Mist fabrication of light emitting diodes with colloidal nanocrystal quantum dots

T. Zhu, K. Shanmugasundaram, S. C. Price, J. Ruzyllo, F. Zhang, J. Xu, S. E. Mohney, Q. Zhang, A. Y. Wang

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Abstract

In this letter, 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 multicolor NQDs through a set of registered shallow masks was employed to create a 6×6 matrix of alternating pixels composed of 5 nm diameter CdSe(ZnS) NQDs (green) and 8 nm 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.

Original languageEnglish (US)
Article number023111
JournalApplied Physics Letters
Volume92
Issue number2
DOIs
StatePublished - Jan 28 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Zhu, T., Shanmugasundaram, K., Price, S. C., Ruzyllo, J., Zhang, F., Xu, J., Mohney, S. E., Zhang, Q., & Wang, A. Y. (2008). Mist fabrication of light emitting diodes with colloidal nanocrystal quantum dots. Applied Physics Letters, 92(2), [023111]. https://doi.org/10.1063/1.2834734