Contact Printing of Quantum Dot Light-Emitting Devices

TitleContact Printing of Quantum Dot Light-Emitting Devices
Publication TypeJournal Article
Year of Publication2008
AuthorsKim, LA, Anikeeva, PO, Coe-Sullivan, SA, Steckel, JS, Bawendi, MG, Bulovic, V
JournalNano Letters
Volume8
Issue12
Pagination4513 - 4517
Date Published2008/12//
Abstract

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 (OD-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 OD-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,mu m critical dimension, corresponding to 1000 ppi (pixels-per-inch) print resolution.