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Special Section on Organic Light-Emitting Materials and Devices

Highly efficient white organic light-emitting device using a single emitter

[+] Author Affiliations
Nathan Bakken, Zixing Wang, Jian Li

Arizona State University, Materials Engineering, Tempe, Arizona 85287

J. Photon. Energy. 2(1), 021203 (Mar 02, 2012). doi:10.1117/1.JPE.2.021203
History: Received September 30, 2011; Revised December 10, 2011; Accepted December 13, 2011
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Abstract.  White organic light-emitting devices (WOLEDs) can be fabricated using a simple, low-cost device structure with a single uniformly doped emissive layer. The Pt-17 emitter used in these devices obtains excellent color rendering (CRI=80) as well as bright white electrophosphoresence (CIE x=0.37, y=0.40) by combining efficient monomer and efficient excimer emission as demonstrated by excellent external quantum efficiency (ηext=15.9%). The Pt-17 based WOLED is also compatible with state-of-the-art charge injection and blocking materials as well as high out-coupling device structures. Application of these existing technologies is expected to extend luminance efficiencies of Pt-17 devices to world-class values (46lm/W and 100lm/W respectively). In addition to avoiding the difficulty and cost of fabricating more complex device structures, the color of a single-doped device also is uniquely independent of voltage, current density, and age. Molecules like fluorine-free Pt-17 are uniquely positioned to utilize excimer emissions in order to reduce manufacturing costs and provide solutions to satisfy many of the requirements for the next generation of organic solid-state lighting.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Nathan Bakken ; Zixing Wang and Jian Li
"Highly efficient white organic light-emitting device using a single emitter", J. Photon. Energy. 2(1), 021203 (Mar 02, 2012). ; http://dx.doi.org/10.1117/1.JPE.2.021203


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