Carbon nanotube effects on electroluminescence and photovoltaic response in conjugated polymers

Zhihua Xu; Yue Wu; Bin Hu; Ilia N. Ivanov; David B. Geohegan

doi:10.1063/1.2152113

Carbon nanotube effects on electroluminescence and photovoltaic response in conjugated polymers

Zhihua Xu, Yue Wu, Bin Hu, Ilia N. Ivanov, David B. Geohegan

Functional Hybrid Nanomaterials

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

59 Scopus citations

Abstract

This letter reports the experimental results of enhanced electroluminescence (EL) and photovoltaic (PV) response upon doping single-wall carbon nanotubes (SWNTs) into conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1, 4-phenylenevinylene] (MEHPPV) based on single-layer light-emitting diodes. We found that the dispersed SWNTs result in two processes: charge transport and exciton dissociation at the tube-chain interface in the SWNT/polymer composites. The detailed EL and PV studies indicate that low SWNT doping concentrations mainly improve the bipolar charge injection, leading to enhanced both reverse and forward EL with reduced threshold voltage. As the SWNT doping concentration continues to increase, the interfacial exciton dissociation becomes dominated, giving rise to an increased PV response. This SWNT concentration-dependent charge transport and exciton dissociation present a pathway to individually address the dual EL and PV functionalities of SWNT-doped polymer composites by controlling the doping level of the SWNTs.

Original language	English
Article number	263118
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	87
Issue number	26
DOIs	https://doi.org/10.1063/1.2152113
State	Published - 2005

Funding

This work was supported in part by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory managed by UT Battele, LLC, for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725, the National Science Foundation (Grant No. ECS-0521474), Tennessee Advanced Materials Laboratory, and the University of Tennessee.

Funders	Funder number
Tennessee Advanced Materials Laboratory
National Science Foundation	ECS-0521474
U.S. Department of Energy	DE-AC05-00OR22725
Oak Ridge National Laboratory
University of Tennessee

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Carbon nanotube effects on electroluminescence and photovoltaic response in conjugated polymers",

abstract = "This letter reports the experimental results of enhanced electroluminescence (EL) and photovoltaic (PV) response upon doping single-wall carbon nanotubes (SWNTs) into conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1, 4-phenylenevinylene] (MEHPPV) based on single-layer light-emitting diodes. We found that the dispersed SWNTs result in two processes: charge transport and exciton dissociation at the tube-chain interface in the SWNT/polymer composites. The detailed EL and PV studies indicate that low SWNT doping concentrations mainly improve the bipolar charge injection, leading to enhanced both reverse and forward EL with reduced threshold voltage. As the SWNT doping concentration continues to increase, the interfacial exciton dissociation becomes dominated, giving rise to an increased PV response. This SWNT concentration-dependent charge transport and exciton dissociation present a pathway to individually address the dual EL and PV functionalities of SWNT-doped polymer composites by controlling the doping level of the SWNTs.",

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AU - Xu, Zhihua

AU - Wu, Yue

AU - Hu, Bin

AU - Ivanov, Ilia N.

AU - Geohegan, David B.

PY - 2005

Y1 - 2005

N2 - This letter reports the experimental results of enhanced electroluminescence (EL) and photovoltaic (PV) response upon doping single-wall carbon nanotubes (SWNTs) into conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1, 4-phenylenevinylene] (MEHPPV) based on single-layer light-emitting diodes. We found that the dispersed SWNTs result in two processes: charge transport and exciton dissociation at the tube-chain interface in the SWNT/polymer composites. The detailed EL and PV studies indicate that low SWNT doping concentrations mainly improve the bipolar charge injection, leading to enhanced both reverse and forward EL with reduced threshold voltage. As the SWNT doping concentration continues to increase, the interfacial exciton dissociation becomes dominated, giving rise to an increased PV response. This SWNT concentration-dependent charge transport and exciton dissociation present a pathway to individually address the dual EL and PV functionalities of SWNT-doped polymer composites by controlling the doping level of the SWNTs.

AB - This letter reports the experimental results of enhanced electroluminescence (EL) and photovoltaic (PV) response upon doping single-wall carbon nanotubes (SWNTs) into conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1, 4-phenylenevinylene] (MEHPPV) based on single-layer light-emitting diodes. We found that the dispersed SWNTs result in two processes: charge transport and exciton dissociation at the tube-chain interface in the SWNT/polymer composites. The detailed EL and PV studies indicate that low SWNT doping concentrations mainly improve the bipolar charge injection, leading to enhanced both reverse and forward EL with reduced threshold voltage. As the SWNT doping concentration continues to increase, the interfacial exciton dissociation becomes dominated, giving rise to an increased PV response. This SWNT concentration-dependent charge transport and exciton dissociation present a pathway to individually address the dual EL and PV functionalities of SWNT-doped polymer composites by controlling the doping level of the SWNTs.

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Carbon nanotube effects on electroluminescence and photovoltaic response in conjugated polymers

Abstract

Funding

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