Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Impact of Solution-Processed BCP Buffer Layer on Efficient Perovskite Solar Cells

페로브스카이트 태양전지에서의 저온 용액 공정의 BCP 버퍼층 효과

  • Jung, Minsu (School of Chemical & Environmental Engineering, Dong-Eui University) ;
  • Choi, In Woo (Ulsan Advanced Energy Technology R & D Center, Korea Institute of Energy Research) ;
  • Kim, Dong Suk (Ulsan Advanced Energy Technology R & D Center, Korea Institute of Energy Research)
  • 정민수 (동의대학교 화학환경공학부) ;
  • 최인우 (한국에너지기술연구원 울산차세대전지연구개발센터) ;
  • 김동석 (한국에너지기술연구원 울산차세대전지연구개발센터)
  • Received : 2020.10.12
  • Accepted : 2020.11.09
  • Published : 2021.01.01
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Abstract

Inorganic-organic hybrid perovskite solar cells have demonstrated considerable improvements, reaching 25.5% of certified power conversion efficiency in 2020 from 3.8% in 2009. In normal structured perovskite solar cells, TiO2 electron-transporting materials require heat treatment process at a high temperature over 450℃ to induce crystallinity. Inverted perovskite solar cells have also been studied to exclude the additional thermal process by using [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as a non-oxide electron-transporting layer. However, the drawback of the PCBM layer is a charge accumulation at the interface between PCBM and a metal electrode. The impact of bathocuproin (BCP) buffer layer on photovoltaic performance has been investigated herein to solve the problem of PCBM. 2-mM BCP-modified perovskite solar cells were observed to exhibit a maximum efficiency of 12.03% compared with BCP-free counterparts (5.82%) due to the suppression of the charge accumulation at the PCBM-Au interface and the resulting reduction of the charge recombination between perovskite and the PCBM layer.

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References

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