Scholarlink

<p>In this work, copper zinc tin sulfide (CZTS) thin films were deposited using the spray pyrolysis method. This study involves an investigation on the effect of the zinc salt source on the properties of the materials. For this purpose, four zinc salts were used, including zinc acetate (Zn(OAc)<sub>2</sub>), zinc nitrate (Zn(NO<sub>3</sub>)<sub>2</sub>), zinc chloride (ZnCl<sub>2</sub>), and zinc sulfate (ZnSO<sub>4</sub>), while the salt source of the other elements was fixed. X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and optical transmittance spectra were used to examine the structural and optical properties of CZTS thin films. The XRD analysis reveals the formation of the Keserite CZTS phase [JCPDS No.26-0575] in all samples. However, we have noticed from the XRD pattern and the additional peaks in the raman spectra at 468 cm<sup>−1</sup> that using a sulfate zinc salt source only leads to the secondary phase CuS formation along with CZTS. The as-prepared samples deposited using ZnSO<sub>4</sub> and Zn(OAc)<sub>2</sub> demonstrated larger crystallite sizes (23nm, and 19nm, respectively) and lower strain values than the samples deposited with ZnCl<sub>2</sub> and Zn(NO<sub>3</sub>)<sub>2</sub>. The SEM observations indicated that ZnCl<sub>2</sub> and Zn(NO<sub>3</sub>)<sub>2</sub> samples showed smoother morphology and composition closer to the (Cu<sub>2</sub>ZnSnS<sub>4</sub>) stoichiometry. The samples showed excellent optical properties, with band gaps ranging from 1.48 to 1.67 eV, and a high absorption coefficient, which reached 1.4×10<sup>5</sup>&#xa0;cm<sup>−1</sup> for ZnCl<sub>2</sub> based sample in the visible range. Low transmission values, and moderate electrical conductivity were also noticed in all samples. Overall, these results indicate that ZnCl<sub>2</sub> and Zn(OAc)<sub>2</sub> are the most suitable zinc precursors for high-quality CZTS thin films in solar cell applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of salt source on the properties of CZTS thin films prepared via spray pyrolysis

  • 期刊论文

  • 发表日期：

    2025年4月25日

查看全文
  • Khaled Majed Alsubaie,
  • Ahmed Obaid M. Alzahrani,
  • Nasser Al-Khudairi,
  • Merfat M. Alsabban,
  • Maya Abu Alqumboz,
  • Kuo‐Wei Huang,
  • M. S. Aida

摘要

In this work, copper zinc tin sulfide (CZTS) thin films were deposited using the spray pyrolysis method. This study involves an investigation on the effect of the zinc salt source on the properties of the materials. For this purpose, four zinc salts were used, including zinc acetate (Zn(OAc)2), zinc nitrate (Zn(NO3)2), zinc chloride (ZnCl2), and zinc sulfate (ZnSO4), while the salt source of the other elements was fixed. X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and optical transmittance spectra were used to examine the structural and optical properties of CZTS thin films. The XRD analysis reveals the formation of the Keserite CZTS phase [JCPDS No.26-0575] in all samples. However, we have noticed from the XRD pattern and the additional peaks in the raman spectra at 468 cm−1 that using a sulfate zinc salt source only leads to the secondary phase CuS formation along with CZTS. The as-prepared samples deposited using ZnSO4 and Zn(OAc)2 demonstrated larger crystallite sizes (23nm, and 19nm, respectively) and lower strain values than the samples deposited with ZnCl2 and Zn(NO3)2. The SEM observations indicated that ZnCl2 and Zn(NO3)2 samples showed smoother morphology and composition closer to the (Cu2ZnSnS4) stoichiometry. The samples showed excellent optical properties, with band gaps ranging from 1.48 to 1.67 eV, and a high absorption coefficient, which reached 1.4×105 cm−1 for ZnCl2 based sample in the visible range. Low transmission values, and moderate electrical conductivity were also noticed in all samples. Overall, these results indicate that ZnCl2 and Zn(OAc)2 are the most suitable zinc precursors for high-quality CZTS thin films in solar cell applications.