Defects and morphological concerns in electroluminescent polymers

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The degradation of luminescence in phenylenevinylene polymers is due to exciton diffusion to quenching defects. The microscopic structure of these defects is identified by in-situ vibrational spectroscopy. The authors present evidence that the defect quenching is due to charge transfer by studies on model phenylenevinylene oligomer. In the absence of defect quenchers, the authors have achieved nearly exponential photoluminescence decay with observed lifetimes > 1 ns and a fourfold increase in electroluminescence. They have also utilized picosecond laser spectroscopy to study the formation yield of emissive excitons in the polymer PPVs with different morphology. They have found that increasing polymer ... continued below

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10 p.

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Yan, M.; Rothberg, L. & Galvin, M.E. July 24, 1995.

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Description

The degradation of luminescence in phenylenevinylene polymers is due to exciton diffusion to quenching defects. The microscopic structure of these defects is identified by in-situ vibrational spectroscopy. The authors present evidence that the defect quenching is due to charge transfer by studies on model phenylenevinylene oligomer. In the absence of defect quenchers, the authors have achieved nearly exponential photoluminescence decay with observed lifetimes > 1 ns and a fourfold increase in electroluminescence. They have also utilized picosecond laser spectroscopy to study the formation yield of emissive excitons in the polymer PPVs with different morphology. They have found that increasing polymer chain separation would greatly increases the luminescent efficiency due to avoiding the interchain excitons (exciplexes). Clarification of the nature of photophysics of conjugated polymers suggests avenues for improvement in fabrication of emissive polymers and electroluminescent polymers devices.

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10 p.

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INIS; OSTI as DE95017870

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  • 27. international technical conference of the Society for the Advancement of Material and Process Engineering (SAMPE): diversity into the next century, Albuquerque, NM (United States), 9-12 Oct 1995

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  • Other: DE95017870
  • Report No.: UCRL-JC--121620
  • Report No.: CONF-951033--21
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 111907
  • Archival Resource Key: ark:/67531/metadc623089

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 24, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 18, 2016, 12:19 p.m.

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Yan, M.; Rothberg, L. & Galvin, M.E. Defects and morphological concerns in electroluminescent polymers, article, July 24, 1995; California. (digital.library.unt.edu/ark:/67531/metadc623089/: accessed December 12, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.