022-05-12
Provided are an organic compound and use thereof. The organic compound has a structure shown in Formula I. Through molecular structure design, the organic compound is endowed with suitable HOMO and LUMO energy levels, which is conducive to matching energy levels of compounds in adjacent layers and achieving efficient exciton recombination. The organic compound has small overlap of HOMO/LUMO energy level, high singlet energy level E
S
, high triplet energy level E
T
and small energy level difference ΔE
ST
, which is conducive to reverse intersystem crossing and achieving higher luminescence efficiency. The organic compound molecule has high stability and low stacking degree, which is conducive to reducing concentration quenching and has excellent thermal and film stability. The organic compound is suitable as TADF materials, which is use for OLED devices, conducive to preparing OLED devices, can improve luminescence efficiency and stability of devices, reduce turn-on voltage and extend lifetime of devices.
提供了一种有机化合物及其用途。该有机化合物的结构如公式I所示。通过分子结构设计,该有机化合物具有适当的HOMO和LUMO能级,有利于匹配相邻层中化合物的能级,并实现高效的激子复合。该有机化合物具有小的HOMO/LUMO能级重叠,高的单重态能级ES,高的三重态能级ET和小的能级差ΔEST,有利于实现反向系统交叉和更高的发光效率。该有机化合物分子具有高稳定性和低堆积度,有利于减少浓度淬灭,并具有优异的热稳定性和膜稳定性。该有机化合物适用于TADF材料,用于OLED器件,有利于制备OLED器件,可以提高器件的发光效率和稳定性,降低开启电压并延长器件寿命。