Novel characteristics of electroluminescent diodes utilizing poly(3-alkylthiophene)s and organic molecules

Yutaka Ohmori; Masao Uchida; Chikayoshi Morishima; Akihiko Fujii; Katsumi Yoshino

doi:10.1117/12.151134

27 August 1993 Novel characteristics of electroluminescent diodes utilizing poly(3-alkylthiophene)s and organic molecules

Yutaka Ohmori, Masao Uchida, Chikayoshi Morishima, Akihiko Fujii, Katsumi Yoshino

Author Affiliations +

Proceedings Volume 1910, Electroluminescent Materials, Devices, and Large-Screen Displays; (1993) https://doi.org/10.1117/12.151134
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

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.

Citation Download Citation

Yutaka Ohmori, Masao Uchida, Chikayoshi Morishima, Akihiko Fujii, and Katsumi Yoshino "Novel characteristics of electroluminescent diodes utilizing poly(3-alkylthiophene)s and organic molecules", Proc. SPIE 1910, Electroluminescent Materials, Devices, and Large-Screen Displays, (27 August 1993); https://doi.org/10.1117/12.151134

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