Microstructural, optical, and electrophysical properties of Sb2(SxSe1-x)3 films for solar cells

IF 6 2区 工程技术 Q2 ENERGY & FUELS
T.M. Razykov , К.M. Kuchkarov , D.Z. Isakov , B.A. Ergashev , R.R. Khurramov , M.A. Makhmudov , L. Schmidt-Mende , Tim Mayer
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引用次数: 0

Abstract

A new method was developed for fabricating high-quality Sb2(SxSe1-x)3 solid solution thin films using chemical molecular beam deposition from Sb2Se3 and Sb2S3 compounds. Structural analysis showed that increasing sulfur content (x = 0.1–0.35) reduced grain length and shifted XRD peaks to higher angles, indicating lattice contraction. Raman spectroscopy revealed a decrease in Sb–Se modes (110 and 151 cm−1) and an increase in Sb–S modes (280 and 310 cm−1). The optical bandgap expanded from 1.15 eV to 1.39 eV due to the smaller atomic radius and higher electronegativity of sulfur. The electrical conductivity (σ) dropped from 2.3 × 10−5 to 3.4 × 10−6 (Ω·cm)−1 with increasing sulfur content. These variations are attributed to bandgap widening and composition-driven phase transitions in Sb2(SxSe1-x)3 thin films. Acceptor defects with activation energies of 89 meV and 107 meV were observed at lower sulfur ratios, while donor-type traps with energies of 308 meV and 450 meV dominated at higher x. These results demonstrate the tunable structural and electronic properties of Sb2(SxSe1-x)3 thin films for photovoltaic applications.
太阳能电池用Sb2(sxs1 -x)3薄膜的微观结构、光学和电物理性质
以Sb2Se3和Sb2S3化合物为原料,研究了化学分子束沉积制备高质量Sb2(SxSe1-x)3固溶体薄膜的新方法。结构分析表明,随着硫含量的增加(x = 0.1 ~ 0.35),晶粒长度减小,XRD峰位移角度增大,表明晶格收缩。拉曼光谱显示Sb-Se模式(110和151 cm−1)减少,Sb-S模式(280和310 cm−1)增加。由于硫的原子半径小,电负性高,光学带隙从1.15 eV扩大到1.39 eV。随着硫含量的增加,电导率(σ)由2.3 × 10−5下降到3.4 × 10−6 (Ω·cm)−1。这些变化归因于Sb2(sxs1 -x)3薄膜的带隙扩大和成分驱动的相变。在较低的硫比下观察到激活能为89 meV和107 meV的受体缺陷,而在较高的硫比下,激活能为308 meV和450 meV的供体型陷阱占主导地位。这些结果表明,用于光伏应用的Sb2(SxSe1-x)3薄膜的结构和电子性能是可调的。
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来源期刊
Solar Energy
Solar Energy 工程技术-能源与燃料
CiteScore
13.90
自引率
9.00%
发文量
0
审稿时长
47 days
期刊介绍: Solar Energy welcomes manuscripts presenting information not previously published in journals on any aspect of solar energy research, development, application, measurement or policy. The term "solar energy" in this context includes the indirect uses such as wind energy and biomass
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