A Study on the CIGS cells with Na-doped Mo back contact

Na이 첨가된 Mo 전극을 이용한 CIGS 박막 태양전지 연구

  • 윤재호 (한국에너지기술연구원 태양광발전연구단) ;
  • 김기환 (한국과학기술원 신소재공학과) ;
  • 김민식 (한국과학기술원 신소재공학과) ;
  • 안병태 (한국과학기술원 신소재공학과) ;
  • 안세진 (한국에너지기술연구원 태양광발전연구단) ;
  • 이정철 (한국에너지기술연구원 태양광발전연구단) ;
  • 윤경훈 (한국에너지기술연구원 태양광발전연구단)
  • Published : 2006.06.22

Abstract

The photovoltaic properties of CIES cells on alumina substrate were improved by using the Na-doped Mo as theabotom layer of hilo back contact. Na was supplied to the CIGS bulk region from alumina/Na-doped Mo/Mo/alumina? structure, as same assimilar to the Na diffusion from soda-lime glass. The content diffusion of Na from Na-doped bfo was smaller more controlled than that from SLG. These Our results indicate that Na-doped bfo act as Na source material and contents of Na amount can be controlled without the use of an alkali barrier layer. The best CIGS solar cell with conversion efficiency of 13.34%, $J_{sc}=34.62mA/cm^2,\;V_{oc}=0.58V$ and FF=66% for an active area of $0.45cm^2$ on the alumina substrate was obtained in the condition of for 100nm Na-doped Mo/1000nm Mo.

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