Yoon, Ju-Heon Kim, Won-Mok Park, Jong-Keuk Baik, Young-Joon Seong, Tae-Yeon Jeong, Jeung-hyun 2024-01-20T11:00:27Z 2024-01-20T11:00:27Z 2021-09-04 2014-01 1062-7995 https://pubs.kist.re.kr/handle/201004/127301 The surface microstructures of molybdenum (Mo) back contacts were shown to play a crucial role in the preferred orientations of Cu(In,Ga)Se-2 (CIGS) films. The lower surface density of Mo tends to drive the growth of CIGS films toward favoring a (220)/(204) orientation, attributed to the higher likelihood of a MoSe2 reaction. This work showed that the presence of a very thin layer on a Mo bilayer facilitated the tuning of the CIGS grain orientations from strongly favoring (112) to strongly favoring (220)/(204) without sacrificing the electrode conductivity. The efficiency of Na-doped CIGS cells was increased toward decreasing Mo surface density, that is, increasing (220)/(204) CIGS orientation. Although slight changes in Na doping found between different Mo surface properties could contribute in part, the comparison with Na-reduced CIGS cells showed that it was more likely due to the (220)/(204) orientation-related enhancement of CdS/CIGS junction characteristics, which were possibly attributed to a favorable CdS reaction and a reduction in the defect metastabilities. Copyright (c) 2012 John Wiley & Sons, Ltd. English WILEY-BLACKWELL SOLAR-CELLS THIN-FILMS MICROSTRUCTURE CUINSE2 TEXTURE NA Control of the preferred orientations of Cu(In,Ga)Se-2 films and the photovoltaic conversion efficiency using a surface-functionalized molybdenum back contact Article 10.1002/pip.2338 1 PROGRESS IN PHOTOVOLTAICS, v.22, no.1, pp.69 - 76 PROGRESS IN PHOTOVOLTAICS 22 1 69 76 scie scopus 000328248500009 2-s2.0-84890564591 Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Energy & Fuels Materials Science Physics Article SOLAR-CELLS THIN-FILMS MICROSTRUCTURE CUINSE2 TEXTURE NA CIGS solar cell trilayer back contact MoSe2 preferred orientation cell efficiency