Toxic-free surface level sulphur doped 1D Ti-Ox-Sy nanorods for superstrate heterojunction CZTS thin-film solar cells

Varadharajaperumal, S and Alagarasan, D and Sripan, C and Ganesan, R and Satyanarayan, MN and Hegde, G (2021) Toxic-free surface level sulphur doped 1D Ti-Ox-Sy nanorods for superstrate heterojunction CZTS thin-film solar cells. In: Materials Research Bulletin, 133 .

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Abstract

Surface level sulphur (S) doped TiO2 nanorods (S-TNRs) were fabricated via toxic-free novel three-step processes such as low-temperature hydrothermal method followed by thermal evaporation (S layer) and post-annealing (350 °C, 450 °C and 550 °C) techniques. Present work focuses on the comprehensive studies of surface level doping, structure, morphology and compositional properties of different temperature annealed S-TNRs for CZTS thin-film (Au/CZTS/S-TNRs/TNRs/FTO) solar cells. The oxidation states of incorporated S atoms in the TiO2 matrix were identified from X-ray photoelector spectroscopy (XPS) analysis. A reduction in bandgap for 350 °C annealed S-TNRs film was observed from UV-Vis spectroscopy. The electrical characteristics showed the fabricated solar cells strongly depend on the S-TNRs annealing temperature. Proposed technique would be useful in effective and controlled (surface level) doping of S atoms into any desired nanostructured metal oxides for optoelectronic applications and, further useful in fabricating cadmium (Cd) free buffer layer in chalcogenide solar cells. © 2020 Elsevier Ltd

Item Type:	Journal Article
Publication:	Materials Research Bulletin
Publisher:	Elsevier Ltd
Additional Information:	Copyright for this article belongs to Elsevier Ltd.
Keywords:	Annealing; Buffer layers; Heterojunctions; Morphology; Nanorods; Oxide minerals; Semiconductor doping; Sulfur; Temperature; Thermal evaporation; Thin films; Titanium dioxide; Ultraviolet visible spectroscopy, Annealing temperatures; Chalcogenide solar cells; Compositional properties; Electrical characteristic; Low-temperature hydrothermal methods; Nanostructured metals; Optoelectronic applications; UV-vis spectroscopy, Thin film solar cells
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	14 Mar 2021 06:50
Last Modified:	14 Mar 2021 06:50
URI:	http://eprints.iisc.ac.in/id/eprint/66802

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