Novel blue-greenish electroluminescent poly(fluorenevinylene-alt- dibenzothiophenevinylene)s and their model compounds

John A. Mikroyannidis, Helen A. Moshopoulou, John A. Anastasopoulos, Minas M. Stylianakis, Larysa Fenenko, Chihaya Adachi

Research output: Contribution to journalArticle

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Abstract

Poly(9,9-dihexylfluorene-2,7-vinylene-alt-dibenzothiophene-2,8-vinylene) (PS) and poly(9,9-dihexylfluorene-2,7-vinylene-alt-dibenzothiophene-5,5-dioxide- 2,8-vinylene) (PSO) as well as corresponding model compounds were synthesized by Heck coupling. Both the polymers and model compounds were readily soluble in common organic solvents such as tetrahydrofuran, dichloromethane, chloroform, and toluene. The polymers showed a decomposition temperature at ∼430°C and a char yield of about 65% at 800°C in N2. The glass-transition temperatures of the polymers were almost identical (75-77°C) and higher than those of the model compounds (26-45°C). All samples absorbed around 390 nm, and their optical band gaps were 2.69-2.85 eV. They behaved as blue-greenish light emitting materials in both solutions and thin films, with photoluminescence emission maxima at 450-483 nm and photoluminescence quantum yields of 0.52-0.72 in solution. Organic light-emitting diodes with an indium tin oxide/ poly(ethylene dioxythiophene):poly(styrene sulfonic acid)/polymer/Mg:Ag/Ag configuration with polymers PS and PSO as emitting layers showed green electroluminescence with maxima at 530 and 540 nm, respectively.

Original languageEnglish
Pages (from-to)6790-6800
Number of pages11
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume44
Issue number23
DOIs
Publication statusPublished - Dec 1 2006

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Polymers
Particle swarm optimization (PSO)
Photoluminescence
Styrene
Sulfonic Acids
Methylene Chloride
Optical band gaps
Dichloromethane
Electroluminescence
Toluene
Organic light emitting diodes (OLED)
Quantum yield
Chloroform
Chlorine compounds
Tin oxides
Indium
Organic solvents
Ethylene
Decomposition
Thin films

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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Novel blue-greenish electroluminescent poly(fluorenevinylene-alt- dibenzothiophenevinylene)s and their model compounds. / Mikroyannidis, John A.; Moshopoulou, Helen A.; Anastasopoulos, John A.; Stylianakis, Minas M.; Fenenko, Larysa; Adachi, Chihaya.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 44, No. 23, 01.12.2006, p. 6790-6800.

Research output: Contribution to journalArticle

Mikroyannidis, John A. ; Moshopoulou, Helen A. ; Anastasopoulos, John A. ; Stylianakis, Minas M. ; Fenenko, Larysa ; Adachi, Chihaya. / Novel blue-greenish electroluminescent poly(fluorenevinylene-alt- dibenzothiophenevinylene)s and their model compounds. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2006 ; Vol. 44, No. 23. pp. 6790-6800.
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