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Title: | Electrodeposition of ZnS Thin Films by Complexing Agent‑Free Electrolyte Containing Sodium Thiosulfate as the Sulfur Precursor |
Authors: | Madhuwanthi, H.M.L.U. Mahanama, G.D.K. de Silva, D.S.M. |
Keywords: | Buffer layer · complexing agent free · electrodeposition · sodium thiosulfate · zinc sulfide |
Issue Date: | 2021 |
Publisher: | Journal of Electronic Materials |
Citation: | Madhuwanthi, H. M. L. U., Mahanama, G. D. K., & de Silva, D. S. M. (2021). Electrodeposition of ZnS Thin Films by Complexing Agent-Free Electrolyte Containing Sodium Thiosulfate as the Sulfur Precursor. Journal of Electronic Materials, 50(8), 4324–4332. https://doi.org/10.1007/s11664-021-08948-y |
Abstract: | Thin films of zinc sulphide (ZnS) were prepared by a facile, economical, and scalable electrochemical method as a buffer layer for a CdS/CdTe based solar cell. Herein, a three-electrode cell in a complexing agent-free electrolyte containing 0.1 mol/L Na2S2O3 and 0.1 mol/L ZnSO4 was employed for the deposition of ZnS. The electrodeposition conditions (temperature: 30°C, pH: 4.2, cathodic potential: −1.10 V and deposition time: 90 min) were identified to grow an ideal thin film of ZnS on fluorine-doped tin oxide (FTO)-coated glass substrate, applying moderate stirring of 60 rpm. In material characterization of heat-treated samples (300°C, 10 min), the optical absorption measurement depicted a direct energy bandgap of 3.64 eV with low light absorbance and a blueshift from bulk ZnS. Scanning electron microscopy and atomic force microscopy studies demonstrated the uniform distribution of ZnS grains over the FTO glass substrate, and x-ray diffraction analysis revealed an amorphous structural nature of ZnS. The charge carrier density and flat-band potential of the ZnS material were determined as 1.19 × 10− 19 cm− 3 and −0.59 V, respectively, by Mott–Schottky analysis. |
URI: | http://repository.kln.ac.lk/handle/123456789/23805 |
Appears in Collections: | Chemistry |
Files in This Item:
File | Description | Size | Format | |
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Prof. D.S.M. De Silva - Electrodeposition of ZnS Thin Films by Complexing Agent Free Electrolyte Containing Sodium Thiosulfate as the Sulfur Precursor-1.pdf | 316.98 kB | Adobe PDF | View/Open |
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