Bipolar silole molecular glasses for high-performance organic single-layer light-emitting diodes

ORGN 614

Xiaowei Zhan, xiaowei.zhan@chemistry.gatech.edu1, Andreas Haldi2, Sarah Montgomery2, Evans Thompson2, Chad Risko1, Zesheng An1, Benoit Domercq, domercq@ece.gatech.edu3, Stephen Barlow, stephen.barlow@chemistry.gatech.edu1, Bernard Kippelen, kippelen@ece.gatech.edu3, Jean-Luc Brédas1, and Seth R. Marder1. (1) School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 770 State Street, Atlanta, GA 30332-0400, (2) School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, (3) School of Electrical and Computer Engineering and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA 30332-0250
Silacyclopentadienes (siloles) have emerged as a new class of organic optoelectronic materials with intense solid-state fluorescence and good electron-transport properties in organic light-emitting diodes (OLEDs). Siloles have relatively low-lying lowest unoccupied molecular orbital levels due to their s*-p* conjugation, resulting in relatively high electron affinities. As a result, siloles have been utilized as electron-transport layers in devices and have shown high electron mobilities. However, there have been few papers reporting their bipolar charge-transport properties, although bipolar transport materials would be ideal for many applications. Furthermore, no high-performance single-layer OLEDs were fabricated using siloles as emissive layers although single-layer devices are simple and desirable. In this study, we report new silole derivatives with high glass-transition temperatures and bipolar carrier-transport properties, and their applications in single-layer high-performance OLEDs.
 

Materials, Devices, and Switches
8:00 AM-12:00 PM, Thursday, 30 March 2006 Georgia World Congress Center -- Georgia Ballroom 2, Oral

Division of Organic Chemistry

The 231st ACS National Meeting, Atlanta, GA, March 26-30, 2006