Unusual behaviours of photoluminescence by long-term illumination in alkoxy-substituted phenylene vinylene polymer

Bin Nal Yoon, In Hee Chang, Suk Ho Choi, Dong Hoon Choi, Min Ju Cho, Jae Hong Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have studied photo-induced effects of photoluminescence (PL) for dialkoxy phenylene vinylene polymer (P(MHPV)) films with different thickness under irradiation of 488 nm laser line. The samples show photo-induced PL enhancement or quenching depending on excitation level, temperature, and sample thickness. Increasing behaviour of PL intensity with exposure time is observed in relatively thicker samples and the rising rate of the PL intensity is larger under higher intensity of the excitation light. The increasing behaviour of PL intensity with exposure time is changed into the decreasing one at temperatures ≤200 K. It is proposed that these unusual behaviours are attributed to the chemical structural variation through degradation of the bridge double bonds linking the phenyl rings, resulting in partial disconnection of conjugation in the polymers during illumination and to the spatial diffusion of excited carriers to non-degraded P(MHPV) regions by energy transfer.

Original languageEnglish
Pages (from-to)213-216
Number of pages4
JournalSynthetic Metals
Volume150
Issue number2
DOIs
Publication statusPublished - 2005 Apr 30

Fingerprint

Photoluminescence
Polymers
Lighting
illumination
photoluminescence
polymers
conjugation
Energy transfer
excitation
Quenching
energy transfer
quenching
alkoxyl radical
Irradiation
degradation
Degradation
Temperature
irradiation
temperature
Lasers

Keywords

  • Enhancement
  • Phenylene vinylene polymer
  • Photoluminescence
  • Quenching

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Unusual behaviours of photoluminescence by long-term illumination in alkoxy-substituted phenylene vinylene polymer. / Yoon, Bin Nal; Chang, In Hee; Choi, Suk Ho; Choi, Dong Hoon; Cho, Min Ju; Kim, Jae Hong.

In: Synthetic Metals, Vol. 150, No. 2, 30.04.2005, p. 213-216.

Research output: Contribution to journalArticle

Yoon, Bin Nal ; Chang, In Hee ; Choi, Suk Ho ; Choi, Dong Hoon ; Cho, Min Ju ; Kim, Jae Hong. / Unusual behaviours of photoluminescence by long-term illumination in alkoxy-substituted phenylene vinylene polymer. In: Synthetic Metals. 2005 ; Vol. 150, No. 2. pp. 213-216.
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AU - Cho, Min Ju

AU - Kim, Jae Hong

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