title: Contact printing of quantum dot light-emitting devices.
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 (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.
authors.affiliation: Laboratory of Organic Optics and Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge Massachusetts 02139, USA.
authors.forename: LeeAnn
authors.initials: L
authors.lastname: Kim
authors.forename: Polina O
authors.initials: PO
authors.lastname: Anikeeva
authors.forename: Seth A
authors.initials: SA
authors.lastname: Coe-Sullivan
authors.forename: Jonathan S
authors.initials: JS
authors.lastname: Steckel
authors.forename: Moungi G
authors.initials: MG
authors.lastname: Bawendi
authors.forename: Vladimir
authors.initials: V
authors.lastname: Bulović