Thin films of Magnesium Sulphide were deposited on a glass substrate at room temperature (300K) from aqueous solution of Magnesium Sulphate (MgSO 4 .7H 2 O), Ammonia (NH 3 ), Thiourea (NH 2 ) 2 CS in which Ethylene diamine tetra acetate (EDTA) as complexing agent. Distilled water was used to make up the solution to the required volume. After the deposition, the films were optically characterized using M501 Single Beam Scanning UV/Vis Spectrophotometer. The results indicate that films exhibited low absorbance values (0.055-0.244) and reflectance values (0.067-0.186) respectively within the visible region of electromagnetic spectrum. The films show corresponding high transmittance value of 57%-91% within this region. The calculated absorption coefficient values of 0.683 x 10 5 - 7.630 x 10 5 m were recorded for the films with high optical conductivity values of 0.256 x 10 13 S -1 – 4.579 x 10 13 S -1 in the visible region. The films were observed to possess low extinction coefficient values of 0.003-0.019 and poor imaginary dielectric function values of 0.010- 0.097. The calculated refractive index value was found to range from 1.56- 2.51. The films also exhibited direct wide band gap energy value of 3.85eV. All these desirable properties made the material a good candidate for photo-voltaic and photonic applications.
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机译：在室温（300K）下，从硫酸镁（MgSO 4 .7H 2 O），氨（NH 3），硫脲（NH 2）2 CS的水溶液中，将硫化镁薄膜沉积在玻璃基板上，其中乙二胺四醋酸盐（EDTA）作为络合剂。使用蒸馏水将溶液补足至所需体积。在沉积之后，使用M501单光束扫描UV / Vis分光光度计对膜进行光学表征。结果表明，在电磁波谱的可见光范围内，薄膜的吸光度值分别为（0.055-0.244）和反射率（0.067-0.186）。薄膜在该区域内显示出相应的57％-91％的高透射率值。对于在可见光区域具有0.256 x 10 13 S -1-4.579 x 10 13 S -1的高光导率值的薄膜，记录的计算吸收系数值为0.683 x 10 5-7.630 x 10 5 m。观察到该膜具有0.003-0.019的低消光系数值和0.010-0.097的不良虚构介电函数值。发现计算出的折射率值在1.56-2.51的范围内。该膜还表现出3.85eV的直接宽带隙能量值。所有这些理想的特性使该材料成为光伏和光子应用的理想选择。
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