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Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition
Materials Science-Poland ( IF 1.3 ) Pub Date : 2021-01-09 , DOI: 10.2478/msp-2020-0052
N. Chabou 1 , B. Birouk 1 , M.S. Aida 2 , J.P. Raskin 3
Affiliation  

Nanocrystalline zinc sulfide (ZnS) thin films are prepared on glass substrates by chemical bath deposition (CBD) method using aqueous solutions of zinc chloride, thiourea ammonium hydroxide along with non-toxic complexing agent tri-sodium citrate in alkaline medium at 80 °C. The deposition time and annealing effects on the optical and morphological properties are studied. 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 surface coverage. UV-Vis (300 nm to 800 nm) spectrophotometric measurements show transparency of the films (transmittance ranging from 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 °C for 120 min, the transmittance increases up to 87 %.

中文翻译:

沉积时间和退火对化学浴沉积ZnS薄膜的形貌和光学性质的影响

在80°C的碱性介质中,使用氯化锌,硫脲氢氧化铵和无毒络合剂柠檬酸三钠的水溶液,通过化学浴沉积(CBD)方法在玻璃基板上制备纳米晶硫化锌(ZnS)薄膜。研究了沉积时间和退火对光学和形态性能的影响。通过扫描电子显微镜(SEM),X射线能量色散光谱(EDAX)和紫外可见光谱研究了薄膜的形貌,组成和光学性质。SEM显微照片显示出均匀的表面覆盖。UV-Vis(300 nm至800 nm)分光光度法测量显示薄膜的透明度(透射率范围为69%至81%),直接允许的能带隙为3.87 eV至4.03 eV。
更新日期:2021-01-11
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