Park, Se Jin An, Hee Sang Kim, Ji Eun Jeon, Hyo Sang Yoon, Sam S. Hwang, Yun Jeong Kim, Jihyun Kim, Dong-Wook Min, Byoung Koun 2024-01-20T05:32:04Z 2024-01-20T05:32:04Z 2021-09-05 2015-12 2046-2069 https://pubs.kist.re.kr/handle/201004/124679 In order to realize the modulation of band-gap profile in low-cost and printable CuInxGa(1-x)S(2) thin-film solar cells, a simple chemical route, namely a multi-stage paste coating method, was developed. In particular, with this method, multiple coatings with two precursor solution pastes with different compositions were applied. Elemental analysis techniques confirmed the formation of three different graded Ga distributions (front, back, and front-and-back gradient) throughout the absorber films depending on the coating sequence with two different pastes. The back gradient cell showed the largest power conversion efficiency of 7.29%, which was almost two times larger than those of the non-graded cells. English ROYAL SOC CHEMISTRY LOW-COST CHALCOPYRITE PERFORMANCE INK A simple chemical route for composition graded Cu(In,Ga)S-2 thin film solar cells: multi-stage paste coating Article 10.1039/c5ra20751g 1 RSC ADVANCES, v.5, no.125, pp.103439 - 103444 RSC ADVANCES 5 125 103439 103444 scie scopus 000366461000059 2-s2.0-84949949200 Chemistry, Multidisciplinary Chemistry Article LOW-COST CHALCOPYRITE PERFORMANCE INK CIGS solar cells Ga-grading solution process