Recent progress on the carbazole-based small-molecule single-component organic room-temperature phosphorescence

Abstract

The pure organic room-temperature phosphorescence (RTP) luminophores have drawn great attention due to their unique photoelectronic properties and potential applications. According to the intrinsic capacity of triplet excitons population of carbazole, significant progress has been made in exploiting the carbazole-based organic phosphors. As the prospective luminescent materials, integration scaffold covering the merits of modulated lifetime, tunable luminous color, facile preparation and processing, remarkable stability and biocompatibility, high cost effectiveness was endeavoring to be realized. Herein, the recent remarkable achievements of single-component carbazole-based pure organic RTP materials are outlined, which are classified into the three categories according to the molecular structure characteristics, including donor/acceptor-attached conjugated molecules, sp3C modulated nonconjugated molecules, and the n & units composited molecules. Based on summarizing the diverse design strategies, corresponding organic room-temperature phosphorescence emission mechanisms and emission performances, the family of carbazole-containing organic RTP luminophores and the structure-property relationship are constructed, and multiple optimization methods to improve optical performances for functional applications are presented concurrently. Furthermore, the influences of the carbazole isomer impurity exerting on the RTP, behaviors are summed up briefly as well. The overview is intended to provide guidelines for developing the high-performance single-component organic RTP materials and propose perspectives for further broadening practical applications.