Synthesis, electroluminescence, and photovoltaic cells of new vinylene-copolymers with 4-(Anthracene-10-yl)-2,6-diphenylpyridine segments

John A. Mikroyannidis, Panagiotis D. Vellis, Sheng-Hsiung Yang, Chain-Shu Hsu

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Three new soluble vinylene-copolymers F, C, and P that contain 4-(anthracene-10-yl)-2,6-diphenylpyridine as common segment and fluorene, carbazole, or phenylene, respectively, as alternating segment were prepared by Heck coupling. The glass transition temperature was high for F and C (110 and 117°C), whereas was lower than 25°C for P. The polymers were stable up to ∼ 300°C. They emitted blue-green light with maximum located at wavelength of 456-550 nm, which was of the order F < C < P. The photoluminescence quantum efficiency in THF solution was ∼ 30% for F and P and only 5% for C. All three copolymers were used as active layers for polymer light emitting diodes (PLEDs) and organic photovoltaic cells. The double PLEDs with configuration of indium-tin oxide (ITO)/poly(ethylenedioxythiophene (PEDOT) : poly(styrenesulfonate)(PSS)/Copolymer F, C, or P/TPBI(1,3,5-tris(2- N-phenylbenzimidazolyl)benzene)/Ca/Al were fabricated. Copolymer P emitted green light with maximum brightness of 28 cd/m2 and a current yield of 0.85 cd/A. Organic photovoltaics with the configuration of ITO/PEDOT : PSS/ Copolymer and [6,6]-phenyl-C61-butyric acid methyl ester blend (1 : 1) /Ca/Al were also fabricated. Copolymer P showed the highest power conversion efficiency of 0.034%.

Original languageEnglish
Pages (from-to)731-739
Number of pages9
JournalJournal of Applied Polymer Science
Volume115
Issue number2
DOIs
StatePublished - 15 Jan 2010

Keywords

  • Anthracene
  • Conjugated polymers
  • HECK coupling
  • Lightemitting diodes
  • Photophysics
  • Photovoltaic cells
  • Pyridine
  • Vinylene-copolymers

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