Achieving High Efficiency at High Luminance in Fluorescent Organic Light-Emitting Diodes through Triplet–Triplet Fusion Based on Phenanthroimidazole-Benzothiadiazole Derivatives

Xiangyang Tang, Hui Liu, Lei Xu, Xuehui Xu, Xin He, Futong Liu, Jianwu Chen, Qiming Peng