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Bifunctional Star‐Burst Amorphous Molecular Materials for OLEDs: Achieving Highly Efficient Solid‐State Luminescence and Carrier Transport Induced by Spontaneous Molecular Orientation

descriptionPublicationkeyboard_double_arrow_right Article , Journal 12 Feb 2013Publisher:WileyJournal:Advanced Materials, volume 25, pages 2,666-2,671 (issn: 0935-9648, eissn: 1521-4095,

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

doi: 10.1002/adma.201204902

pmid: 23401305

Bifunctional Star‐Burst Amorphous Molecular Materials for OLEDs: Achieving Highly Efficient Solid‐State Luminescence and Carrier Transport Induced by Spontaneous Molecular Orientation

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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.

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Keywords

Equipment Design, Electron Transport, Equipment Failure Analysis, Energy Transfer, Semiconductors, Luminescent Measurements, Materials Testing, Organic Chemicals, Lighting

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