Contact printing of colloidal nanocrystal thin films for hybrid organic/quantum dot optoelectronic devices

Publication Type:

Journal Article

Source:

Nano Rev., nano-reviews.net, Volume 3 (2012)

ISBN:

2000-5121

Keywords:

2012, 2013 and earlier, deposition, LED, monolayer, organic semiconductor, QD, stamp

Abstract:

Novel thin film optoelectronic devices containing both inorganic colloidal semiconductor quantum dots (QDs) and organic semiconductor thin films have
been widely investigated in recent years for a variety of applications.
Here, we review one of the most versatile and successful methods developed
to integrate these two dissimilar material classes into a functional
multilayered device: contact printing of colloidal QD films. Experimental
details regarding the contact printing process are outlined, and the key
advantages of this QD deposition method over other commonly encountered
techniques are discussed. The use of tapping mode atomic force microscopy
(AFM) to effectively characterize QD film morphology both on an
elastomeric stamp (before contact printing) and as-transferred to the
organic semiconductor receiving film (after contact printing) is also
described. Finally, we offer suggestions for future efforts directed
toward the goal of rapid, continuous QD deposition over larger substrates
for the advancement of hybrid optoelectronic thin film devices.