期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 812, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152065
关键词
CIGS; Quaternary single target; One-step sputtering; Cu-poor composition
资金
- Korea Institute of Industrial Technology [EO190025]
- National Research Foundation of Korea (NRF) [2017R1D1A1B03032019]
- National Research Council of Science & Technology (NST), Republic of Korea [EO190025] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017R1D1A1B03032019] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Cu-poor CIGS thin films were fabricated by RF magnetron sputtering from a single quaternary target with the composition of Cu0.7In0.7Ga0.3Se2, in an effort to improve the cell efficiency of CIGS solar cells. The Cupoor thin films with the ([Cul/[In]+[Ga]) composition ratios of 0.70-0.77 were obtained showing that the composition of the target can be transferred to the film. It was also observed that the strongly (220)/ (204) preferred orientation appeared at the substrate temperatures higher than 600 degrees C, which is known to be essential for achieving high-quality CIGS solar cells. This result indicates that the Cu-Se compounds present in trace amounts of CIGS films hinder the (112) orientation and promotes the growth of the (220) orientation. As a result, the CIGS absorber layer with the Cu-poor composition and the (220)/(204) preferred orientation exhibited a drastically improved cell efficiency of 10.02%. (C) 2019 Published by Elsevier B.V.
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