A Codeposition Route to CuI−Pyridine Coordination Complexes for Organic Light-Emitting Diodes
- 2 March 2011
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 133 (11), 3700-3703
- https://doi.org/10.1021/ja1065653
Abstract
We demonstrate a new approach for utilizing CuI coordination complexes as emissive layers in organic light-emitting diodes that involves in situ codeposition of CuI and 3,5-bis(carbazol-9-yl)pyridine (mCPy). With a simple three-layer device structure, pure green electroluminescence at 530 nm from a Cu(I) complex was observed. A maximum luminance and external quantum efficiency (EQE) of 9700 cd/m2 and 4.4%, respectively, were achieved. The luminescent species was identified as [CuI(mCPy)2]2 on the basis of photophysical studies of model complexes and X-ray absorption spectroscopy.Keywords
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