Colloidal Nanocrystals Embedded in Macrocrystals: Robustness, Photostability, and Color Purity

Date

2012-09-14

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Source Title

Nano Letters

Print ISSN

1530-6984

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Publisher

American Chemical Society

Volume

12

Issue

10

Pages

5348 - 5354

Language

English

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Abstract

The incorporation of colloidal quantum dots (QDs) into ionic crystals of various salts (NaCl, KCl, KBr, etc.) is demonstrated. The resulting mixed crystals of various shapes and beautiful colors preserve the strong luminescence of the incorporated QDs. Moreover, the ionic salts appear to be very tight matrices, ensuring the protection of the QDs from the environment and as a result providing them with extraordinary high photo- and chemical stability. A prototype of a white light-emitting diode (WLED) with a color conversion layer consisting of this kind of mixed crystals is demonstrated. These materials may also find applications in nonlinear optics and as luminescence standards.

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