Recent Advances in Small-Molecule Organic Fluorescent Semiconductors

Abstract

Organic fluorescent semiconductors are highly desired for the advancement of integrated optoelectronic devices, such as organic light-emitting transistors (OLETs), electrically pumped organic lasers (EPOLs), and so on. Thanks to the joint efforts of chemists and materials scientists, the rapid developments of small-molecule organic fluorescent semiconductors have been witnessed recent years. The optoelectronic property has been greatly improved and several small-molecule organic fluorescent semiconductors with excellent comprehensive performances (mobility > 1.0 cm2∙V-1∙s-1, photoluminescence quantum yield efficiency (PLQY) > 20%) have emerged. The material database is also greatly enriched recent years including anthracene derivatives, fluorene derivatives, thiophene/phenylene co-oligomers (TPCOs), distyrylbenzene derivatives, etc. Therefore, it is timely and of great significance to summarize the recent advances of small-molecule organic fluorescent semiconductors to offer some hints for the researchers in this field. In this review, we firstly highlight the aggregation structures, the different types, recent research progress and design strategies of small-molecule organic fluorescent semiconductors. Then, we will briefly introduce the recent achievements of optoelectronic applications of small-molecule organic fluorescent semiconductors. Finally, we will give a conclusion and outlook about the challenges and opportunities for the future development of small-molecule organic fluorescent semiconductors.