Optical and Structural Study of the CZTS (Cu2ZnSnS4) Thin Film for Solar Cell Derived from the Chloride-Based sol-gel Precursor Solution

M. Rahman, M. Bashar, N. Islam
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引用次数: 2

Abstract

Fabrication of environmentally safe C2ZnSnS4 (CZTS) photovoltaic thin films of pure kesterite state is crucial. We have preparedCZTS thin films by sol-gel dip-coating process from chloride-based chemicals. After vacuum-annealed at 550°C, the optical andstructural characters of the films were further examined by UV–vis spectroscopy, X-ray diffraction (XRD), scanning electronmicroscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) methods. The CZTS films offered high optical absorption(0.4x104cm-1) and nearly optimum bandgap energy (1.65e V). X-ray diffraction examination confirmed the kesterite structure offilms. Scanning electron micrograph affirmed the creation of jam-packed, condensed and granulated CZTS films. The thin filmdisplayed intermittent disposal of agglomerated particles with clear-cut edges. The energy dispersive X-ray spectroscopy study gavethe stoichiometric ratio as Cu: Zn: Sn: S= 2.2: 1.4: 1: 5.1. Dhaka Univ. J. Sci. 70(1): 1-7, 2022 (January)
氯基溶胶-凝胶前驱体制备太阳能电池用CZTS (Cu2ZnSnS4)薄膜的光学和结构研究
制备环境安全的纯kesterite态C2ZnSnS4 (CZTS)光伏薄膜至关重要。以氯化物为原料,采用溶胶-凝胶浸涂法制备了czts薄膜。在550℃真空退火后,采用紫外可见光谱(UV-vis)、x射线衍射(XRD)、扫描电镜(SEM)和能量色散x射线能谱(EDS)等方法对薄膜的光学和结构特性进行了进一步的研究。CZTS薄膜具有较高的光吸收率(0.4 × 104cm-1)和接近最佳能带能(1.65e V), x射线衍射检查证实了薄膜的kesterite结构。扫描电镜证实了CZTS薄膜的致密、致密和粒状的形成。薄膜显示出边缘清晰的聚集颗粒的间歇性处置。能量色散x射线光谱研究得到的化学计量比为Cu: Zn: Sn: S= 2.2: 1.4: 1:1: 5.1。达卡大学学报(自然科学版),70(1):1- 7,2022 (1)
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