Chae, Sang Youn Park, Se Jin Joo, Oh-Shim Min, Byoung Koun Hwang, Yun Jeong 2024-01-20T03:30:29Z 2024-01-20T03:30:29Z 2021-09-05 2016-10 0038-092X https://pubs.kist.re.kr/handle/201004/123625 A tandem solar cell equipped with a dye-sensitized solar cell (DSSC) and a Culn(x)Ga(1-x)S(y)Se(1-y) (CIGS) bottom sub-cell was assessed for photovoltaic cell (PV)-assisted water splitting application. Two types of cobalt complexes ([Co(bpy)(3)](2+/3+) and [Co(phen)(3)](2+/3+)) were tested as the redox couples in the DSSC sub-cell. Of these, [Co(phen)(3)](2+/3)+ showed a larger open circuit potential and higher power conversion efficiency for the DSSC/CIGS tandem cell with high stability due to its more positive redox potential. Two unit cells of the DSSC/CIGS tandem cell were assembled as a module to supply sufficient power for water electrolysis. Spontaneous solar water splitting was realized when the DSSC/CIGS module was connected to a stainless steel anode and a platinum cathode. The [Co(phen)(3)](2+/3+) redox couple in the tandem cell was found to have high solar to hydrogen conversion efficiency (eta(STH) = 4.65%) in the PV-assisted electrolysis cell. (C) 2016 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD REDOX COUPLES EFFICIENCY Spontaneous solar water splitting by DSSC/CIGS tandem solar cells Article 10.1016/j.solener.2016.06.058 1 SOLAR ENERGY, v.135, pp.821 - 826 SOLAR ENERGY 135 821 826 scie scopus 000382793500084 2-s2.0-84976647658 Energy & Fuels Energy & Fuels Article REDOX COUPLES EFFICIENCY DSSC/CIGS tandem cell Stability Cobalt based electrolyte PV-electrolysis