Seo, Myung-Seok Jeong, Inyoung Park, Joon-Suh Lee, Jinwoo Han, Il Ki Lee, Wan In Son, Hae Jung Sohn, Byeong-Hyeok Ko, Min Jae 2024-01-20T04:03:30Z 2024-01-20T04:03:30Z 2021-09-03 2016-06 2040-3364 https://pubs.kist.re.kr/handle/201004/124035 We fabricated perovskite solar cells with enhanced device efficiency based on vertically oriented TiO2 nanostructures using a nanoporous template of block copolymers (BCPs). The dimension and shape controllability of the nanopores of the BCP template allowed for the construction of one-dimensional (1-D) TiO2 nanorods and two-dimensional (2-D) TiO2 nanowalls. The TiO2 nanorod-based perovskite solar cells showed a more efficient charge separation and a lower charge recombination, leading to better performance compared to TiO2 nanowall-based solar cells. The best solar cells employing 1-D TiO2 nanorods showed an efficiency of 15.5% with V-OC = 1.02 V, J(SC) = 20.0 mA cm(-2) and fill factor = 76.1%. Thus, TiO2 nanostructures fabricated from BCP nanotemplates could be applied to the preparation of electron transport layers for improving the efficiency of perovskite solar cells. English ROYAL SOC CHEMISTRY HALIDE PEROVSKITES ARRAYS PERFORMANCE PLANAR LIGHT CH3NH3PBI3 TRANSPORT NANORODS LAYER Vertically aligned nanostructured TiO2 photoelectrodes for high efficiency perovskite solar cells via a block copolymer template approach Article 10.1039/c6nr01010e 1 NANOSCALE, v.8, no.22, pp.11472 - 11479 NANOSCALE 8 22 11472 11479 scie scopus 000377919800019 2-s2.0-84973548702 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article HALIDE PEROVSKITES ARRAYS PERFORMANCE PLANAR LIGHT CH3NH3PBI3 TRANSPORT NANORODS LAYER perovskite solar cells block copolymer TiO2 photoelectrode