한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제48권4호
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  • Pages.328-333
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  • 2011
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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고온 및 고온고습 환경 내에서 ZnO:Al 투명전극의 열화가 CIGS 박막형 태양전지의 성능 저하에 미치는 영향

Effect of Degraded Al-doped ZnO Thin Films on Performance Deterioration of CIGS Solar Cell

  • 김도완 (부산대학교 재료공학부) ;
  • 이동원 (한국산업기술시험원 재료평가센터) ;
  • 이희수 (부산대학교 재료공학부) ;
  • 김승태 (LG이노텍(주) Solar Cell Lab) ;
  • 박지홍 (LG이노텍(주) Solar Cell Lab) ;
  • 김용남 (한국산업기술시험원 재료평가센터)
  • Kim, Do-Wan (School of Materials Science and Engineering, Pusan National University) ;
  • Lee, Dong-Won (Material Testing Center, Korea Testing Laboratory) ;
  • Lee, Hee-Soo (School of Materials Science and Engineering, Pusan National University) ;
  • Kim, Seung-Tae (Solar Cell Laboratory, LG Innotek Co., Ltd.) ;
  • Park, Chi-Hong (Solar Cell Laboratory, LG Innotek Co., Ltd.) ;
  • Kim, Yong-Nam (Material Testing Center, Korea Testing Laboratory)
  • 투고 : 2011.06.08
  • 심사 : 2011.07.25
  • 발행 : 2011.07.31
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초록

The influence of Al-doped ZnO (AZO) thin films degraded under high temperature and damp heat on the performance deterioration of Cu(In,Ga)$Se_2$ (CIGS) solar cells was investigated. CIGS solar cells with AZO/CdS/CIGS/Mo structure were prepared on glass substrate and exposed to high temperature ($85^{\circ}C$) and damp heat ($85^{\circ}C$/85% RH) for 1000 h. As-prepared CIGS solar cells had 64.91% in fill factor (FF) and 12.04% in conversion efficiency. After exposed to high temperature, CIGS solar cell had 59.14% in FF and 9.78% in efficiency, while after exposed to damp heat, it had 54.00% in FF and 8.78% in efficiency. AZO thin films in the deteriorated CIGS solar cells showed increases in resistivity up to 3.1 times and 4.4 times compared to their initial resistivity after 1000 h of high temperature and damp heat exposure, respectively. These results can be explained by the decreases in carrier concentration and mobility due to diffusion or adsorption of oxygen and moisture in AZO thin films. It can be inferred that decreases in FF and conversion efficiency were caused by an increase in series resistance, which resulted from an increase in resistivity of AZO thin films degraded under high temperature and damp heat.

키워드

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