Jung, Kyungeun Lee, Jeongwon Kim, Joosun Chae, Weon-Sik Lee, Man-Jong 2024-01-20T03:33:09Z 2024-01-20T03:33:09Z 2021-09-05 2016-08-30 0378-7753 https://pubs.kist.re.kr/handle/201004/123769 This paper reports a synergistic strategy to enhance the power conversion efficiency (PCE) of flexible planar perovskite solar cells (PSCs) by controlling the thickness of the ZnO electron transport layer (ETL), wPbl(2) phase, and size/morphology of the perovskite (MAPbI(3)) absorber layer. To optimize the size/morphology of MAPbI(3) via a two-step spin coating process, various volumes of CH3NH3I precursor solutions with a constant concentration were continuously coated, which greatly affected the grain growth condition of the MAPbI(3). In addition, the remnant PbI2 phase in the MAPbI3, which acted as a recombination barrier, was simultaneously controlled. This strategic method to synergistically combine the major factors affecting the final PCE resulted in the best efficiency of 123%, which is the highest efficiency among ZnO-ETL-based flexible planar PSCs to date. (C) 2016 Published by Elsevier B.V. English ELSEVIER LOW-TEMPERATURE THIN-FILM PERFORMANCE GROWTH DEPOSITION INTERFACE TRANSPORT LENGTHS Solution-processed flexible planar perovskite solar cells: A strategy to enhance efficiency by controlling the ZnO electron transfer layer, PbI2 phase, and CH3NH3PbI3 morphologies Article 10.1016/j.jpowsour.2016.05.026 1 JOURNAL OF POWER SOURCES, v.324, pp.142 - 149 JOURNAL OF POWER SOURCES 324 142 149 scie scopus 000380076700018 2-s2.0-84969975035 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article LOW-TEMPERATURE THIN-FILM PERFORMANCE GROWTH DEPOSITION INTERFACE TRANSPORT LENGTHS CH3NH3PbI3 Flexible planar perovskite solar cell ZnO electron transfer layer Two-step spin coating process Light harvesting efficiency