Contact printing of quantum dot light-emitting devices

Publication Type:

Journal Article


Nano Lett., ACS Publications, Volume 8, Issue 12, p.4513-4517 (2008)




2008, 2013 and earlier


We demonstrate a solvent-free contact printing process for deposition of patterned and unpatterned colloidal quantum dot (QD) thin films as the
electroluminescent layers within hybrid organic-QD light-emitting devices
(QD-LEDs). Our method benefits from the simplicity, low cost, and high
throughput of solution-processing methods, while eliminating exposure of
device structures to solvents. Because the charge transport layers in
hybrid organic/inorganic QD-LEDs consist of solvent-sensitive organic thin
films, the ability to avoid solvent exposure during device growth, as
presented in this study, provides a new flexibility in choosing organic
materials for improved device performance. In addition, our method allows
us to fabricate both monochrome and red-green-blue patterned
electroluminescent structures with 25 microm critical dimension,
corresponding to 1000 ppi (pixels-per-inch) print resolution.


PMID: 19053797