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Proceedings Paper

Interface and material considerations of OLEDs
Author(s): Yoshiharu Sato; Tomoyuki Ogata; Shouko Ichinosawa; Masayo Fugono; Hiroyuki Kanai
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Paper Abstract

Three interfaces, anode interface, hole blocking layer and cathode interface were considered mainly from the viewpoint of materials. Vinyl polymers containing triphenylamine as a side group were investigated as an ITO buffer layer. When these polymers were doped with strong acceptor, they lowered operation voltage of OLED and also improved the thermal stability. Employment of high Tg hole transport material was also found effective for the thermally stable EL characteristics. Hole blocking material with a wider optical gap improved color purity of blue-emitting device. Various inorganic compounds were examined as a cathode interface layer to demonstrate that MgF2 was effective to improve operation lifetime of OLED.

Paper Details

Date Published: 17 December 1999
PDF: 11 pages
Proc. SPIE 3797, Organic Light-Emitting Materials and Devices III, (17 December 1999); doi: 10.1117/12.372710
Show Author Affiliations
Yoshiharu Sato, Mitsubishi Chemical Corp. (Japan)
Tomoyuki Ogata, Mitsubishi Chemical Corp. (Japan)
Shouko Ichinosawa, Mitsubishi Chemical Corp. (Japan)
Masayo Fugono, Mitsubishi Chemical Corp. (Japan)
Hiroyuki Kanai, Mitsubishi Chemical Corp. (Japan)

Published in SPIE Proceedings Vol. 3797:
Organic Light-Emitting Materials and Devices III
Zakya H. Kafafi, Editor(s)

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