Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition
(2021) Materials Science-Poland — Vol. 38, n° 4, p. 508-517 (2020)
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- Nanocrystalline zinc sulfide (ZnS) thin films are prepared on glass substrates by chemical bath deposition (CBD) methodusing aqueous solutions of zinc chloride, thiourea ammonium hydroxide along with non-toxic complexing agent tri-sodiumcitrate in alkaline medium at 80 °C. The deposition time and annealing effects on the optical and morphological properties arestudied. The morphological, compositional, and optical properties of the films are investigated by scanning electron microscopy(SEM), X-ray energy dispersive spectroscopy (EDAX) and UV-Vis spectroscopy. SEM micrographs exhibit uniform surfacecoverage. UV-Vis (300 nm to 800 nm) spectrophotometric measurements show transparency of the films (transmittance rangingfrom 69 % to 81 %), with a direct allowed energy band gap in the range of 3.87 eV to 4.03 eV. After thermal annealing at 500 °Cfor 120 min, the transmittance increases up to 87 %.
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Citations
Chabou, N., Birouk, B., Aida, M. S., & Raskin, J. P. (2021). Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition. Materials Science-Poland, 38(4), 508-517. https://doi.org/10.2478/msp-2020-0052 (Original work published 2020)