Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Selenium Doping on the Performance of Flexible Cu2SnS3(CTS) Thin Film Solar Cells

Mo 유연기판을 이용한 Cu2SnS3 박막 태양전지의 셀레늄 도핑 효과

  • Lee, In Jae (Department of Materials Science and Engineering, Chonnam National University) ;
  • Jo, Eunae (Department of Materials Science and Engineering, Chonnam National University) ;
  • Jang, Jun Sung (Department of Materials Science and Engineering, Chonnam National University) ;
  • Lee, Byeong Hoon (Department of Materials Science and Engineering, Chonnam National University) ;
  • Lee, Dong Min (Department of Materials Science and Engineering, Chonnam National University) ;
  • Kang, Chang Hyun (Interdisciplinary Program for Photonic Engineering, Chonnam National University) ;
  • Moon, Jong Ha (Department of Materials Science and Engineering, Chonnam National University)
  • 이인재 (전남대학교 신소재공학부) ;
  • 조은애 (전남대학교 신소재공학부) ;
  • 장준성 (전남대학교 신소재공학부) ;
  • 이병훈 (전남대학교 신소재공학부) ;
  • 이동민 (전남대학교 신소재공학부) ;
  • 강창현 (전남대학교 광공학협동과정) ;
  • 문종하 (전남대학교 신소재공학부)
  • Received : 2020.01.21
  • Accepted : 2020.01.22
  • Published : 2020.02.27
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Abstract

Due to its favorable optical properties, Cu2SnS3 (CTS) is a promising material for thin film solar cells. Doping, which modifies the absorber properties, is one way to improve the conversion efficiency of CTS solar cells. In this work, CTS solar cells with selenium doping were fabricated on a flexible substrate using sputtering method and the effect of doping on the properties of CTS solar cells was investigated. In XRD analysis, a shift in the CTS peaks can be observed due to the doped selenium. XRF analysis confirmed the different ratios of Cu/Sn and (S+Se)/(Cu+Sn) depending on the amount of selenium doping. Selenium doping can help to lower the chemical potential of sulfur. This effectively reduces the point defects of CTS thin films. Overall improved electrical properties were observed in the CTS solar cell with a small amount of selenium doping, and a notable conversion efficiency of 1.02 % was achieved in the CTS solar cell doped with 1 at% of selenium.

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References

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