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NiO X /MoO 3 Bi‐Layers as Efficient Hole Extraction Contacts in Organic Solar Cells
Author(s) -
Schulz Philip,
Cowan Sarah R.,
Guan ZeLei,
Garcia Andres,
Olson Dana C.,
Kahn Antoine
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201302477
Subject(s) - materials science , non blocking i/o , heterojunction , molybdenum trioxide , photoemission spectroscopy , layer (electronics) , organic solar cell , ultraviolet , extraction (chemistry) , oxide , anode , optoelectronics , molybdenum , analytical chemistry (journal) , chemical engineering , nanotechnology , x ray photoelectron spectroscopy , chemistry , metallurgy , electrode , polymer , composite material , catalysis , biochemistry , chromatography , engineering
The electronic structure of a bi‐layer hole extraction contact consisting of nickel oxide (NiO x ) and molybdenum trioxide (MoO 3 ) is determined via ultraviolet and X‐ray photoemission spectroscopy. The bi‐layer presents ideal energetics for the extraction of holes and suppression of carrier recombination at the interface. The application of the NiO x /MoO 3 bi‐layer as the anode of organic bulk heterojunction solar cells based on PCDTBT/PC 71 BM leads to improved device performance, which is explained by an intricate charge transfer process across the interface.