Bibliographic Details
| Title: |
Optical and structural properties of Fe- and Ge-substituted CZTS thin films produced by alternating sputtering deposition. |
| Authors: |
Dong, Ming-Rong1,2 (AUTHOR), Chen, Yi-Qi3 (AUTHOR), Zhu, Yan1,3 (AUTHOR) zhuyan@kust.edu.cn |
| Source: |
Applied Physics A: Materials Science & Processing. Feb2025, Vol. 131 Issue 2, p1-9. 9p. |
| Subject Terms: |
*MAGNETRON sputtering, *THIN films, *DC sputtering, *OPTICAL films, *SPUTTER deposition |
| Abstract: |
Utilizing the DC magnetron sputtering technique in conjunction with a Cu₂ZnSnS₄ (CZTS) and metal Fe (or Ge) target through an alternating sputtering deposition process (CZTS/Fe/CZTS/Fe/CZTS) followed by vulcanization, we successfully synthesized Fe- and Ge-substituted CZTS thin films. The phase structure and optical properties of these films were characterized using X-ray diffraction (XRD), Raman spectroscopy, and UV-Vis spectroscopy. Our results indicate that by precisely controlling the thickness of the Fe and Ge interlayers, high-quality Fe- and Ge-substituted CZTS thin films can be produced. The analysis reveals that Fe substitution enhances absorbance in the long-wavelength region of the visible spectrum. Conversely, Ge substitution does not significantly affect absorbance in the long-wavelength region but decreases optical absorbance at wavelengths shorter than 700 nm. Adjustments in the band gap are achievable with Ge and Fe substitutions within a 50 nm range. However, an excess of Fe and Ge may result in the formation of secondary phase structures, specifically FeS₂ and SnS₂, without altering the band gap. [ABSTRACT FROM AUTHOR] |
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