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Published in: Journal of Materials Science: Materials in Electronics 3/2024

01-01-2024

Optical properties of chemically synthesized SnS2 nanostructure and study of current transport mechanism in Schottky and heterojunction diodes

Authors: Lohnye Tangjang, Prerona Singha, Yowa Nanung, P. K. Kalita

Published in: Journal of Materials Science: Materials in Electronics | Issue 3/2024

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Abstract

SnS2 nanostructure was prepared by Chemical bath deposition method using sodium sulfide (Na2S) and tin (IV) chloride hydrate (SnCl4⋅H2O) as source of S−2 and Sn+4 at different volumetric ratios (Sn/S). XRD pattern of SnS2 confirms the formation of nanostructure with a hexagonal type of structure. It shows a transformation of nanoparticles into nanosheets when synthesized at higher molar concentration. The absorption edge shows a blue shift that confirms the quantum confinement effect in SnS2. Both direct and indirect band gaps of SnS2 are calculated using UV–visible spectroscopy. Photoluminescence indicates the probability of indirect transition and the existence of inherent defects. The electrical properties of SnS2 are measured in planar geometry show a linear ohmic behavior. The prepared SnS2 has been used to fabricate Schottky and heterojunction diodes. The ideality factor become less in heterojunction compared to Schottky one with an average barrier height 0.56 eV. The current transport process has been studied in both the fabricated devices that exhibited Richardson Schottky (RS)-type conduction mechanism.

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Metadata
Title
Optical properties of chemically synthesized SnS2 nanostructure and study of current transport mechanism in Schottky and heterojunction diodes
Authors
Lohnye Tangjang
Prerona Singha
Yowa Nanung
P. K. Kalita
Publication date
01-01-2024
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 3/2024
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-024-11989-8

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