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Photogating and electrical gating are key physical mechanisms in organic phototransistors (OPTs). However, most OPTs are based on thick and polycrystalline films, which leads to substantially low efficiency of both photogating and electrical gating and thus reduced photoresponse. Herein, high-performance OPTs based on few-layered organic single-crystalline heterojunctions are proposed and the obstacle of thick and polycrystalline films for photodetection is overcome. Because of the molecular scale thickness of the type I organic single-crystalline heterojunctions in OPTs, both photogating and electrical gating are highly efficient. By synergy of efficient photogating and electrical gating, key figures of merit of OPTs reach the highest among those based on planar heterojunctions so far as we know. The production of few-layered organic single-crystalline heterojunctions will provide a new type of advanced materials for various applications.

Publication history
Copyright
Acknowledgements

Publication history

Received: 22 April 2021
Revised: 28 June 2021
Accepted: 03 July 2021
Published: 05 August 2021
Issue date: March 2022

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

Acknowledgements

The authors acknowledge the financial support from the National Natural Science Foundation of China (Nos. 51873148, 52073206, 51633006, and 61704038), the Natural Science Foundation of Tianjin City (No. 18JC-YBJC18400), and Strategic Priority Research Program of Chinese Academy of Sciences (XDB36000000).

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