Cai, Y., Shen, S., Zhu, C. et al. (3 more authors) (2020) Non-polar (11-20) GaN metal-semiconductor-metal photo-detectors with superior performance on silicon. ACS Applied Materials & Interfaces, 12 (22). pp. 25031-25036. ISSN 1944-8244
Abstract
This article reports a nonpolar GaN metal–semiconductor–metal (MSM) photodetector (PD) with an ultrahigh responsivity and an ultrafast response speed in the ultraviolet spectral region, which was fabricated on nonpolar (112̅0) GaN stripe arrays with a major improvement in crystal quality grown on patterned (110) silicon substrates by means of using our two-step processes. Our nonpolar GaN MSM-PD exhibits a responsivity of 695.3 A/W at 1 V bias and 12628.3 A/W at 5 V bias, both under 360 nm ultraviolet illumination, which are more than 20 times higher and 4 orders of magnitude higher compared to the current state-of-the-art photodetector, respectively. The nonpolar GaN MSM-PD displays a rise time and a fall time of 66 and 43 μs, respectively, which are 3 orders of magnitude faster compared to the current state-of-the-art photodetector.
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Copyright, Publisher and Additional Information: | © 2020 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. | ||||||||
Keywords: | nonpolar GaN; photodetector; responsivity; response time; ultraviolet; silicon substrates | ||||||||
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Institution: | The University of Sheffield | ||||||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) | ||||||||
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Depositing User: | Symplectic Sheffield | ||||||||
Date Deposited: | 15 May 2020 13:48 | ||||||||
Last Modified: | 19 Nov 2021 11:53 | ||||||||
Status: | Published | ||||||||
Publisher: | American Chemical Society (ACS) | ||||||||
Refereed: | Yes | ||||||||
Identification Number: | https://doi.org/10.1021/acsami.0c04890 | ||||||||
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