Electroluminescence in novel hole-transporting emissive materials

Shizuo Tokito; Koji Noda; Hisayoshi Fujikawa; Makoto Kimura; Kou Shimada; Yasuhiko Sawaki; Yasunori Taga

doi:10.1117/12.416910

2 February 2001 Electroluminescence in novel hole-transporting emissive materials

Shizuo Tokito, Koji Noda, Hisayoshi Fujikawa, Makoto Kimura, Kou Shimada, Yasuhiko Sawaki, Yasunori Taga

Proceedings Volume 4105, Organic Light-Emitting Materials and Devices IV; (2001) https://doi.org/10.1117/12.416910
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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.

Citation Download Citation

Shizuo Tokito, Koji Noda, Hisayoshi Fujikawa, Makoto Kimura, Kou Shimada, Yasuhiko Sawaki, and Yasunori Taga "Electroluminescence in novel hole-transporting emissive materials", Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); https://doi.org/10.1117/12.416910

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