Koo, Bonkee Jung, Heesuk Park, Minwoo Kim, Jae-Yup Son, Hae Jung Cho, Jinhan Ko, Min Jae 2024-01-20T03:33:35Z 2024-01-20T03:33:35Z 2021-09-05 2016-08 1616-301X https://pubs.kist.re.kr/handle/201004/123792 Organo-lead halide perovskite solar cells (PSCs) have received great attention because of their optimized optical and electrical properties for solar cell applications. Recently, a dramatic increase in the photovoltaic performance of PSCs with organic hole transport materials (HTMs) has been reported. However, as of now, future commercialization can be hampered because the stability of PSCs with organic HTM has not been guaranteed for long periods under conventional working conditions, including moist conditions. Furthermore, conventional organic HTMs are normally expensive because material synthesis and purification are complicated. It is herein reported, for the first time, octadecylamine-capped pyrite nanoparticles (ODA-FeS2 NPs) as a bi-functional layer (charge extraction layer and moisture-proof layer) for organo-lead halide PSCs. FeS2 is a promising candidate for the HTM of PSCs because of its high conductivity and suitable energy levels for hole extraction. A bi-functional layer based on ODA-FeS2 NPs shows excellent hole transport ability and moisture-proof performance. Through this approach, the best-performing device with ODA-FeS2 NPs-based bi-functional layer shows a power conversion efficiency of 12.6% and maintains stable photovoltaic performance in 50% relative humidity for 1000 h. As a result, this study has the potential to break through the barriers for the commercialization of PSCs. English John Wiley & Sons Ltd. Pyrite-Based Bi-Functional Layer for Long-Term Stability and High-Performance of Organo-Lead Halide Perovskite Solar Cells Article 10.1002/adfm.201601119 1 Advanced Functional Materials, v.26, no.30, pp.5400 - 5407 Advanced Functional Materials 26 30 5400 5407 N scie scopus 000382546600002 2-s2.0-84977072508 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article INORGANIC HOLE CONDUCTOR HIGH-EFFICIENCY HETEROJUNCTION NANOCRYSTALS PHASE TRANSFORMATION TRANSPARENT EXCHANGE GROWTH STATE hole transport material long-term stability organo-lead halide perovskite solar cells pyrite (FeS2) nanoparticles surface hydrophobicity