Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Study on the Coating Condition of ZnS Passivation Layer for the Enhanced Photovoltaic Properties of Quantum Dot Photoelectrodes

양자점 광전극의 광전특성 향상을 위한 ZnS 패시베이션 층 코팅 조건에 관한 연구

  • JUNG, SUNG-MOK (Department of Chemical Engineering, Dankook University) ;
  • KIM, JAE-YUP (Department of Chemical Engineering, Dankook University)
  • 정성목 (단국대학교 화학공학과) ;
  • 김재엽 (단국대학교 화학공학과)
  • Received : 2022.02.09
  • Accepted : 2022.02.21
  • Published : 2022.02.28
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Abstract

Quantum dots (QDs) are attractive photosensitizer candidates for application not only in solar cells but also in solar hydrogen generation. For the prepartion of highly efficient QD-sensitized photoelectrodes, it is important to reduce electron recombination at the photoanode/electrolyte interface. Here, we study on the coating condition of ZnS passivation layers on the photoanodes in QD-sensitized solar cells (QDSCs). The ZnS passivation layers are coated by successive ionic layer adsorption and reaction method, and as the cation precursor, zinc acetate and zinc nitrate are empolyed. Due to the higher pH of cation precursor solution, the ZnS loading is improved when the zinc acetate is used, compared to the zinc nitrate. This improved loading of ZnS leads to the reduced electron recombination at the surface of photoanodes and the enhaced conversion efficiency of QDSCs from 6.07% to 7.45%.

Keywords

Acknowledgement

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구입니다(No. 2020R1C1C1012014). 또한, 이 연구는 2021년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구입니다(20017407).

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