Unique luminescence properties of Eu3+-doped polyimide

Takayuki Ishizaka, Hitoshi Kasai, Hidetoshi Oikawa, Hachiro Nakanishi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Luminescence properties of Eu3+-doped 6FDA-6F polyamic acid (PAA) and polyimide (PI) films were investigated. Eu3+-doped PAA films showed a luminescence assigned to Eu3+ just after preparation. However, the luminescence intensity decreased with increases in UV-irradiation treatment time. On the other hand, Eu3+-doped PI films showed unique luminescence properties. The films showed no luminescence just after preparation. However, the luminescence intensity ascribed to Eu3+ increased with increases in the UV-irradiation treatment time. In contrast, the luminescence intensity decreased with elevation of the heat-treatment temperature and disappeared at 220 °C. After the luminescence vanished, the luminescence intensity again increased with increases in the UV-irradiation treatment time. The luminescence of the matrix similarly changed upon UV-irradiation and thermal treatment. It is proposed that luminescence properties of Eu3+doped PI films is based on a reversible changes in the luminescence of the matrix caused by UV-irradiation and thermal treatment, resulting in changes in the luminescence of Eu3+ due to the energy transfer from the matrix to Eu3+.

Original languageEnglish
Pages (from-to)280-284
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume183
Issue number3
DOIs
Publication statusPublished - 2006 Oct 25

Keywords

  • Luminescence
  • Polyimide
  • Rare earth ion
  • Recording medium
  • UV-induced luminescence enhancement

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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