Excitation induced emission color change in conjugated polymers

Raoul Schroeder; James N. Wilson; Uwe H.F. Bunz; Bruno Ullrich

doi:10.1021/jp035606z

Excitation induced emission color change in conjugated polymers

Raoul Schroeder, James N. Wilson, Uwe H.F. Bunz, Bruno Ullrich

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

7 Scopus citations

Abstract

We report the luminescence color change of poly-(2,5-dioctyl para-phenyleneethynylene) (PPE) through variations of the excitation intensity. PPE can exist in one of two phases in a chloroform solution; one is a single molecule phase, and the other is an aggregate phase, where the benzene rings of the adjacent polymer chains stack on top of each other. Only the latter exhibits the intensity dependent color change. The other shows regular photoluminescence; that is, only the emission intensity itself depends on the excitation intensity. The phase change occurs reversibly, and therefore, two ways of changing the emission color are possible. PPE will therefore contribute strongly to future color tuning applications.

Original language	English (US)
Pages (from-to)	11604-11607
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	107
Issue number	42
DOIs	https://doi.org/10.1021/jp035606z
State	Published - Oct 23 2003
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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abstract = "We report the luminescence color change of poly-(2,5-dioctyl para-phenyleneethynylene) (PPE) through variations of the excitation intensity. PPE can exist in one of two phases in a chloroform solution; one is a single molecule phase, and the other is an aggregate phase, where the benzene rings of the adjacent polymer chains stack on top of each other. Only the latter exhibits the intensity dependent color change. The other shows regular photoluminescence; that is, only the emission intensity itself depends on the excitation intensity. The phase change occurs reversibly, and therefore, two ways of changing the emission color are possible. PPE will therefore contribute strongly to future color tuning applications.",

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AU - Schroeder, Raoul

AU - Wilson, James N.

AU - Bunz, Uwe H.F.

AU - Ullrich, Bruno

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Y1 - 2003/10/23

N2 - We report the luminescence color change of poly-(2,5-dioctyl para-phenyleneethynylene) (PPE) through variations of the excitation intensity. PPE can exist in one of two phases in a chloroform solution; one is a single molecule phase, and the other is an aggregate phase, where the benzene rings of the adjacent polymer chains stack on top of each other. Only the latter exhibits the intensity dependent color change. The other shows regular photoluminescence; that is, only the emission intensity itself depends on the excitation intensity. The phase change occurs reversibly, and therefore, two ways of changing the emission color are possible. PPE will therefore contribute strongly to future color tuning applications.

AB - We report the luminescence color change of poly-(2,5-dioctyl para-phenyleneethynylene) (PPE) through variations of the excitation intensity. PPE can exist in one of two phases in a chloroform solution; one is a single molecule phase, and the other is an aggregate phase, where the benzene rings of the adjacent polymer chains stack on top of each other. Only the latter exhibits the intensity dependent color change. The other shows regular photoluminescence; that is, only the emission intensity itself depends on the excitation intensity. The phase change occurs reversibly, and therefore, two ways of changing the emission color are possible. PPE will therefore contribute strongly to future color tuning applications.

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