Doğan, Ümit, Sarcan, Fahrettin, Hut, Elanur et al. (6 more authors) (2024) Characterization of composition dependence of properties of a MgNiO-based MSM structure. Physica Scripta. 095974. ISSN 0031-8949
Abstract
In this study, the effect of Mg composition on structural and optical properties of MgxNi1-xO alloy thin film single crystal semiconductors as well as their implementation into Metal-Semiconductor-Metal (MSM) photodetector are studied. An 850 meV blue-shift of the bandgap is observed from 3.65 eV to 4.50 eV with increasing Mg composition from 0% to 67%. The deep ultraviolet/visible rejection ratio, which is the ratio of photosensitivity at a peak wavelength of 360 nm to that at 450 nm is found to be ∼58 for Mg composition of 67%. Mg rich (%67 Mg) alloy-based photodetector is found to have two orders smaller dark current and have higher spectral response compared to NiO-based one. Spectral responsivities for MgxNi1-xO photodetectors are determined as 415 mA W−1, 80 mA W−1, and 5.6 mA W−1 for Mg compositions of 67%, 21%, and 0% (reference-NiO), respectively. Furthermore, the detectivity of the photodetectors enhances as Mg composition increases and the highest detectivity of a magnitude of ∼1011 Jones is found for the photodetector with Mg composition of 67%.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s) |
Keywords: | MBE,metal-semiconductor-metal,MgNiO,MSM,photoconductivity,photodetector,UV |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 06 Sep 2024 09:20 |
Last Modified: | 16 Oct 2024 20:07 |
Published Version: | https://doi.org/10.1088/1402-4896/ad6e3d |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1088/1402-4896/ad6e3d |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:216917 |
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