Photonic Systems Brown Bag Seminar Series

Thursday, February 10, 2005, at 12 noon                        RLE Haus room 36-428

Quantum Dot Light Emitting Devices for Display Applications

Seth Coe-Sullivan

Creation of patterned, efficient, and saturated color hybrid
organic/inorganic quantum dot light emitting devices (QD-LEDs) for
displays is dependent on the development of integrated fabrication and
patterning methods for the QD layer.  We show that contact printing
techniques can be applied to QD deposition, generating micron-scale
pattern definition, needed in pixilated-display applications.  QD-LEDs
with external quantum efficiencies in excess of 1% are demonstrated. 
Combining this technique with the use of wide optical band gap host
materials, and a new synthetic route for the creation of blue emitting
(CdS)ZnS nanocrystals, it is now possible to fabricate QD-LEDs with
saturated color emission in the red, green and blue regions of the
spectrum.  This work will detail the QD-LED device structures and
operating properties, and describe the above hybrid material fabrication
technique.