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Nano Research 2023, 16(1): 1277-1285 https://doi.org/10.1007/s12274-022-4780-x
Research Article | Issue | Published: 31 August 2022

Ultrasensitive broadband position-sensitive detector based on graphitic carbon nitride

Show Author's Information Xuexia Chen,  Xun Yang( ),  Qing Lou,  Yongzhi Tian,  Zhiyu Liu,  Chaofan Lv,  Yancheng Chen,  Lin Dong( ),  Chong-Xin Shan( )
Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
Keywords:
heterojunction, graphitic carbon nitride (g-CN), position-sensitive detector (PSD), lateral photovoltaic effect (LPE), trajectory tracking, acoustic detection
Topics:
Nanosensors Thin films
Cite this article:
Chen X, Yang X, Lou Q, et al. Ultrasensitive broadband position-sensitive detector based on graphitic carbon nitride. Nano Research, 2023, 16(1): 1277-1285. https://doi.org/10.1007/s12274-022-4780-x
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Abstract Full text Electronic supplementary material About this article

As a typical two-dimensional material, graphitic carbon nitride (g-CN) has attracted great interest because of its distinctive electronic, optical, and catalytic properties. However, the absence of a feasible route toward large-area and high-quality films hinders its development in optoelectronics. Herein, high-quality g-CN films have been grown on Si substrate via a vapor-phase transport-assisted condensation method. The g-CN/Si heterojunction shows an obvious response to ultraviolet–visible-near infrared photons with a responsivity of 133 A·W−1, which is two orders of magnitude higher than the best value ever reported for g-CN photodetectors. A position-sensitive detector (PSD) has been developed using the lateral photovoltaic effect of the g-CN/Si heterojunction. The PSD shows a wide response spectrum ranging from 300 to 1,100 nm, and a position sensitivity and rise/decay time of 395 mV·mm−1 and 3.1/50 μs, respectively. Moreover, the application of the g-CN/Si heterojunction photodetector in trajectory tracking and acoustic detection has been realized for the first time. This work unveils the potential of g-CN for large-area photodetectors, and prospects for their applications in trajectory tracking and acoustic detection.


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About this article

Ultrasensitive broadband position-sensitive detector based on graphitic carbon nitride

Show Author's information Xuexia Chen, Xun Yang( ), Qing Lou, Yongzhi Tian, Zhiyu Liu, Chaofan Lv, Yancheng Chen, Lin Dong( ), Chong-Xin Shan( )
Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China

Abstract

As a typical two-dimensional material, graphitic carbon nitride (g-CN) has attracted great interest because of its distinctive electronic, optical, and catalytic properties. However, the absence of a feasible route toward large-area and high-quality films hinders its development in optoelectronics. Herein, high-quality g-CN films have been grown on Si substrate via a vapor-phase transport-assisted condensation method. The g-CN/Si heterojunction shows an obvious response to ultraviolet–visible-near infrared photons with a responsivity of 133 A·W−1, which is two orders of magnitude higher than the best value ever reported for g-CN photodetectors. A position-sensitive detector (PSD) has been developed using the lateral photovoltaic effect of the g-CN/Si heterojunction. The PSD shows a wide response spectrum ranging from 300 to 1,100 nm, and a position sensitivity and rise/decay time of 395 mV·mm−1 and 3.1/50 μs, respectively. Moreover, the application of the g-CN/Si heterojunction photodetector in trajectory tracking and acoustic detection has been realized for the first time. This work unveils the potential of g-CN for large-area photodetectors, and prospects for their applications in trajectory tracking and acoustic detection.

Keywords: heterojunction, graphitic carbon nitride (g-CN), position-sensitive detector (PSD), lateral photovoltaic effect (LPE), trajectory tracking, acoustic detection

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Acknowledgements

Publication history

Received: 25 May 2022
Revised: 08 July 2022
Accepted: 15 July 2022
Published: 31 August 2022
Issue date: January 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was financially supported by Henan Center for Outstanding Overseas Scientists (No. GZS201903), the National Natural Science Foundation of China (Nos. 61804136, 11974317, and 62027816), Henan Science Fund for Distinguished Young Scholars (No. 212300410020), Key Project of Henan Higher Education (No. 21A140001), and the Zhengzhou University Physics Discipline Improvement Program.

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