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    Electrical control of photoluminescence wavelength from semiconductor quantum dots in a ferroelectric polymer matrix

    Year: 2011

    Journal: Appl. Phys. Lett., 2011, 99, 153112 (3pp), 20131009

    Authors: Rafał Korlacki, Ravi F. Saraf, Stephen Ducharme

    Organizations: Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0299, USA; Department of Chemical and Biomolecular Engineering and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0643, USA

    We report controllable tuning of the room temperature photoluminescence band of CdSe semiconductor quantum dots embedded in thin films of ferroelectric copolymer of vinylidene fluoride and trifluoroethylene made by Langmuir-Blodgett deposition. The high breakdown strength of the polymer permits the application of electric fields of up to 400 MV/m and results in a shift in the photoluminescence peak by up to 9 nm, nearly half the fluorescence band width. Moreover, we found that at these high electric fields, the Stark effect exhibits unusual fourth power dependence.