Bifunctional star-burst amorphous molecular materials for OLEDs: achieving highly efficient solid-state luminescence and carrier transport induced by spontaneous molecular orientation

Jun Yun Kim; Takuma Yasuda; Yu Seok Yang; Chihaya Adachi

doi:10.1002/adma.201204902

Bifunctional star-burst amorphous molecular materials for OLEDs: achieving highly efficient solid-state luminescence and carrier transport induced by spontaneous molecular orientation

Adv Mater. 2013 May 21;25(19):2666-71. doi: 10.1002/adma.201204902. Epub 2013 Feb 12.

Authors

Jun Yun Kim¹, Takuma Yasuda, Yu Seok Yang, Chihaya Adachi

Affiliation

¹ Department of Applied Chemistry and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.

PMID: 23401305
DOI: 10.1002/adma.201204902

Abstract

Bifunctional star-burst amorphous molecular materials displaying both efficient solid-state luminescence and high hole-transport properties are developed in this study. A high external electroluminescence quantum efficiency up to 5.9% is attained in OLEDs employing the developed amorphous materials. It is revealed that the spontaneous horizontal orientation of these light-emitting molecules in their molecular-condensed states leads to a remarkable enhancement of the electroluminescence efficiencies and carrier-transport properties.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Electron Transport
Energy Transfer
Equipment Design
Equipment Failure Analysis
Lighting / instrumentation*
Luminescent Measurements / instrumentation*
Materials Testing
Organic Chemicals / chemistry*
Semiconductors*

Substances

Organic Chemicals