Light emitting devices (LEDs) based on colloidal semiconductor nanocrystals represent a matter of technological interest
for the development of flat panel display and lighting systems. The appealing features of these materials are the high
fluorescence efficiency, narrow ban edge emission, potential chemical stability, and tunable light emission across the
visible spectrum. These characteristics open the way to a new class of hybrid devices in which the flexible technology of
organic LEDs can be combined with the long operating lifetime of inorganic semiconductor devices.
In particular over the last few years several hybrid device structures based on colloidal semiconductor quantum dots
(QDs) and organic material have been reported. In this paper we report on recent development in the fabrication of QDLEDs
and in particular in white hybrid LEDs.