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http://hdl.handle.net/10773/37677
Title: | Photosensitive activity of fabricated core-shell composite nanostructured p-CuO@CuS/n-Si diode for photodetection applications |
Author: | Gunasekaran, S. Thangaraju, D. Marnadu, R. Chandrasekaran, J. Shkir, Mohd Durairajan, A. Valente, M. A. Alshaharanig, T. Elango, M. |
Keywords: | CuS@CuO Core/shell heterostructure Photoresponse Photodetector |
Issue Date: | 1-Jan-2021 |
Publisher: | Elsevier |
Abstract: | Development of photo detectors based on different semiconducting materials with high performance has been in progress in recent past, however, there is a lot of difficulties in developing the more effective photo detectors-based devices with high responsivity, detectivity and quantum efficiency. Hence, we have synthesized pure CuS and CuO@CuS core-shell heterostructure based photo detectors with high performance by simple and cost-effective two-step chemical co-precipitation method. The phase purity of CuS and CuO@CuS composite was observed by XRD analysis and the result were verified with Raman spectroscopy studies. Sphere like morphology of pure CuS and core-shell structure formation of CuO@CuS are observed with scanning and transmission electron microscopes. The presence of expected elements has been confirmed with EDX elemental mapping. Light harvesting photodiodes were fabricated by using n-type silicon substrate through drop cost method. Photo sensitive parameters of fabricated diodes were analyzed by I-V characteristics. The p-CuO@CuS (1:1)/n-Si diode owned a maximum photosensitivity (Ps) ∼ 7.76 × 104 %, photoresponsivity (R) ∼ 798.61 mA/W, external quantum efficiency ( EQE )∼309.66 % and specific detectivity (D*) ∼ 8.19 × 1011 Jones when compared to p-CuS/n-Si diode. The obtained results revealed that the core/shell heterostructure of CuO@CuS is the most appropriate for photo detection. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/37677 |
DOI: | 10.1016/j.sna.2020.112373 |
ISSN: | 0924-4247 |
Appears in Collections: | DFis - Artigos I3N-FSCOSD - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Photosensitive activity of fabricated core-shell composite nanostructured.pdf | 4.92 MB | Adobe PDF | View/Open |
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