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Universal Elaboration of Al‐Doped TiO 2 as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells
Author(s) -
Kim Jun Young,
Rhee Seunghyun,
Lee Hyunho,
An Kunsik,
Biswas Swarup,
Lee Yongju,
Shim Jae Won,
Lee Changhee,
Kim Hyeok
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201902003
Subject(s) - materials science , doping , perovskite (structure) , organic solar cell , hybrid solar cell , oxide , active layer , layer (electronics) , extraction (chemistry) , band gap , photovoltaic system , chemical engineering , nanotechnology , optoelectronics , energy conversion efficiency , polymer solar cell , composite material , metallurgy , polymer , chemistry , organic chemistry , ecology , thin film transistor , engineering , biology
Fabricating an electron extraction layer (EEL) with a metal doping transition metal oxide (TMO) in inorganic–organic hybrid perovskite solar cells (PeSCs) and organic solar cells (OSCs) is a simple and efficient process for enhancing photovoltaic properties. Here, the universal benefits and common factors that influence both PeSCs and OSCs as a result of changes in Al‐doped TiO 2 properties are investigated. These common factors are identified in two separate mechanisms. The first involves surface smoothing of TiO 2 films, which affects the formation of a high crystalline active layer and reduces recombination between the electron extraction and active layers. The second involves bandgap widening of TiO 2 , which reduces the activation energy and enhances the quenching efficiency of devices. These factors are demonstrated in various measurements. The results will help in understanding the fundamental benefits of Al‐doped TiO 2 in solution‐processed thin‐film solar cells.