Elaboration, Structural and Optical Characterization of the New Ternary Chalcogenide SnSb2S5

A. F. Kraidy, I. M. El Radaf, Zeinert Andreas, Abdelilah Lahmar, A. Pelaiz-Barranco, Pardis Simon, Y. Gagou
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Abstract

In this study, -antimony sulfide (SnSb2S5) thin films with 200 nm, 312 nm, and 431 nm thicknesses were successfully fabricated using thermal evaporation. These films' structural, optical, and photoanode properties were meticulously characterized to assess their suitability for photovoltaic applications. X-ray diffraction (XRD) analysis confirmed the presence of an orthorhombic symmetry phase within the Pnma space group, ensuring the crystalline quality of the films. Raman spectroscopy further validated the crystal structure and provided detailed identification of the vibrational active modes specific to this pseudo-binary chalcogenide compound. Optical characterization revealed that the SnSb2S5 thin films possess direct optical bandgap energies ranging from 1.91 to 1.99 eV, making them ideal for efficient light absorption in photovoltaic devices. The refractive index (n) displayed minimal variation within the absorption region, indicating stable optical properties. At the same time, it increased proportionally with film thickness outside the absorption region, suggesting enhanced optical behavior with thicker films. This characteristic is particularly advantageous for improving the efficiency of photoanode materials. The combination of favorable structural properties, optimal bandgap energies, and tunable optical responses positions SnSb2S5 thin films as promising candidates for advanced photovoltaic and optoelectronic applications. These findings highlight the potential of SnSb2S5 in developing high-performance photoanodes, contributing to the advancement of solar energy conversion technologies.
新型三元钙钛矿 SnSb2S5 的制备、结构和光学特性分析
本研究利用热蒸发法成功制备了厚度分别为 200 nm、312 nm 和 431 nm 的硫化锑(SnSb2S5)薄膜。对这些薄膜的结构、光学和光阳极特性进行了细致的表征,以评估它们在光伏应用中的适用性。X 射线衍射 (XRD) 分析证实了 Pnma 空间群中正交对称相的存在,从而确保了薄膜的结晶质量。拉曼光谱进一步验证了晶体结构,并详细确定了这种假二元掺杂化合物特有的振动活跃模式。光学表征显示,SnSb2S5 薄膜具有 1.91 至 1.99 eV 的直接光带隙能量,使其成为光电设备中高效光吸收的理想材料。折射率(n)在吸收区域内的变化极小,表明其具有稳定的光学特性。同时,在吸收区域外,折射率随薄膜厚度的增加而成正比增加,这表明薄膜越厚,光学性能越强。这一特性对于提高光阳极材料的效率尤为有利。良好的结构特性、最佳带隙能量和可调光学响应的结合,使 SnSb2S5 薄膜有望成为先进光伏和光电应用的候选材料。这些发现凸显了 SnSb2S5 在开发高性能光阳极方面的潜力,有助于推动太阳能转换技术的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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