Vapor coating method using small-molecule organic surface modifiers to replace N-type metal oxide layers in inverted polymer solar cells.
We investigate a simple fabrication method for vapor coating small-molecule organic interlayers as replacements for metal oxide films. The interfacial layers, which serve both as both surface modifiers to reduce the substrate work function and electron selective layers, maximize light absorption within the active layer while improving electron transport and compatibility between the active layer and cathode, leading to a ∼22% enhancement in power conversion efficiency and similar air stability compared to devices using a ZnO layer.
School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan, 689-798, South Korea.
Hyosung
H
Choi
Hak-Beom
HB
Kim
Seo-Jin
SJ
Ko
Gi-Hwan
GH
Kim
Jin Young
JY
Kim