Pandey, Rina Lim, Ju Won Kim, Jung Hyuk Angadi, Basavaraj Choi, Ji Won Choi, Won Kook 2024-01-19T22:31:42Z 2024-01-19T22:31:42Z 2021-09-03 2018-06-30 0169-4332 https://pubs.kist.re.kr/handle/201004/121233 In this study, Iridium (Ir) metallic layer as an ultra-thin surface modifier (USM) was deposited on ITO coated glass substrate using radio frequency magnetron sputtering for improving the photo-conversion efficiency of organic photovoltaic cells. Ultra-thin Ir acts as a surface modifier replacing the conventional hole transport layer (HTL) PEDOT:PSS in organic photovoltaic (OPV) cells with two different active layers P3HT:PC60BM and PTB7:PC70BM. The Ir USM (1.0 nm) coated on ITO glass substrate showed transmittance of 84.1% and work function of >5.0 eV, which is higher than that of ITO (4.5-4.7 eV). The OPV cells with Ir USM (1.0 nm) exhibits increased power conversion efficiency of 3.70% (for P3HT:PC60BM active layer) and 7.28% (for PTB7:PC70BM active layer) under 100 mW/cm(2) illumination (AM 1.5G) which are higher than those of 3.26% and 6.95% for the same OPV cells but with PEDOT:PSS as HTL instead of Ir USM. The results reveal that the chemically stable Ir USM layer could be used as an alternative material for PEDOT:PSS in organic photovoltaic cells. (C) 2018 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV HOLE TRANSPORT LAYER INDIUM-TIN-OXIDE TRANSITION-METAL OXIDES OPTOELECTRONIC DEVICES WORK FUNCTION EFFICIENT FILMS INJECTION NANOPARTICLES ELECTRONICS Performance enhancement in organic photovoltaic solar cells using iridium (Ir) ultra-thin surface modifier (USM) Article 10.1016/j.apsusc.2018.03.012 1 APPLIED SURFACE SCIENCE, v.444, pp.97 - 104 APPLIED SURFACE SCIENCE 444 97 104 scie scopus 000429343200013 2-s2.0-85043463400 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article HOLE TRANSPORT LAYER INDIUM-TIN-OXIDE TRANSITION-METAL OXIDES OPTOELECTRONIC DEVICES WORK FUNCTION EFFICIENT FILMS INJECTION NANOPARTICLES ELECTRONICS Organic photovoltaic&apos s cells P3HT:PC60BM and PTB7:PC70BM Iridium (Ir) and power conversion efficiency (PCE)