Multi‐Controllability of Ambipolar Photoconductivity in Transition Metal Dichalcogenides Van der Waals Heterostructures

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Multi‐Controllability of Ambipolar Photoconductivity in Transition Metal Dichalcogenides Van der Waals Heterostructures
Title:
Multi‐Controllability of Ambipolar Photoconductivity in Transition Metal Dichalcogenides Van der Waals Heterostructures
Journal Title:
Advanced Materials Technologies
Keywords:
Publication Date:
18 September 2023
Citation:
Elbanna, A., Wang, Z., Liu, Y., Wu, Q. Y. S., Liang, X., Liu, H., Ooi, Z. E., Jiang, M., Deng, J., Sun, H., Pan, J., Shen, Z. X., & Teng, J. (2023). Multi‐Controllability of Ambipolar Photoconductivity in Transition Metal Dichalcogenides Van der Waals Heterostructures. Advanced Materials Technologies, 8(23). Portico. https://doi.org/10.1002/admt.202301079
Abstract:
Abstract2D transition metal dichalcogenides (TMDs) and their van der Waals heterostructures possess great potential for optoelectronic applications thanks to their strong quantum confinement and flexibility in bandgap engineering. Photodetection based on TMDs utilizing photoconductance typically exhibits positive photoconductance resulting from the generation of photocarriers upon illumination. This study reports a SnSe2/MoS2 photodetector operating over a broadband range from deep ultraviolet to infrared wavelengths with not only a high responsivity and self‐powered feature but also ambipolar photoresponse with both positive and negative photoconductances to multi‐control parameters of wavelength, gate voltage, and laser power. The transition from positive to negative photoconductance by gate voltage and laser power indicates that charge recombination and interlayer exciton trapping result in negative photoconductance. The coexistence and controllable positive and negative photoconductance hold potential for multifunctional optoelectronic devices responding to multi‐control parameters.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : NRF-CRP26-2021-0004

This research / project is supported by the A*STAR - AME Individual Research Grant
Grant Reference no. : A20E5c0084

This research / project is supported by the A*STAR - AME Individual Research Grant
Grant Reference no. : A2083c005

This research / project is supported by the A*STAR - GAP Funding
Grant Reference no. : I21D1AG010

This research / project is supported by the A*STAR - Career Development Fund - Seed Projects
Grant Reference no. : C222812008
Description:
This is the peer reviewed version of the following article: Elbanna, A., Wang, Z., Liu, Y., Wu, Q. Y. S., Liang, X., Liu, H., Ooi, Z. E., Jiang, M., Deng, J., Sun, H., Pan, J., Shen, Z. X., & Teng, J. (2023). Multi‐Controllability of Ambipolar Photoconductivity in Transition Metal Dichalcogenides Van der Waals Heterostructures. Advanced Materials Technologies, 8(23). Portico. https://doi.org/10.1002/admt.202301079 , which has been published in final form at doi.org/10.1002/admt.202301079. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
ISSN:
2365-709X
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