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Published on: February 11, 2016
Near-IR photoresponse in new up-converting CdSe/NaYF4:Yb,Er nanoheterostructures
Chenglin Yan1, Afshin Dadvand, Federico Rosei
1Department of Chemistry and Center for Self-Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montréal, QC, Canada H3A 2K6.
Abstract:
We report the synthesis of new nanoheterostructures consisting of lanthanide-doped NaYF(4) nanocrystals dendritically decorated with CdSe quantum dots. Strong coupling between NaYF(4):Yb,Er and CdSe leads to up-conversion of near-IR photons and subsequent energy transfer from lanthanide nanocrystals to CdSe. This is manifested in characteristic CdSe emission and leads to pronounced photoconductivity of the films upon sub-band-gap irradiation at 980 nm.
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