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Electrical and Emitting Properties of Organic Electroluminescent Diodes with Nanostructured Cathode Buffer-Layers of Al/Alq3 Ultrathin Films

Kazunari SHINBO, Eigo SAKAI, Futao KANEKO, Keizo KATO, Takahiro KAWAKAMI, Toyoyasu TADOKORO, Shinichi OHTA, Rigoberto C. ADVINCULA

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Summary :

Organic light emitting diodes (OLEDs) containing nanostructured cathode buffer layers were fabricated, and their electrical and emitting properties were investigated. The OLEDs have an ITO anode/CuPc/TPD/Alq3/buffer layer/Al cathode structure with the buffer layers made from nanostructured alternating layers Alq3 and Al. The driving voltage and the efficiency of the devices were improved by insertion of the buffer layer. It was estimated that some modulations of the Schottky barrier at the Alq3 and the Al cathode interface were induced due to the insertion of the buffer layer and it caused an enhancement of electron injection from the Al cathode.

Publication
IEICE TRANSACTIONS on Electronics Vol.E85-C No.6 pp.1233-1238
Publication Date
2002/06/01
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Issue on Recent Progress in Organic Molecular Electronics)
Category
Electronic Devices

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