Recent Research Progress of Organic Small‐Molecule Semiconductors with High Electron Mobilities

Abstract

Organic electronics has made great progress in the past decades, which is inseparable from the innovative development of organic electronic devices and the diversity of organic semiconductor materials. It is worth mentioning that both of these great advances are inextricably linked to the development of organic high‐performance semiconductor materials, especially the representative n‐type organic small‐molecule semiconductor materials with high electron mobilities. The n‐type organic small molecules have the advantages of simple synthesis process, strong intermolecular stacking, tunable molecular structure, and easy to functionalize structures. Furthermore, the n‐type semiconductor is a remarkable and important component for constructing complementary logic circuits and p‐n heterojunction structures. Therefore, n‐type organic semiconductors play an extremely important role in the field of organic electronic materials and are the basis for the industrialization of organic electronic functional devices. This review focuses on the modification strategies of organic small molecules with high electron mobility at molecular level, and discusses in detail the applications of n‐type small‐molecule semiconductor materials with high mobility in organic field‐effect transistors, organic light‐emitting transistors, organic photodetectors, and gas sensors.

Efficient heterojunction constructed from wide-bandgap and narrow-bandgap small molecules enables dual-band absorption transparent photovoltaics

“…Triphenylamine (TPA) 23 and thiophene 24 are commonly used as donor blocks owing to their excellent hole-transporting properties. Among a large number of acceptor groups, including diketopyrrolopyrrole (DPP), [25][26][27] benzothiadiazole (BT), 28 thieno[3,4-c]pyrrole-4,6-dione (TPD), 29 squaraine, 30 dicyanovinyl, 31 and perylene diimide, 32 TPD with a planar and rigid structure can lead to improved packing and charge transport properties in OSCs, and it also exhibits a high absorption coefficient in the UV region, making it a promising unit for synthesizing UV absorption donors. In this study, we synthesized a set of wide-bandgap small molecules based on TPA and TPD units to harvest UV light in dual-band invisiblelight-absorption TPVs.…”

Hydrogen bonding-induced high-performance stretchable organic semiconductors: a Review

“…Organic semiconductors are organic materials with semiconductor properties (Chen et al, 2023). Compared with inorganic semiconductors, organic semiconductors have many advantages, such as being tailorable, easy to modify, and having low energy consumption (Zheng et al, 2022).…”

Bridging the gap from single molecule properties to organic semiconductor materials

“…In 1977, the discovery of conducting trans-polyacetylene by Shirakawa et al 1 sparked great interest in the field of organic semiconductors (OSCs), which have become one of the most exciting interdisciplinary research fields from chemistry, physics, engineering to biology. Because of their excellent electronic properties, solution processability, flexibility, and low fabrication cost, OSC materials have been used in the development of advanced electronic devices such as organic lightemitting diodes (OLEDs), [2][3][4][5] organic field-effect transistors (OFETs), [6][7][8] organic photovoltaics (OPVs), [9][10][11][12] organic photodetectors (OPDs), [13][14][15][16] and organic thermoelectrics (OTEs). [17][18][19][20] Given that OSCs exhibit chemical and structural diversity at the molecular level, it requires a great deal of effort and dedication from researchers to establish clear structure-property relationships on the basis of a large number of complex systems.…”