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Cu2ZnSnSe4 태양전지의 적용을 위한 최적화 된 CdS 버퍼층 연구
김지영(Kim Gee-yeong),정아름(Jeong Ah Reum),조윌렴(Jo William) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.3
Cu2ZnSnSe4(CZTSe) is emerged as a promising material for thin-film solar cells because of non-toxic, inexpensive and earth abundant more than Cu(In, Ga)Se2 materials. For fabricating compound semiconductor thin-film solar cells, CdS is widely used for a buffer layer which fabricated by a chemical bath deposition method (CBD). Through the experiment, we controlled deposition temperature and mol ratio of solution conditions to find the proper grain 크기 and exact composition. The optimum CdS layers were characterized in terms of surface morphology by using a scanning electron microscope (SEM) and atomic force microscope (AFM). The optimized CdS layer process was applied on CZTSe thin-films. The thickness of buffer layer related with device perfomance of solar cells which controlled by deposition time. Local surface potential of CdS/CZTSe thin-films was investigated by Kelvin probe force microscopy (KPFM). From these results, we can deduce local electric properties with different thickness of buffer layer on CZTSe thin-films. Therefore, we investigated the effect of CdS buffer layer thickness on the CZTSe thin-films for decreasing device losses. From this study, we can suggest buffer layer thickness which contributes to efficiencies and device performance of CZTSe thin-film solar cells.
Identification of electronic structure and structural phases in perovskite crystals
Hye Ri Jung(정혜리),Trang Thi Thu Nguyen,Hye-Jin Jin(진혜진),Bich Phuong Nguyen,Seokhyun Yoon(윤석현),William Jo(조윌렴),Won Seok Woo(우원석),Chang Won Ahn(안창원),Shinuk Cho(조신욱),Ill Won Kim(김일원) 한국신재생에너지학회 2017 한국신재생에너지학회 학술대회논문집 Vol.2017 No.9