Photodegradation-induced photoluminescence behaviors of π-conjugated polymers upon the doping of organometallic triplet emitters

Jungyun Chang, Young Jun Yu, Jung Hoon Na, Jongdeok An, Chan Im, Dong Hoon Choi, Jung Il Jin, Seung Hee Lee, Young Kwan Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The different effects on the photodegradation-induced photoluminescence (PL) of π-conjugated polymeric thin films upon the doping of Ir(III) containing triplet emitters in ambient conditions at room temperature were investigated. In this study, we prepared spin-coated thin films using three different polymer matrices including poly(9-vinylcarbazole) (PVK), poly[9,9-bis(2-ethylhexyl)fluorene-2,7-diyl] (PF2/6), and poly[2-(5′- cyano-5′-methyl-hexyloxy)-1,4-phenylene] (CNPPP) derivatives doped with (III) containing triplet emitters: Ir(III) bis[(4,6-fluorophenyl)-pyridinato-N, C2′] picolinate (FIrpic), or Ir(III)fac-tris(2-phenylpyridine) (Ir(ppy)3), or Ir(III)bis(2-(2′-benzothienyl) pyridinato-N-acetylacetonate) (Ir(btp)2acac). Using the doped films, and their neat films, on quartz substrates, the UV-Visible absorption (UV-Vis) and PL spectra were recorded under continuous illumination with the excitation wavelengths at the absorption maxima of the corresponding matrix polymers. The dopant effects on the photodegradation-induced PL were extracted from the kinetic data obtained from the doped films by subtracting the mutual degradation kinetics of their corresponding neat films. The obtained dopant effects show a strong correlation between the photo-induced PL degradation and the exciton migration behaviors.

Original languageEnglish
Pages (from-to)2395-2403
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume46
Issue number22
DOIs
Publication statusPublished - 2008 Nov 15

Fingerprint

Conjugated polymers
Photodegradation
Organometallics
Photoluminescence
emitters
Doping (additives)
photoluminescence
polymers
Polymer matrix
degradation
Degradation
Thin films
Quartz
Kinetics
kinetics
matrices
thin films
Polymer films
Excitons
quartz

Keywords

  • Blending
  • Conjugated polymer
  • Degradation
  • Light-emitting diodes (OLED)
  • Luminescence

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Photodegradation-induced photoluminescence behaviors of π-conjugated polymers upon the doping of organometallic triplet emitters. / Chang, Jungyun; Yu, Young Jun; Na, Jung Hoon; An, Jongdeok; Im, Chan; Choi, Dong Hoon; Jin, Jung Il; Lee, Seung Hee; Kim, Young Kwan.

In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 46, No. 22, 15.11.2008, p. 2395-2403.

Research output: Contribution to journalArticle

Chang, Jungyun ; Yu, Young Jun ; Na, Jung Hoon ; An, Jongdeok ; Im, Chan ; Choi, Dong Hoon ; Jin, Jung Il ; Lee, Seung Hee ; Kim, Young Kwan. / Photodegradation-induced photoluminescence behaviors of π-conjugated polymers upon the doping of organometallic triplet emitters. In: Journal of Polymer Science, Part B: Polymer Physics. 2008 ; Vol. 46, No. 22. pp. 2395-2403.
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AU - Chang, Jungyun

AU - Yu, Young Jun

AU - Na, Jung Hoon

AU - An, Jongdeok

AU - Im, Chan

AU - Choi, Dong Hoon

AU - Jin, Jung Il

AU - Lee, Seung Hee

AU - Kim, Young Kwan

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N2 - The different effects on the photodegradation-induced photoluminescence (PL) of π-conjugated polymeric thin films upon the doping of Ir(III) containing triplet emitters in ambient conditions at room temperature were investigated. In this study, we prepared spin-coated thin films using three different polymer matrices including poly(9-vinylcarbazole) (PVK), poly[9,9-bis(2-ethylhexyl)fluorene-2,7-diyl] (PF2/6), and poly[2-(5′- cyano-5′-methyl-hexyloxy)-1,4-phenylene] (CNPPP) derivatives doped with (III) containing triplet emitters: Ir(III) bis[(4,6-fluorophenyl)-pyridinato-N, C2′] picolinate (FIrpic), or Ir(III)fac-tris(2-phenylpyridine) (Ir(ppy)3), or Ir(III)bis(2-(2′-benzothienyl) pyridinato-N-acetylacetonate) (Ir(btp)2acac). Using the doped films, and their neat films, on quartz substrates, the UV-Visible absorption (UV-Vis) and PL spectra were recorded under continuous illumination with the excitation wavelengths at the absorption maxima of the corresponding matrix polymers. The dopant effects on the photodegradation-induced PL were extracted from the kinetic data obtained from the doped films by subtracting the mutual degradation kinetics of their corresponding neat films. The obtained dopant effects show a strong correlation between the photo-induced PL degradation and the exciton migration behaviors.

AB - The different effects on the photodegradation-induced photoluminescence (PL) of π-conjugated polymeric thin films upon the doping of Ir(III) containing triplet emitters in ambient conditions at room temperature were investigated. In this study, we prepared spin-coated thin films using three different polymer matrices including poly(9-vinylcarbazole) (PVK), poly[9,9-bis(2-ethylhexyl)fluorene-2,7-diyl] (PF2/6), and poly[2-(5′- cyano-5′-methyl-hexyloxy)-1,4-phenylene] (CNPPP) derivatives doped with (III) containing triplet emitters: Ir(III) bis[(4,6-fluorophenyl)-pyridinato-N, C2′] picolinate (FIrpic), or Ir(III)fac-tris(2-phenylpyridine) (Ir(ppy)3), or Ir(III)bis(2-(2′-benzothienyl) pyridinato-N-acetylacetonate) (Ir(btp)2acac). Using the doped films, and their neat films, on quartz substrates, the UV-Visible absorption (UV-Vis) and PL spectra were recorded under continuous illumination with the excitation wavelengths at the absorption maxima of the corresponding matrix polymers. The dopant effects on the photodegradation-induced PL were extracted from the kinetic data obtained from the doped films by subtracting the mutual degradation kinetics of their corresponding neat films. The obtained dopant effects show a strong correlation between the photo-induced PL degradation and the exciton migration behaviors.

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KW - Light-emitting diodes (OLED)

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