Tunable light emission using quantum dot-coated upconverters

TL Nguyen, P Spizzirri, G Wilson… - Chemical …, 2008 - pubs.rsc.org
TL Nguyen, P Spizzirri, G Wilson, P Mulvaney
Chemical communications, 2008pubs.rsc.org
… In principle, the combination of strong upconverter absorption with tunable down-conversion
from semiconducting QDs provides a method for creating tunable upconverters. We report
here on a simple method for encapsulating NIR upconverters, such that they can emit at any
tunable visible wavelength with a high emission quantum efficiency. When conventional NIR
upconverters are coated with multilayers of QDs, the upconverted emission is absorbed by the
QD coating (ieradiative energy transfer ), which then re-emits at its design (visible) wavelength …
Near infrared (NIR) upconverters only emit at a single visible wavelength; coating them with quantum dot multilayers allows the emission wavelength to be tuned across the visible spectrum.
The Royal Society of Chemistry
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