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Structure and Characteristics of Tandem Solar Cell Composed of Dye-sensitized Solar Cell and Thermoelectric Generator

염료감응형 태양전지와 열전발전소자를 결합한 복합 태양전지의 구조 및 특성

  • 이동윤 (한국전기연구원 전자기소자연구그룹) ;
  • 송재성 (한국전기연구원 전자기소자연구그룹) ;
  • 이원재 (한국전기연구원 전자기소자연구그룹) ;
  • 김인성 (한국전기연구원 전자기소자연구그룹) ;
  • 정순종 (한국전기연구원 전자기소자연구그룹)
  • Published : 2005.04.01

Abstract

The tandem solar cell composed of a dye-sensitized solar cell (DSC) and a thermoelectric generator (TEG) was designed. In such new cell, the characteristics of DSC and TEG were investigated. DSC uses the wavelength range of 380∼750 nm and has the maximum efficiency of below 10 %. If the solar light transmitted through DSC can be converted to heat energy, TEG can generate electric energy using this heat energy. By this means, it is possible to utilize most of solar energy in the wavelength range of 350∼3000 nm for electric generation and it can be expected to obtain higher solar energy conversion efficiency exceeding the known limit of maximum efficiency. For this purpose we suggest the tandem solar cell constructed with DSC and TEG. In this structure, DSC has a carbon nanotube film as a counter electrode of DSC in order to collect the solar light and convert it to heat energy. We measured the I-V characteristics of DSC and TEG, assembled to the tandem cell. As a result, it was shown that DSC with carbon nanotube and TEG had the efficiency of 9.1 % and 6.2 %, respectively. From this results, it is expected that the tandem solar cell of the new design has the possibility of enhanced conversion efficiency to exceed above 15 %.

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