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Proceedings Paper

Electroluminescence in novel hole-transporting emissive materials
Author(s): Shizuo Tokito; Koji Noda; Hisayoshi Fujikawa; Makoto Kimura; Kou Shimada; Yasuhiko Sawaki; Yasunori Taga
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Paper Abstract

We have fabricated highly efficient organic light-emitting diodes (OLEDs) using novel hole-transporting emissive materials with triphenylamine moiety. The novel emissive materials have a high glass transition temperature ranging from 141 - 152 degrees Celsius, which is attributed to nonplanar molecular structure. The OLEDs consist of an emitting layer of the novel emissive material and an electron-transport layer of tris(8-qunolinolato) aluminum (Alq3). Emission colors of the OLEDs were bluish-green and greenish-yellow. High external quantum efficiency of 1.2 - 2% was obtained at a luminance of 300 cd/m2, and good durability in a continuous operation at room temperature and high temperatures was achieved.

Paper Details

Date Published: 2 February 2001
PDF: 6 pages
Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); doi: 10.1117/12.416910
Show Author Affiliations
Shizuo Tokito, Toyota Central Research & Development Labs., Inc. (Japan)
Koji Noda, Toyota Central Research & Development Labs., Inc. (Japan)
Hisayoshi Fujikawa, Toyota Central Research & Development Labs., Inc. (Japan)
Makoto Kimura, Nagoya Univ. (Japan)
Kou Shimada, Nagoya Univ. (Japan)
Yasuhiko Sawaki, Nagoya Univ. (Japan)
Yasunori Taga, Toyota Central Research & Development Labs., Inc. (Japan)


Published in SPIE Proceedings Vol. 4105:
Organic Light-Emitting Materials and Devices IV
Zakya H. Kafafi, Editor(s)

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