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2337883 
Journal Article 
Sub-Nanometer Conformal TiO2 Blocking Layer for High Efficiency Solid-State Perovskite Absorber Solar Cells 
Chandiran, AK; Yella, A; Mayer, MT; Gao, P; Nazeeruddin, MK; Grätzel, M 
2014 
Yes 
Advanced Materials
ISSN: 0935-9648
EISSN: 1521-4095 
26 
25 
4309-4312 
English 
24804647 
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 (CH3 NH3 PbI3 ) absorber based solar cells. Surpassing the existing multilayer passivation, this ultrathin sub-nanometer layer leads to a photovoltaic power conversion efficiency of 11.5%.