Choi, Hanseul Heo, Jin Hyuck Ha, Su Kwon, Byeong Wan Yoon, Sung Pil Han, Jonghee Kim, Woo-Sik Im, Sang Hyuk Kim, Jinsoo 2024-01-20T02:04:18Z 2024-01-20T02:04:18Z 2022-01-25 2017-02 1385-8947 https://pubs.kist.re.kr/handle/201004/123100 similar to 10 nm sized MoO2 nanoparticles with high BET surface area of 170.14 m(2)/g were synthesized via scalable new process of combining the ultrasonic spray pyrolysis and solvothermal cracking process. Initially, we synthesized polycrystalline MoO3 microparticles by the ultrasonic spray pyrolysis at 500 degrees C or 600 degrees C. Then the MoO3 microparticles were disassembled into crystalline grains and the grains were subsequently shattered to small MoO2 nanoparticles through the solvothermal polyol reduction process because the polycrystalline MoO3 microparticles are disassembled by thermal expansion and the crystalline MoO3 grains are shattered by volume shrinkage due to phase transition from MoO3 to MoO2. Finally, we applied the MoO2 nanoparticles/toluene solution to new inorganic hole transporting material for planar CH3NH3PbI3 perovskite solar cells. The planar type CH3NH3PbI3 perovskite solar cells exhibited stable efficiency of 14.8% for forward scan condition and 15.5% for reverse scan condition under illumination of 1 Sun (100 mW/cm(2)). (C) 2016 Elsevier B.V. All rights reserved. English Elsevier BV Facile scalable synthesis of MoO2 nanoparticles by new solvothermal cracking process and their application to hole transporting layer for CH3NH3PbI3 planar perovskite solar cells Article 10.1016/j.cej.2016.10.110 1 Chemical Engineering Journal, v.310, pp.179 - 186 Chemical Engineering Journal 310 179 186 N scie scopus 000390081500017 2-s2.0-84997207068 Engineering, Environmental Engineering, Chemical Engineering Article DIOXIDE-BASED ANODE OXIDE THIN-FILMS MOLYBDENUM DIOXIDE GROWTH Ultrasonic spray pyrolysis Solvothermal cracking process Molybdenum dioxides Perovskite solar cell