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Wide-Range Color Tuning of Iridium Biscarbene Complexes from Blue to Red by Different NN Ligands: an Alternative Route for Adjusting the Emission Colors

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Four new iridium biscarbene complexes with different N⁁N ligands showing very different emission colors from deep-blue to red are synthesized. The emission colors are mainly controlled by the N⁁N ligands. The electroluminescent devices using these complexes as dopant emitters exhibit extremely high efficiencies.

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