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Rainbow Emission from an Atomic Transition in Doped Quantum Dots

Hazarika, Abhijit and Pandey, Anshu and Sarma, DD (2014) Rainbow Emission from an Atomic Transition in Doped Quantum Dots. In: JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 5 (13). pp. 2208-2213.

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Official URL: http://dx.doi.org/ 10.1021/jz500937x


Although semiconductor quantum dots are promising materials for displays and lighting due to their tunable emissions, these materials also suffer from the serious disadvantage of self-absorption of emitted light. The reabsorption of emitted light is a serious loss mechanism in practical situations because most phosphors exhibit subunity quantum yields. Manganese-based phosphors that also exhibit high stability and quantum efficiency do not suffer from this problem but in turn lack emission tunability, seriously affecting their practical utility. Here, we present a class of manganese-doped quantum dot materials, where strain is used to tune the wavelength of the dopant emission, extending the otherwise limited emission tunability over the yellow-orange range for manganese ions to almost the entire visible spectrum covering all colors from blue to red. These new materials thus combine the advantages of both quantum dots and conventional doped phosphors, thereby opening new possibilities for a wide range of applications in the future.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 26 Aug 2014 06:31
Last Modified: 26 Aug 2014 06:31
URI: http://eprints.iisc.ac.in/id/eprint/49667

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