Photocurrent enhancement in polymer:Fullerene bulk heterojunction solar cells doped with a phosphorescent molecule

Barry P. Rand; Claudio Girotto; Alexander Mityashin; Afshin Hadipour; Jan Genoe; Paul Heremans

doi:10.1063/1.3257383

Photocurrent enhancement in polymer:Fullerene bulk heterojunction solar cells doped with a phosphorescent molecule

Barry P. Rand, Claudio Girotto, Alexander Mityashin, Afshin Hadipour, Jan Genoe, Paul Heremans

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

33 Scopus citations

Abstract

We demonstrate photocurrent enhancement of up to 20% in polymer:fullerene bulk heterojunction photovoltaic cells via the incorporation of a phosphorescent dopant, without degradation in the open-circuit voltage or fill factor of the device. The enhancement is shown to originate from multiple sources. First, the phosphor is able to populate the long-lived triplet state of the polymer, leading to longer diffusion length and a larger polymer contribution. Also, there is direct absorption on the dopant leading to enhanced spectral coverage. Finally, the dopant acts as a donor site and therefore increases the fullerene signal.

Original language	English (US)
Article number	173304
Journal	Applied Physics Letters
Volume	95
Issue number	17
DOIs	https://doi.org/10.1063/1.3257383
State	Published - 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3257383

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title = "Photocurrent enhancement in polymer:Fullerene bulk heterojunction solar cells doped with a phosphorescent molecule",

abstract = "We demonstrate photocurrent enhancement of up to 20% in polymer:fullerene bulk heterojunction photovoltaic cells via the incorporation of a phosphorescent dopant, without degradation in the open-circuit voltage or fill factor of the device. The enhancement is shown to originate from multiple sources. First, the phosphor is able to populate the long-lived triplet state of the polymer, leading to longer diffusion length and a larger polymer contribution. Also, there is direct absorption on the dopant leading to enhanced spectral coverage. Finally, the dopant acts as a donor site and therefore increases the fullerene signal.",

author = "Rand, {Barry P.} and Claudio Girotto and Alexander Mityashin and Afshin Hadipour and Jan Genoe and Paul Heremans",

note = "Funding Information: The authors thank the European Community{\textquoteright}s Seventh Framework Programme (FP7/2007-2013) under Grant No. 212311 (ONE-P) for financial support of this work.",

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journal = "Applied Physics Letters",

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T1 - Photocurrent enhancement in polymer:Fullerene bulk heterojunction solar cells doped with a phosphorescent molecule

AU - Rand, Barry P.

AU - Girotto, Claudio

AU - Mityashin, Alexander

AU - Hadipour, Afshin

AU - Genoe, Jan

AU - Heremans, Paul

N1 - Funding Information: The authors thank the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant No. 212311 (ONE-P) for financial support of this work.

PY - 2009

Y1 - 2009

N2 - We demonstrate photocurrent enhancement of up to 20% in polymer:fullerene bulk heterojunction photovoltaic cells via the incorporation of a phosphorescent dopant, without degradation in the open-circuit voltage or fill factor of the device. The enhancement is shown to originate from multiple sources. First, the phosphor is able to populate the long-lived triplet state of the polymer, leading to longer diffusion length and a larger polymer contribution. Also, there is direct absorption on the dopant leading to enhanced spectral coverage. Finally, the dopant acts as a donor site and therefore increases the fullerene signal.

AB - We demonstrate photocurrent enhancement of up to 20% in polymer:fullerene bulk heterojunction photovoltaic cells via the incorporation of a phosphorescent dopant, without degradation in the open-circuit voltage or fill factor of the device. The enhancement is shown to originate from multiple sources. First, the phosphor is able to populate the long-lived triplet state of the polymer, leading to longer diffusion length and a larger polymer contribution. Also, there is direct absorption on the dopant leading to enhanced spectral coverage. Finally, the dopant acts as a donor site and therefore increases the fullerene signal.

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Photocurrent enhancement in polymer:Fullerene bulk heterojunction solar cells doped with a phosphorescent molecule

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