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

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

43 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.

Original language	English
Article number	093307
Journal	Applied Physics Letters
Volume	95
Issue number	9
DOIs	https://doi.org/10.1063/1.3222975
Publication status	Published - 2009
Externally published	Yes

Access to Document

10.1063/1.3222975

Cite this

@article{858b45fef98e42339aa4b12b75473fbb,

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-EALUMO). The explanation is supported by the energy level analysis of the donor/acceptor interface by ultraviolet photoemission spectroscopy and x-ray photoemission spectroscopy.",

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.}",

note = "Funding Information: The work was supported by the Research Grant Council of Hong Kong (Grant No. CityU 101707).",

year = "2009",

doi = "10.1063/1.3222975",

language = "English",

volume = "95",

number = "9",

}

TY - JOUR

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.

N1 - Funding Information: The work was supported by the Research Grant Council of Hong Kong (Grant No. CityU 101707).

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-EALUMO). The explanation is supported by the energy level analysis of the donor/acceptor interface by ultraviolet photoemission spectroscopy and x-ray photoemission spectroscopy.

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-EALUMO). The explanation is supported by the energy level analysis of the donor/acceptor interface by ultraviolet photoemission spectroscopy and x-ray photoemission spectroscopy.

UR - http://www.scopus.com/inward/record.url?scp=69949127703&partnerID=8YFLogxK

U2 - 10.1063/1.3222975

DO - 10.1063/1.3222975

M3 - Article

AN - SCOPUS:69949127703

SN - 0003-6951

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 093307

ER -

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

Abstract

Access to Document

Other files and links

Fingerprint

Cite this