Special Section on Organic Light-Emitting Materials and Devices

Controlling charge transport in blue organic light-emitting devices by chemical functionalization of host materials

[+] Author Affiliations
Evgueni Polikarpov, Phillip K. Koech, Liang Wang, James S. Swensen, Lelia Cosimbescu, James E. Rainbolt, Amber L. Von Ruden, Daniel J. Gaspar, Asanga B. Padmaperuma

Pacific Northwest National Laboratory, Energy and Environment Directorate, Richland, Washington 99352

J. Photon. Energy. 1(1), 011007 (January 18, 2011). doi:10.1117/1.3528499
History: Received August 31, 2010; Revised November 19, 2010; Accepted November 29, 2010; Published January 18, 2011
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We report the photophysical characterization, computational results, and device properties for ambipolar phosphine oxide–based host materials that were chemically functionalized to control the charge transport. We study the effects of structural modifications of phosphine oxide hosts on the charge balance in the emissive zone of organic light-emitting devices (OLEDs). Significant changes in charge transport within the emissive layer are observed upon introduction of functional groups, such as pyridine and carbazole, into the organic phosphine oxide host structure. We demonstrate that rational design of host materials allows for the control of charge balance in the emissive zone of OLEDs.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Evgueni Polikarpov ; Phillip K. Koech ; Liang Wang ; James S. Swensen ; Lelia Cosimbescu, et al.
"Controlling charge transport in blue organic light-emitting devices by chemical functionalization of host materials", J. Photon. Energy. 1(1), 011007 (January 18, 2011). ; http://dx.doi.org/10.1117/1.3528499


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