NiOX/MoO3 Bi-layers as efficient hole extraction contacts in organic solar cells

Philip Schulz; Sarah R. Cowan; Ze Lei Guan; Andres Garcia; Dana C. Olson; Antoine Kahn

doi:10.1002/adfm.201302477

NiO_X/MoO₃ Bi-layers as efficient hole extraction contacts in organic solar cells

Philip Schulz, Sarah R. Cowan, Ze Lei Guan, Andres Garcia, Dana C. Olson, Antoine Kahn

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

The electronic structure of a bi-layer hole extraction contact consisting of nickel oxide (NiO_x) and molybdenum trioxide (MoO₃) 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/PC₇₁BM leads to improved device performance, which is explained by an intricate charge transfer process across the interface. Nickel oxide/molybdenum oxide bi-layers enhance hole collection in organic photovoltaic devices. Device improvement in PCDTBT:PC71BM based solar cells is attributed to the electronic structure of the oxide interlayer. The electron blocking capability of NiO_x is combined with the high work function of MoO₃, which enable efficient coupling of the electrode to the hole transport level in the polymer.

Original language	English (US)
Pages (from-to)	701-706
Number of pages	6
Journal	Advanced Functional Materials
Volume	24
Issue number	5
DOIs	https://doi.org/10.1002/adfm.201302477
State	Published - Feb 5 2014

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Chemistry
Condensed Matter Physics
General Materials Science
Electrochemistry
Biomaterials

Keywords

charge transport
electronic structure
organic electronics
photovoltaic devices

Access to Document

10.1002/adfm.201302477

Cite this

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title = "NiOX/MoO3 Bi-layers as efficient hole extraction contacts in organic solar cells",

abstract = "The electronic structure of a bi-layer hole extraction contact consisting of nickel oxide (NiOx) and molybdenum trioxide (MoO3) 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 NiOx/MoO 3 bi-layer as the anode of organic bulk heterojunction solar cells based on PCDTBT/PC71BM leads to improved device performance, which is explained by an intricate charge transfer process across the interface. Nickel oxide/molybdenum oxide bi-layers enhance hole collection in organic photovoltaic devices. Device improvement in PCDTBT:PC71BM based solar cells is attributed to the electronic structure of the oxide interlayer. The electron blocking capability of NiOx is combined with the high work function of MoO3, which enable efficient coupling of the electrode to the hole transport level in the polymer.",

keywords = "charge transport, electronic structure, organic electronics, photovoltaic devices",

author = "Philip Schulz and Cowan, {Sarah R.} and Guan, {Ze Lei} and Andres Garcia and Olson, {Dana C.} and Antoine Kahn",

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AU - Schulz, Philip

AU - Cowan, Sarah R.

AU - Guan, Ze Lei

AU - Garcia, Andres

AU - Olson, Dana C.

AU - Kahn, Antoine

PY - 2014/2/5

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N2 - The electronic structure of a bi-layer hole extraction contact consisting of nickel oxide (NiOx) and molybdenum trioxide (MoO3) 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 NiOx/MoO 3 bi-layer as the anode of organic bulk heterojunction solar cells based on PCDTBT/PC71BM leads to improved device performance, which is explained by an intricate charge transfer process across the interface. Nickel oxide/molybdenum oxide bi-layers enhance hole collection in organic photovoltaic devices. Device improvement in PCDTBT:PC71BM based solar cells is attributed to the electronic structure of the oxide interlayer. The electron blocking capability of NiOx is combined with the high work function of MoO3, which enable efficient coupling of the electrode to the hole transport level in the polymer.

AB - The electronic structure of a bi-layer hole extraction contact consisting of nickel oxide (NiOx) and molybdenum trioxide (MoO3) 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 NiOx/MoO 3 bi-layer as the anode of organic bulk heterojunction solar cells based on PCDTBT/PC71BM leads to improved device performance, which is explained by an intricate charge transfer process across the interface. Nickel oxide/molybdenum oxide bi-layers enhance hole collection in organic photovoltaic devices. Device improvement in PCDTBT:PC71BM based solar cells is attributed to the electronic structure of the oxide interlayer. The electron blocking capability of NiOx is combined with the high work function of MoO3, which enable efficient coupling of the electrode to the hole transport level in the polymer.

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