Time-resolved luminescence measurements in poly(p-phenylenevinylene)

I. D W Samuel; B. Crystall; Gary Rumbles; P. L. Burn; A. B. Holmes; R. H. Friend

doi:10.1016/0379-6779(93)91071-9

Time-resolved luminescence measurements in poly(p-phenylenevinylene)

I. D W Samuel, B. Crystall, Gary Rumbles, P. L. Burn, A. B. Holmes, R. H. Friend

National Renewable Energy Laboratory

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

81 Citations (Scopus)

Abstract

We report time-resolved measurements of photoluminescence in poly(p-phenylenevinylene) (PPV) and related polymers, using the technique of time-correlated single photon counting. We find the photoluminescence is longer lived in less-conjugated samples, and that this accounts for the higher efficiency of light-emitting devices made from less-conjugated materials. At low temperatures, the luminescence is longer lived, and at 77 K there is an interesting red shift of the emission during the first nanoseconds after photoexcitation. We consider that this arises from migration of excitons to more-conjugated (and therefore lower energy) regions of the sample.

Original language	English
Pages (from-to)	281-288
Number of pages	8
Journal	Synthetic Metals
Volume	54
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(93)91071-9
Publication status	Published - Mar 1 1993

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Materials Chemistry
Polymers and Plastics

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abstract = "We report time-resolved measurements of photoluminescence in poly(p-phenylenevinylene) (PPV) and related polymers, using the technique of time-correlated single photon counting. We find the photoluminescence is longer lived in less-conjugated samples, and that this accounts for the higher efficiency of light-emitting devices made from less-conjugated materials. At low temperatures, the luminescence is longer lived, and at 77 K there is an interesting red shift of the emission during the first nanoseconds after photoexcitation. We consider that this arises from migration of excitons to more-conjugated (and therefore lower energy) regions of the sample.",

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T1 - Time-resolved luminescence measurements in poly(p-phenylenevinylene)

AU - Samuel, I. D W

AU - Crystall, B.

AU - Rumbles, Gary

AU - Burn, P. L.

AU - Holmes, A. B.

AU - Friend, R. H.

PY - 1993/3/1

Y1 - 1993/3/1

N2 - We report time-resolved measurements of photoluminescence in poly(p-phenylenevinylene) (PPV) and related polymers, using the technique of time-correlated single photon counting. We find the photoluminescence is longer lived in less-conjugated samples, and that this accounts for the higher efficiency of light-emitting devices made from less-conjugated materials. At low temperatures, the luminescence is longer lived, and at 77 K there is an interesting red shift of the emission during the first nanoseconds after photoexcitation. We consider that this arises from migration of excitons to more-conjugated (and therefore lower energy) regions of the sample.

AB - We report time-resolved measurements of photoluminescence in poly(p-phenylenevinylene) (PPV) and related polymers, using the technique of time-correlated single photon counting. We find the photoluminescence is longer lived in less-conjugated samples, and that this accounts for the higher efficiency of light-emitting devices made from less-conjugated materials. At low temperatures, the luminescence is longer lived, and at 77 K there is an interesting red shift of the emission during the first nanoseconds after photoexcitation. We consider that this arises from migration of excitons to more-conjugated (and therefore lower energy) regions of the sample.

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