'Institute of Electrical and Electronics Engineers (IEEE)'
Doi
Abstract
This paper reports the utilization of colloidal semiconductor
quantum dots as color converters for Gb/s visible light
communications. We briefly review the design and properties of
colloidal quantum dots and discuss them in the context of fast
color conversion of InGaN light sources, in particular in view of
the effects of self-absorption. This is followed by a description of
a CQD/polymer composite format of color converters. We show
samples of such color-converting composite emitting at green, yellow/orange
and red wavelengths, and combine these with a blueemitting
microsize LED to form hybrid sources for wireless visible
light communication links. In this way data rates up to 1 Gb/s over
distances of a few tens of centimeters have been demonstrated. Finally,
we broaden the discussion by considering the possibility for
wavelength division multiplexing as well as the use of alternative
colloidal semiconductor nanocrystals