Gunasekaran, S and Elango, M (2020) Photosensitive activity of fabricated core-shell composite nanostructured p-CuO@CuS/n-Si diode for photodetection applications. Sensors and Actuators: A. Physical.

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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 twostep 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)/nSi diode owned a maximum photosensitivity (Ps) ~ 7.76 ×104 %, photoresponsivity (R) ~
798.61mA/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.

Item Type: Article
Uncontrolled Keywords: CuS@CuO; Core/shell heterostructure; Photoresponse; Photodetector
Divisions: PSG College of Arts and Science > Department of Physics
Depositing User: Mr Team Mosys
Date Deposited: 27 Aug 2022 03:53
Last Modified: 27 Aug 2022 03:53
URI: http://ir.psgcas.ac.in/id/eprint/1506

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