Influence of the donor/acceptor interface on the open-circuit voltage in organic solar cells

Z. T. Liu; M. F. Lo; H. B. Wang; T. W. Ng; V. A L Roy; C. S. Lee; S. T. Lee

doi:10.1063/1.3222975

Influence of the donor/acceptor interface on the open-circuit voltage in organic solar cells

Z. T. Liu, M. F. Lo, H. B. Wang, T. W. Ng, V. A L Roy, C. S. Lee, S. T. Lee

Centre of Super-Diamond and Advanced Films

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

44 Citations (Scopus)

Abstract

The donor/acceptor interface in a standard CuPc/C₆₀ organic solar cell was modified by insertion of a thin layer of molybdenum trioxide (MoO₃). An ultrathin layer of MoO₃ between the donor and acceptor increased the open-circuit voltage (V_OC) from 0.45 to 0.85 V. The enhancement in VOC is explained by the increase in the energy level offset between the lowest unoccupied molecular orbital of the acceptor and the highest occupied molecular orbital of the donor (E^D _HOMO-E^A _LUMO). The explanation is supported by the energy level analysis of the donor/acceptor interface by ultraviolet photoemission spectroscopy and x-ray photoemission spectroscopy. © 2009 American Institute of Physics.

Original language	English
Article number	93307
Journal	Applied Physics Letters
Volume	95
Issue number	9
DOIs	https://doi.org/10.1063/1.3222975
Publication status	Published - 2009

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title = "Influence of the donor/acceptor interface on the open-circuit voltage in organic solar cells",

abstract = "The donor/acceptor interface in a standard CuPc/C60 organic solar cell was modified by insertion of a thin layer of molybdenum trioxide (MoO3). An ultrathin layer of MoO3 between the donor and acceptor increased the open-circuit voltage (VOC) from 0.45 to 0.85 V. The enhancement in VOC is explained by the increase in the energy level offset between the lowest unoccupied molecular orbital of the acceptor and the highest occupied molecular orbital of the donor (ED HOMO-EA LUMO). The explanation is supported by the energy level analysis of the donor/acceptor interface by ultraviolet photoemission spectroscopy and x-ray photoemission spectroscopy. {\textcopyright} 2009 American Institute of Physics.",

author = "Liu, {Z. T.} and Lo, {M. F.} and Wang, {H. B.} and Ng, {T. W.} and Roy, {V. A L} and Lee, {C. S.} and Lee, {S. T.}",

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T1 - Influence of the donor/acceptor interface on the open-circuit voltage in organic solar cells

AU - Liu, Z. T.

AU - Lo, M. F.

AU - Wang, H. B.

AU - Ng, T. W.

AU - Roy, V. A L

AU - Lee, C. S.

AU - Lee, S. T.

PY - 2009

Y1 - 2009

N2 - The donor/acceptor interface in a standard CuPc/C60 organic solar cell was modified by insertion of a thin layer of molybdenum trioxide (MoO3). An ultrathin layer of MoO3 between the donor and acceptor increased the open-circuit voltage (VOC) from 0.45 to 0.85 V. The enhancement in VOC is explained by the increase in the energy level offset between the lowest unoccupied molecular orbital of the acceptor and the highest occupied molecular orbital of the donor (ED HOMO-EA LUMO). The explanation is supported by the energy level analysis of the donor/acceptor interface by ultraviolet photoemission spectroscopy and x-ray photoemission spectroscopy. © 2009 American Institute of Physics.

AB - The donor/acceptor interface in a standard CuPc/C60 organic solar cell was modified by insertion of a thin layer of molybdenum trioxide (MoO3). An ultrathin layer of MoO3 between the donor and acceptor increased the open-circuit voltage (VOC) from 0.45 to 0.85 V. The enhancement in VOC is explained by the increase in the energy level offset between the lowest unoccupied molecular orbital of the acceptor and the highest occupied molecular orbital of the donor (ED HOMO-EA LUMO). The explanation is supported by the energy level analysis of the donor/acceptor interface by ultraviolet photoemission spectroscopy and x-ray photoemission spectroscopy. © 2009 American Institute of Physics.

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U2 - 10.1063/1.3222975

DO - 10.1063/1.3222975

M3 - RGC 21 - Publication in refereed journal

SN - 0003-6951

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 93307

ER -

Influence of the donor/acceptor interface on the open-circuit voltage in organic solar cells

Abstract

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