Near-IR photoresponse in new up-converting CdSe/NaYF4:Yb,Er nanoheterostructures.
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.
Department of Chemistry and Center for Self-Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montréal, QC, Canada H3A 2K6.
Chenglin
C
Yan
Afshin
A
Dadvand
Federico
F
Rosei
Dmitrii F
DF
Perepichka