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The Effect of Na on CIGS Module Performance
JinWoo Lee,ChulHwan Choi,KyoungHo Kang,MinJung Shin,SeHan Kwon,윤재호 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.12
We fabricated matched pairs of Cu(In<sub>1−x</sub>,Ga<sub>x</sub>)Se<sub>2</sub> (CIGS) solar cell devices on two different substrates with different Na levels. The effect of Na from the glass substrates on the CIGS device performance was investigated. We found clear evidence of performance enhancement due to Na especially for samples grown at higher temperatures. A comparison of the secondary ion mass spectroscopy (SIMS) profiles indicated the additional presence of alkali K atoms for devices on photovoltaic (PV)-specialty glass substrates. Novel reverse-bias-induced breakdown measurements were carried out to quantitatively characterize the quality of the junction interface due to the level of Na out-diffusion at higher growth temperatures.
Pawar, Sambhaji M.,Inamdar, Akbar I.,Gurav, Kishor V.,Shin, Seung Wook,Gwak, Jihye,Jo, Yongcheol,Yun, JaeHo,Pak, Hisun,Kwon, Sehan,Kim, Hyungsang,Kim, Jin Hyeok,Im, Hyunsik Elsevier 2015 CURRENT APPLIED PHYSICS Vol.15 No.2
<P>We have synthesized an efficient Cu2ZnSn(SxSe1-x)(4) (CZTSSe) absorbers by using single-step rapid thermal sulfo-selenization process of sputtered stack metallic precursor (Zn/Sn/Cu) films. The structural and morphological studies confirm that the suitability of the rapid thermal sulfo-selenization process for the synthesis of a CZTSSe absorber without any secondary phases with large grains. The annealing atmosphere with a mixed-chalcogen source enhances the grain growth of the CZTSSe absorber as compared with pure Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) absorbers. The CZTSSe thin film solar cell shows the best conversion efficiency of similar to 7%. (C) 2014 Elsevier B. V. All rights reserved.</P>