White-light emission from a blend of CdSeS nanocrystals of different Se:S ratio
- 12 January 2007
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 18 (7) , 075401
- https://doi.org/10.1088/0957-4484/18/7/075401
Abstract
CdSeS nanocrystals with different bandgap energies have been synthesized by the colloidal method. The solution blend of blue-, green- and red-emitting CdSeS nanocrystals, in appropriate proportions, showed strong white emission of different shades on excitation with a UV source. We observed that the CIE coordinate of the spectrum of a particular blend is independent of excitation wavelength. We also observed that the contribution of self-absorption in energy loss in the blend of CdSeS nanocrystals is not very significant. A white-light-emitting LED has been fabricated by coating a blend mixed with polymethylmethacrylate on a commercial UV-LED.Keywords
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