title: Colloidal nanocrystals embedded in macrocrystals: robustness, photostability, and color purity.
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.
authors.affiliation: Physical Chemistry/Electrochemistry, Technische Universität Dresden, Bergstr. 66b, 01062 Dresden, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Otto
authors.forename: Marcus
authors.initials: M
authors.lastname: Müller
authors.forename: Paul
authors.initials: P
authors.lastname: Mundra
authors.forename: Vladimir
authors.initials: V
authors.lastname: Lesnyak
authors.forename: Hilmi Volkan
authors.initials: HV
authors.lastname: Demir
authors.forename: Nikolai
authors.initials: N
authors.lastname: Gaponik
authors.forename: Alexander
authors.initials: A
authors.lastname: Eychmüller