Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of the Deposition Time onto Structural Properties of Cu2ZnSnS4 Thin Films Deposited by Pulsed Laser Deposition

펄스 레이저 증착법으로 제작한 Cu2ZnSnS4 박막의 구조 특성 변화에 대한 증착 시간 효과

  • Byeon, Mirang (Department of Materials Science and Engineering, Pusan National University) ;
  • Bae, Jong-Seong (Busan Center, Korea Basic Science Institute) ;
  • Hong, Tae-Eun (Busan Center, Korea Basic Science Institute) ;
  • Jeong, Euh-Duck (Busan Center, Korea Basic Science Institute) ;
  • Kim, Shinho (Department of Materials Science and Engineering, Pusan National University) ;
  • Kim, Yangdo (Department of Materials Science and Engineering, Pusan National University)
  • 변미랑 (부산대학교 재료공학부) ;
  • 배종성 (한국기초과학지원연구원 부산센터) ;
  • 홍태은 (한국기초과학지원연구원 부산센터) ;
  • 정의덕 (한국기초과학지원연구원 부산센터) ;
  • 김신호 (부산대학교 재료공학부) ;
  • 김양도 (부산대학교 재료공학부)
  • Received : 2012.10.04
  • Accepted : 2012.11.08
  • Published : 2013.01.27
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Abstract

The $Cu_2ZnSnS_4$ (CZTS) thin film solar cell is a candidate next generation thin film solar cell. For the application of an absorption layer in solar cells, CZTS thin films were deposited by pulsed laser deposition (PLD) at substrate temperature of $300^{\circ}C$ without post annealing process. Deposition time was carefully adjusted as the main experimental variable. Regardless of deposition time, single phase CZTS thin films are obtained with no existence of secondary phases. Irregularly-shaped grains are densely formed on the surface of CZTS thin films. With increasing deposition time, the grain size increases and the thickness of the CZTS thin films increases from 0.16 to $1{\mu}m$. The variation of the surface morphology and thickness of the CZTS thin films depends on the deposition time. The stoichiometry of all CZTS thin films shows a Cu-rich and S-poor state. Sn content gradually increases as deposition time increases. Secondary ion mass spectrometry was carried out to evaluate the elemental depth distribution in CZTS thin films. The optimal deposition time to grow CZTS thin films is 150 min. In this study, we show the effect of deposition time on the structural properties of CZTS thin film deposited on soda lime glass (SLG) substrate using PLD. We present a comprehensive evaluation of CZTS thin films.

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References

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