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Proceedings Paper

LED characterization of an alternating copolymer and its blends
Author(s): Dong Young Kim; Jai Kyeong Kim; Hyun Nam Cho; Chung Yup Kim
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Paper Abstract

Soluble light-emission alternating copolymers based on alkyfluorene and bis-phenylenevinylene were synthesized using Wittig coupling reaction. The PL and EL efficiency of emissive polymers increased in the blends diluted with non- emissive polymer such a PVK. The emission spectrum of the blends also became narrower than that of emissive polymer only due to the reduction of intermolecular excimer formation. The blends of emissive polymers with different band-gap energies were investigated in terms of energy transfer mechanisms. The characteristics of emissive polymer with lower band-gap energy dominates the PL and EL spectrum of blends. The quantum efficiency in the order of 0.025 percent was obtained the electrodes of ITO and aluminum.

Paper Details

Date Published: 1 December 1997
PDF: 8 pages
Proc. SPIE 3148, Organic Light-Emitting Materials and Devices, (1 December 1997); doi: 10.1117/12.279324
Show Author Affiliations
Dong Young Kim, Korea Institute of Science and Technology (South Korea)
Jai Kyeong Kim, Korea Institute of Science and Technology (South Korea)
Hyun Nam Cho, Korea Institute of Science and Technology (South Korea)
Chung Yup Kim, Korea Institute of Science and Technology (South Korea)

Published in SPIE Proceedings Vol. 3148:
Organic Light-Emitting Materials and Devices
Zakya H. Kafafi, Editor(s)

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