Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Properties of the Scattering Layer Inserted Dye Sensitized Solar Cells

스캐터링층 도입에 따른 염료감응태양전지의 물성평가

  • Noh, Yunyoung (Department of Materials Science and Engineering, University of Seoul) ;
  • Song, Ohsung (Department of Materials Science and Engineering, University of Seoul)
  • 노윤영 (서울시립대학교 신소재공학과) ;
  • 송오성 (서울시립대학교 신소재공학과)
  • Published : 2013.10.05
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Abstract

We propose a working electrode with a scattering layer inserted for dye-sensitized solar cells (DSSCs) with the following structure: glass/FTO/blocking layer/$TiO_2$/scattering layer/dye/electrolyte/Pt/ FTO/glass. A working electrode without a scattering layer was also prepared using a similar method for comparison. The microstructure was examined by optical microscopy and field emission scanning electron microscopy (FE-SEM). The photovoltaic properties, such as the short circuit current density (Jsc), open circuit voltage (Voc), fill factor (FF), energy conversion efficiency (ECE) and impedance were characterized using a solar simulator and potentiostat. FE-SEM confirmed that the blocking layer with 20 nm grains and the scattering layer with 350-450 nm grains had been prepared. The Jsc and Voc increased, and impedance analysis revealed a decrease in the electron transfer resistance and electron recombination resistance at the $TiO_2$/electrolye interface. The ECE with the scattering layer was 6.35%, which was 20% higher than that observed in the ECE without the scattering layer.

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