Correlation between interface energetics and open circuit voltage in organic photovoltaic cells

A. Wilke; J. Endres; U. Hörmann; J. Niederhausen; R. Schlesinger; J. Frisch; P. Amsalem; J. Wagner; M. Gruber; A. Opitz; A. Vollmer; W. Brütting; A. Kahn; N. Koch

doi:10.1063/1.4769360

Correlation between interface energetics and open circuit voltage in organic photovoltaic cells

A. Wilke
, J. Endres
, U. Hörmann
, J. Niederhausen
, R. Schlesinger
, J. Frisch
, P. Amsalem
, J. Wagner
, M. Gruber
, A. Opitz
, A. Vollmer
, W. Brütting
, A. Kahn
, N. Koch

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

91 Scopus citations

Abstract

We have used ultraviolet and inverse photoemission spectroscopy to determine the transport gaps (E_t) of C₆₀ and diindenoperylene (DIP), and the photovoltaic gap (E_PVG) of five prototypical donor/acceptor interfaces used in organic photovoltaic cells (OPVCs). The transport gap of C₆₀ (2.5 ± 0.1) eV and DIP (2.55 ± 0.1) eV at the interface is the same as in pristine films. We find nearly the same energy loss of ca 0.5 eV for all material pairs when comparing the open circuit voltage measured for corresponding OPVCs and E_PVG.

Original language	English (US)
Article number	233301
Journal	Applied Physics Letters
Volume	101
Issue number	23
DOIs	https://doi.org/10.1063/1.4769360
State	Published - Dec 3 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4769360

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@article{200962ce0d3a4123a781b0a14c394836,

title = "Correlation between interface energetics and open circuit voltage in organic photovoltaic cells",

abstract = "We have used ultraviolet and inverse photoemission spectroscopy to determine the transport gaps (Et) of C60 and diindenoperylene (DIP), and the photovoltaic gap (EPVG) of five prototypical donor/acceptor interfaces used in organic photovoltaic cells (OPVCs). The transport gap of C60 (2.5 ± 0.1) eV and DIP (2.55 ± 0.1) eV at the interface is the same as in pristine films. We find nearly the same energy loss of ca 0.5 eV for all material pairs when comparing the open circuit voltage measured for corresponding OPVCs and EPVG.",

author = "A. Wilke and J. Endres and U. H{\"o}rmann and J. Niederhausen and R. Schlesinger and J. Frisch and P. Amsalem and J. Wagner and M. Gruber and A. Opitz and A. Vollmer and W. Br{\"u}tting and A. Kahn and N. Koch",

note = "Funding Information: The authors thank S. Krause for valuable discussion and S. Olthof and A. Dai for experimental support. We thank A. Elschner (Heraeus Clevios GmbH) for providing PEDT:PSS and J. P. Rabe (HU-Berlin) for granting access to UPS. This work was financially supported by Deutsche Forschungsgemeinschaft (DFG) through SPP1355 and SFB951, the National Science Foundation (NSF) (Grant No. DMR-1005892), and the Princeton MRSEC of the NSF (Grant No. DMR-0819860). U.H. gratefully acknowledges the Bavarian Research Foundation for financial support.",

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month = dec,

day = "3",

doi = "10.1063/1.4769360",

language = "English (US)",

volume = "101",

journal = "Applied Physics Letters",

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T1 - Correlation between interface energetics and open circuit voltage in organic photovoltaic cells

AU - Wilke, A.

AU - Endres, J.

AU - Hörmann, U.

AU - Niederhausen, J.

AU - Schlesinger, R.

AU - Frisch, J.

AU - Amsalem, P.

AU - Wagner, J.

AU - Gruber, M.

AU - Opitz, A.

AU - Vollmer, A.

AU - Brütting, W.

AU - Kahn, A.

AU - Koch, N.

N1 - Funding Information: The authors thank S. Krause for valuable discussion and S. Olthof and A. Dai for experimental support. We thank A. Elschner (Heraeus Clevios GmbH) for providing PEDT:PSS and J. P. Rabe (HU-Berlin) for granting access to UPS. This work was financially supported by Deutsche Forschungsgemeinschaft (DFG) through SPP1355 and SFB951, the National Science Foundation (NSF) (Grant No. DMR-1005892), and the Princeton MRSEC of the NSF (Grant No. DMR-0819860). U.H. gratefully acknowledges the Bavarian Research Foundation for financial support.

PY - 2012/12/3

Y1 - 2012/12/3

N2 - We have used ultraviolet and inverse photoemission spectroscopy to determine the transport gaps (Et) of C60 and diindenoperylene (DIP), and the photovoltaic gap (EPVG) of five prototypical donor/acceptor interfaces used in organic photovoltaic cells (OPVCs). The transport gap of C60 (2.5 ± 0.1) eV and DIP (2.55 ± 0.1) eV at the interface is the same as in pristine films. We find nearly the same energy loss of ca 0.5 eV for all material pairs when comparing the open circuit voltage measured for corresponding OPVCs and EPVG.

AB - We have used ultraviolet and inverse photoemission spectroscopy to determine the transport gaps (Et) of C60 and diindenoperylene (DIP), and the photovoltaic gap (EPVG) of five prototypical donor/acceptor interfaces used in organic photovoltaic cells (OPVCs). The transport gap of C60 (2.5 ± 0.1) eV and DIP (2.55 ± 0.1) eV at the interface is the same as in pristine films. We find nearly the same energy loss of ca 0.5 eV for all material pairs when comparing the open circuit voltage measured for corresponding OPVCs and EPVG.

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VL - 101

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 23

M1 - 233301

ER -

Correlation between interface energetics and open circuit voltage in organic photovoltaic cells

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