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

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3 Author(s)
Korlacki, Rafał ; Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0299, USA ; Saraf, Ravi F. ; Ducharme, Stephen

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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.

Published in:

Applied Physics Letters  (Volume:99 ,  Issue: 15 )