2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Patterned Deposition of Solution-Processed Colloidal Nanocrystal Quantum Dots for LEDs Aplications

J. Xu, J. Ruzyllob, T. Zhu, K. Shanmugasundaram, F. Zhang, S.C. Price, S.E. Mohney, Q. Zhang, A.Y. Wang
Penn State University, US

colloidal quantum dots, mist deposition, device fabrication, light emitting diodes

We report a mist-deposition process for the assembly and patterning of nanocrystal quantum dots (NQDs) during the fabrication of quantum dot light emitting diodes (QD-LEDs), which allows for tight controls over the thickness, surface morphology, composition and resolution of NQD emissive layers. A defect-free featuring uniform brightness QD-LED containing a mist-deposited emissive CdSe(ZnS) NQD-layer was demonstrated. Additionally, the technique of successive mist-deposition of multi-color NQDs through a set of registered shallow masks was employed to create a 66 matrix of alternating pixels composed of 5nm-diameter CdSe(ZnS) NQDs (green) and 8nm-diameter CdSe(ZnS) NQDs (red) on the same substrate. The results obtained demonstrate the potential of mist-deposition technology in the future development of full-color QD-LED displays.

Nanotech 2008 Conference Program Abstract