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Proceedings Paper

Novel characteristics of electroluminescent diodes utilizing poly(3-alkylthiophene)s and organic molecules
Author(s): Yutaka Ohmori; Masao Uchida; Chikayoshi Morishima; Akihiko Fujii; Katsumi Yoshino
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Paper Abstract

Novel characteristics of visible electroluminescent (EL) diodes utilizing poly(3- alkylthiophene)s and organic molecules with superlattice structure have been presented. The diodes with poly(3-alkylthiophene)s emit red-orange light with a broad band emission of 640 nm. The EL diode has unique characteristics in temperature dependence of emission intensity. Superlattice (SL) structure which consists of thin films of organic i-hydroxyquinoline aluminum (Alq3) and aromatic diamine (TPD) has been grown by organic molecular beam deposition. The SL structure was determined by X-ray diffraction, optical absorption and photoluminescence. Photoluminescence peak of Alq3 shifts to higher energy with decreasing layer thickness, suggesting a quantum size effect. The EL diodes with SL structure emit green light at around 520 nm. Quantum size effect in the organic SL structure has been discussed.

Paper Details

Date Published: 27 August 1993
PDF: 6 pages
Proc. SPIE 1910, Electroluminescent Materials, Devices, and Large-Screen Displays, (27 August 1993); doi: 10.1117/12.151134
Show Author Affiliations
Yutaka Ohmori, Osaka Univ. (Japan)
Masao Uchida, Osaka Univ. (Japan)
Chikayoshi Morishima, Osaka Univ. (Japan)
Akihiko Fujii, Osaka Univ. (Japan)
Katsumi Yoshino, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 1910:
Electroluminescent Materials, Devices, and Large-Screen Displays
Esther M. Conwell; Milan Stolka; M. Robert Miller, Editor(s)

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