Emegha Joseph Onyeka, Ukhurebor Kingsley Eghonghon, Aigbe Uyiosa Osagie, Damisa John, Babalola Adeoye Victor
College of Natural and Applied Sciences, Novena University, Ogume, Delta State, Nigeria.
Department of Physics, Faculty of Science, Edo State University, Uzairue, Edo State, Nigeria.
Heliyon. 2022 Aug 18;8(8):e10331. doi: 10.1016/j.heliyon.2022.e10331. eCollection 2022 Aug.
In an aqueous bath, quaternary thin films (TFs) of copper zinc iron sulphide (CZFS) were deposited on glass (soda-lime) substrates. The present study aimed to analyse the effect of deposition periods on the properties of the prepared CZFS TFs using Chemical bath deposition (CBD). The precursor and films were examined by Fourier Transform Infrared (FTIR) spectroscopy to check for the chemical formation present. Rutherford backscattering spectroscopy (RBS) was used to determine the elemental compositions and stoichiometry of the deposited films. The optical characteristics were observed by a UV-Vis Spectrophotometer and a four-point probe (FPP) for the electrical properties. The optical characterization revealed a direct transition band-gap energy that decreased from 1.96 to 1.50 eV with an increase in deposition period. The optical constants were studied with respect to the wavelength within the range of 300-900 nm. The films exhibited high resistive properties with a conductivity that varied with an increase in deposition period. The effect of deposition periods on the optical properties of refractive index, extinction coefficient, and real and imaginary parts of dielectric constants has been reported. All these parameters were found to increase with deposition period except for the film deposited for 18 h (C3). These results confirm that the aqueous deposited CZFS films can be tuned for various optoelectronic applications.
在水浴中，将铜锌铁硫化物（CZFS）的四元薄膜（TFs）沉积在玻璃（钠钙玻璃）基板上。本研究旨在通过化学浴沉积（CBD）分析沉积时间对制备的CZFS TFs性能的影响。通过傅里叶变换红外（FTIR）光谱对前驱体和薄膜进行检测，以检查其中存在的化学组成。卢瑟福背散射光谱（RBS）用于确定沉积薄膜的元素组成和化学计量比。通过紫外可见分光光度计观察光学特性，并用四点探针（FPP）测量电学性能。光学表征显示，随着沉积时间的增加，直接跃迁带隙能量从1.96 eV降至1.50 eV。在300 - 900 nm范围内研究了光学常数与波长的关系。薄膜表现出高电阻特性，其电导率随沉积时间的增加而变化。报道了沉积时间对折射率、消光系数以及介电常数实部和虚部等光学性能的影响。发现除了沉积18小时的薄膜（C3）外，所有这些参数均随沉积时间增加。这些结果证实，通过水相沉积的CZFS薄膜可针对各种光电子应用进行调控。
