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Sub‐Nanometer Conformal TiO 2 Blocking Layer for High Efficiency Solid‐State Perovskite Absorber Solar Cells
Author(s) -
Chandiran Aravind Kumar,
Yella Aswani,
Mayer Matthew T.,
Gao Peng,
Nazeeruddin Mohammad Khaja,
Grätzel Michael
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201306271
Subject(s) - overlayer , passivation , materials science , perovskite (structure) , energy conversion efficiency , layer (electronics) , blocking (statistics) , photovoltaic system , nanometre , nanotechnology , deposition (geology) , solid state , atomic layer deposition , optoelectronics , engineering physics , chemical engineering , computer science , electrical engineering , composite material , paleontology , chemistry , sediment , engineering , biology , computer network
A mere 2 nm conformal titanium dioxide overlayer coated by atomic layer deposition is shown to act as a blocking layer for high‐efficiency solid‐state perovskite (CH 3 NH 3 PbI 3 ) absorber‐based solar cells. Surpassing the existing multilayer passivation, this ultrathin sub‐nanometer layer leads to a photovoltaic power conversion efficiency of 11.5%.