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Sergio Brovelli, Giuseppe Sforazzini, Michele Serri, Gustaf Winroth, Kosuke Suzuki, Francesco Meinardi, Harry L. Anderson and Franco Cacialli Emission Color Trajectory and White Electroluminescence Through Supramolecular Control of Energy Transfer and Exciplex Formation in Binary Blends of Conjugated Polyrotaxanes Advanced Functional Materials 22

Article first published online: 14 JUN 2012 | DOI: 10.1002/adfm.201200786

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Blends of a blue-emitting polymer and a green/yellow-emitting threaded molecular wire emit white luminescence due to control of the minimum intermolecular distance at the nanoscale, which results in suppressed energy transfer between the blend constituents and reduced formation of interchain charge-transfer complexes. Light-emitting diodes incorporating only 20% by weight of the encapsulated material display white electroluminescence with a turn-on voltage of just 3 V.

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