Chae, Sang Youn Park, Se Jin Han, Sung Gyu Jung, Hyejin Kim, Chae-Woong Jeong, Chaehwan Joo, Oh-Shim Min, Byoung Koun Hwang, Yun Jeong 2024-01-20T02:33:48Z 2024-01-20T02:33:48Z 2021-09-04 2016-12-07 0002-7863 https://pubs.kist.re.kr/handle/201004/123324 Chalcopyrite Cu(In,Ga)(Se,S)(2) (CIGS) semiconductors are potential candidates for use in photoelectrochemical (PEC) hydrogen generation due to their excellent optical absorption properties and high conduction band edge position. In the present research, CIGS thin film was successfully prepared on a transparent substrate (F:SnO2 glass) using a solution-based process and applied for a photocathode in solar water splitting, which shows control of the surface state associated with sulfurization/selenization process significantly influences on the PEC activity. A ZnS passivation surface layer was introduced, which effectively suppresses charge recombination by surface states of CIGS. The CIGS/ZnS/Pt photocathode exhibited highly enhanced PEC activity (similar to 24 mA.cm(-2) at -0.3 V vs RHE). The performances of our CIGS photocathode on the transparent substrate were also characterized under front/back light illumination, and the incident photon to current conversion efficiency (IPCE) drastically changed depending on the illumination directions showing decreased IPCE especially under UV region with back illumination. The slow minority carrier (electron) transportation is suggested as a limiting factor for the PEC activity of the CIGS photocathode. English AMER CHEMICAL SOC SURFACE MODIFICATION HYDROGEN EVOLUTION BIVO4 PHOTOANODES THIN-FILMS EFFICIENT LAYER CDS DRIVEN CELLS NANOPARTICLES Enhanced Photocurrents with ZnS Passivated Cu(ln,Ga)(Se,S)(2) Photocathodes Synthesized Using a Nonvacuum Process for Solar Water Splitting Article 10.1021/jacs.6b09595 1 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.138, no.48, pp.15673 - 15681 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138 48 15673 15681 scie scopus 000389623800027 2-s2.0-85003632925 Chemistry, Multidisciplinary Chemistry Article SURFACE MODIFICATION HYDROGEN EVOLUTION BIVO4 PHOTOANODES THIN-FILMS EFFICIENT LAYER CDS DRIVEN CELLS NANOPARTICLES water splitting hydrogen evolution reaction photoelectrochemistry photocathode CIGS