✦ LIBER ✦

Influence of Excimer Behavior on Photoluminescence and Electroluminescence of a Novel Conjugated Molecule Doped in Polymer

✍ Scribed by Wang Mingliang; Zhang Junxiang; Liu Juzheng; Xu Chunxiang

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 114 KB
Volume: 153
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.2000.8760

No coin nor oath required. For personal study only.

✦ Synopsis

In6uence of excimer formation on photoluminescence and electroluminescence of a novel conjugated molecule, 1-(9-anthrylethynyl)-4-chloromethyl-2,5-dimethoxybenzene (ACDB), doped in polystyrene was investigated. The monomer emission decreased and the excimer emission increased when the concentration of ACDB in the doped 5lm was increased for photoluminescence. This resulted from the energy migration to the trapping sites of excimer. The electroluminescent device with lower concentration of ACDB in the emitting layer exhibited only the exciton emission independent of the applied voltage. The device with higher concentration exhibits exciton emission at high drive voltages but excimer emission at low drive voltages. The electric 5eld strength dependent electroluminescent behavior with higher concentration of ACDB was explained according to the 6uorescence quenching e4ects caused by the 5eld-enhanced thermal dissociation of excimer. Doping polymer is helpful in suppressing the formation of excimer.

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