Seo, Se Won Jeon, Jong-Ok Seo, Jung Woo Yu, Yi Yin Jeong, Jeung-hyun Lee, Doh-Kwon Kim, Honggon Ko, Min Jae Son, Hae Jung Jang, Ho Won Kim, Jin Young 2024-01-20T04:33:55Z 2024-01-20T04:33:55Z 2021-09-05 2016-03-08 1864-5631 https://pubs.kist.re.kr/handle/201004/124292 A highly efficient Cu2ZnSn(S,Se)(4) (CZTSSe)-based thin-film solar cell (9.9%) was prepared using an electrochemical deposition method followed by thermal annealing. The Cu-Zn-Sn alloy films was grown on a Mo-coated glass substrate using a one-pot electrochemical deposition process, and the metallic precursor films was annealed under a mixed atmosphere of S and Se to form CZTSSe thin films with bandgap energies ranging from 1.0 to 1.2eV. The compositional modification of the S/(S+Se) ratio shows a trade-off effect between the photocurrent and photovoltage, resulting in an optimum bandgap of roughly 1.14eV. In addition, the increased S content near the p-n junction reduces the dark current and interface recombination, resulting in a further enhancement of the open-circuit voltage. As a result of the compositional and interfacial modification, the best CZTSSe-based thin-film solar cell exhibits a conversion efficiency of 9.9%, which is among the highest efficiencies reported so far for electrochemically deposited CZTSSe-based thin-film solar cells. English WILEY-V C H VERLAG GMBH STEP SULFO-SELENIZATION FABRICATION Compositional and Interfacial Modification of Cu2ZnSn(S,Se)(4) Thin-Film Solar Cells Prepared by Electrochemical Deposition Article 10.1002/cssc.201501256 1 CHEMSUSCHEM, v.9, no.5, pp.439 - 444 CHEMSUSCHEM 9 5 439 444 scie scopus 000372191600004 2-s2.0-84959365265 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Chemistry Science & Technology - Other Topics Article STEP SULFO-SELENIZATION FABRICATION bandgap electrodeposition recombination solar cells thin films