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Journal of Polymer Research
Published in: Journal of Polymer Research 6/2015

01-06-2015 | Original Paper

Photomodulation spectrum of phenyl-substituted ladder-type poly(para-phenylene) under hydrostatic pressure

Authors: Che-Hung Hsu, Shu-Chun Yang

Published in: Journal of Polymer Research | Issue 6/2015

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Abstract

The pressure-dependence photomodulation spectrum of a semiconducting conjugated polymer, phenyl-substituted ladder-type poly(para-phenylene) (Ph-LPPP) with trace-concentrations of metallic impurities, was studied. The so called photo-induced absorption gave the information about the triplet-triplet (TT) transitions and bleaching (PB) of the singlet state in this material. Planarization, therefore, stronger interchain interaction, under pressure was observed. The photo-modulation spectra coupled with Raman scattering and photoluminescence spectra of Ph-LPPP revealed the influence of electronic structure due to pressure on singlet and triplet excitons. As a result, the localized character of triplet state could be changed. The lifetimes of the triplet excitions and the photobleaching were also observed. It was found that the triplet state was less stable than the singlet state.
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Metadata
Title
Photomodulation spectrum of phenyl-substituted ladder-type poly(para-phenylene) under hydrostatic pressure
Authors
Che-Hung Hsu
Shu-Chun Yang
Publication date
01-06-2015
Publisher
Springer Netherlands
Published in
Journal of Polymer Research / Issue 6/2015
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-015-0752-0

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