Makinudin, Abdullah Haaziq Ahmad and Al-Zuhairi, Omar and Anuar, Afiq and Zainorin, Mohamed Zulhakim and Bakar, Ahmad Shuhaimi Abu and DenBaars, Steven and Supangat, Azzuliani (2021) Impact of crystallinity towards the performance of semi-polar (11-22) GaN UV photodetector. Materials Letters, 286. ISSN 1873-4979, DOI https://doi.org/10.1016/j.matlet.2020.129244.
Full text not available from this repository.Abstract
Crystal engineered semi-polar (11-22) GaN-based UV photodetectors have been fabricated which exhibit two dissimilar photo-responses depending on the crystal quality. The higher crystal quality evaluated via x-ray rocking curve (XRC) exhibited remarkable narrow full width half maximum (FWHM) along -1-123] and 1-100] of 0.11 degrees (396 arcsec) and 0.28 degrees (1008 arcsec), respectively. Integration of the high crystalline structure with the metal-semiconductor-metal type photodetector resulted in notably lower dark current of 4.6 mu A. The responsivity value is significantly enhanced from 117 mA/W to 325 mA/W with higher crystalline epilayer. The photo-response of the detector made with the enhanced crystal epilayer is measured to be as low as 170 ms with a recovery time of 241 ms by which is the fastest switching time ever reported in semi-polar (11-22) GaN metal-semiconductor-metal UV photodetector. (C) 2020 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Funders: | Fundamental Research Grant Scheme[FP078-2018A], RU Grant[ST025-2020], Collaborative Research in Engineering, Science and Technology Center[PV007-2019], Universiti Malaya Research Grant[RP039B-18AFR] |
| Uncontrolled Keywords: | Epitaxial growth;Thin films;Semi-polar;GaN;UV photodetector |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 22 Aug 2022 01:53 |
| Last Modified: | 22 Aug 2022 01:53 |
| URI: | http://eprints.um.edu.my/id/eprint/28740 |
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