Moon, Byung Joon Lee, Kyu Seung Shim, Jaeho Park, Soohyung Kim, Se Ho Bae, Sukang Park, Min Lee, Chang-Lyoul Choi, Won Kook Yi, Yeonjin Hwang, Jun Yeon Son, Dong Ick 2024-01-20T05:02:21Z 2024-01-20T05:02:21Z 2021-09-05 2016-02 2211-2855 https://pubs.kist.re.kr/handle/201004/124447 Recently, interfacial engineering approaches as an efficient strategy for improving the power conversion efficiencies (PCEs) of inverted polymer solar cells (iPSCs) has attracted considerable attention. Among various efficient solutions, solution-processed metal-oxide films prepared from metal oxide sol-gel precursors (or nanoparticles) and polymer surface modifiers are typically used as electron selective interfaces in the inverted cell geometry. To present a more effective strategy for surpassing the limitations of traditional methods, such as an unintended increase in series or contact resistance by incompatibility at the organic/inorganic interface, inherently insulating nature of non-conjugated surface modifiers and oxygen adsorption (or photo-induced doping) of metal-oxide layer, we synthesize chemically surface-modified ZnO@graphene core-shell type quantum dots (ZGQDs) with well-characterization of the chemical, optical and electrical properties, and fabricate iPSCs consisting of ITO/PEIE/ZGQD-OAs/photoactive layer/MoO3/Ag. The mono-layered QDs play the multi-functional role as surface modifier, sub-photosensitizer and electron transport layer. Using this effective approach, we achieve the highest conversion efficiency of similar to 10.3% resulting from improved interfacial properties and efficient charge transfer based on static quenching and charge transfer reaction from ZnO to graphene nanosheets (with drastically reduced tau(avg) (similar to 60 ps)), which is verified by various analysis tools. (C) 2015 Elsevier Ltd. All rights reserved. English ELSEVIER HIGHLY EFFICIENT OXIDE INTERFACE STABILITY DEGRADATION LAYER ACID Enhanced photovoltaic performance of inverted polymer solar cells utilizing versatile chemically functionalized ZnO@graphene quantum dot monolayer Article 10.1016/j.nanoen.2015.11.039 1 NANO ENERGY, v.20, pp.221 - 232 NANO ENERGY 20 221 232 scie scopus 000370468300024 2-s2.0-84954123173 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article HIGHLY EFFICIENT OXIDE INTERFACE STABILITY DEGRADATION LAYER ACID Photovoltaic Inverted polymer solar cells Functionalized ZnO@graphene Quantum dot Monolayer