Vertically aligned nanostructured TiO2 photoelectrodes for high efficiency perovskite solar cells via a block copolymer template approach

Authors
Seo, Myung-SeokJeong, InyoungPark, Joon-SuhLee, JinwooHan, Il KiLee, Wan InSon, Hae JungSohn, Byeong-HyeokKo, Min Jae
Issue Date
2016-06
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.8, no.22, pp.11472 - 11479
Abstract
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.
Keywords
HALIDE PEROVSKITES; ARRAYS; PERFORMANCE; PLANAR; LIGHT; CH3NH3PBI3; TRANSPORT; NANORODS; LAYER; HALIDE PEROVSKITES; ARRAYS; PERFORMANCE; PLANAR; LIGHT; CH3NH3PBI3; TRANSPORT; NANORODS; LAYER; perovskite solar cells; block copolymer; TiO2 photoelectrode
ISSN
2040-3364
URI
https://pubs.kist.re.kr/handle/201004/124035
DOI
10.1039/c6nr01010e
Appears in Collections:
KIST Article > 2016
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