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Efficient Yellow Electroluminescence from a Single Layer of a Cyclometalated Iridium Complex

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Contribution from the Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, and Department of Chemistry, Princeton University, Princeton, New Jersey 08544
Cite this: J. Am. Chem. Soc. 2004, 126, 9, 2763–2767
Publication Date (Web):February 17, 2004
https://doi.org/10.1021/ja0345221
Copyright © 2004 American Chemical Society

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    Abstract

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    We report on the spectroscopic, electrochemical, and electroluminescent properties of [Ir(ppy)2(dtb-bpy)]+(PF6)- (ppy:  2-phenylpyridine, dtb-bpy:  4,4‘-di-tert-butyl-2,2‘-dipyridyl). Single-layer devices were fabricated and found to emit yellow light with a brightness that exceeds 300 cd/m2 and a luminous power efficiency that exceeds 10 Lm/W at just 3 V. The PF6- space charge was found to dominate the device characteristics.

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