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Simple Structure and High Efficiency Phosphorescent OLEDs Using Narrow Band-gap Bipolar Host Material

Published online by Cambridge University Press:  25 May 2012

Young Hoon Son  and
Jang Hyuk Kwon
Young Hoon Son
Affiliation:
Dept. of Inform. Display, Kyung Hee Univerisity, Dongdaemoon-ku, Seoul 130-701, Korea.
Jang Hyuk Kwon*
Affiliation:
Dept. of Inform. Display, Kyung Hee Univerisity, Dongdaemoon-ku, Seoul 130-701, Korea.
*
*Email: [email protected]
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Abstract

We report high-efficiency phosphorescent blue OLEDs with an organic three stacked structure. Using a high-triplet-energy-hole transporting material of TAPC and a high-triplet-energy-electron transporting material of TmPyPB, the organic three stacked structure has been realized with three new narrow band-gap blue host materials. These host materials have bipolar characteristics and high triplet energy of >2.8 eV. Very low onset voltages of 2.8~3.0 V and driving voltages of 4.2~4.6 V to obtain a brightness of 1000 cd/m2 are achieved in this three stacked device configuration. Maximum external quantum efficiency above 20% is reported.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1435: Symposium J – Organic and Hybrid-Organic Electronics , 2012 , mrss12-1435-j14-06
Copyright
Copyright © Materials Research Society 2012

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References

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