Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
권호 표지
DOI QR코드

DOI QR Code

Heat Treatment of Cu0.9In0.7Ga0.3Se2 Powder Layer with a Mixture of Selenium and Ceramic Powder

셀레늄과 세라믹 혼합분말을 사용한 Cu0.9In0.7Ga0.3Se2 분말층의 소결거동 연구

  • Song, Bong-Geun (Center for Materials Architecturing, Korea Institute of Science and Technology (KIST)) ;
  • Hwang, Yoonjung (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Park, Bo-In (Center for Materials Architecturing, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Seung Yong (Center for Materials Architecturing, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Jae-Seung (Materials Science and Engineering, Korea University) ;
  • Park, Jong-Ku (Center for Materials Architecturing, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Doh-Kwon (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Cho, So-Hye (Center for Materials Architecturing, Korea Institute of Science and Technology (KIST))
  • 송봉근 (한국과학기술연구원, 물질구조제어연구단) ;
  • 황윤정 (한국과학기술연구원, 광전하이브리드연구센터) ;
  • 박보인 (한국과학기술연구원, 물질구조제어연구단) ;
  • 이승용 (한국과학기술연구원, 물질구조제어연구단) ;
  • 이재승 (고려대학교, 신소재공학과) ;
  • 박종구 (한국과학기술연구원, 물질구조제어연구단) ;
  • 이도권 (한국과학기술연구원, 광전하이브리드연구센터) ;
  • 조소혜 (한국과학기술연구원, 물질구조제어연구단)
  • Received : 2014.08.15
  • Accepted : 2014.08.18
  • Published : 2014.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

$Cu(In,Ga)Se_2$ (CIGS) thin films have been used as a light absorbing layer in high-efficiency solar cells. In order to improve the quality of the CIGS thin film, often selenization step is applied. Especially when the thin film was formed by non-vacuum powder process, selenization can help to induce grain growth of powder and densification of the thin film. However, selenization is not trivial. It requires either the use of toxic gas, $H_2Se$, or expensive equipment which raises the overall manufacturing cost. Herein, we would like to deliver a new, simple method for selenization. In this method, instead of using a costly two-zone furnace, use of a regular tube furnace is required and selenium is supplied by a mixture of selenium and ceramic powder such as alumina. By adjusting the ratio of selenium vs. alumina powder, selenium vaporization can be carefully controlled. Under the optimized condition, steady supply of selenium vapor was possible which was evidently shown by large grain growth of CIGS within a thin powder layer.

Keywords