| Autor: |
Korthout, K., Smet, P. F., Poelman, D. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 6/27/2011, Vol. 98 Issue 26, p261919, 3p, 4 Graphs |
| Abstrakt: |
Light-emitting diodes (LEDs) are efficient, energy-saving light sources. Unfortunately, designing phosphors for LEDs that emit warm white light is not straightforward. We solvothermally prepared rare earth doped alkaline earth sulfides with a core-shell structure in order to obtain a physical separation between different dopants (europium and cerium). Cathodoluminescence of a single phosphor particle in an electron microscope proves simultaneous Eu2+ and Ce3+ broad band emission. The emission color can be tuned by variation of the composition, core size, and shell thickness. Upon excitation of SrS:Eu2+-SrS:Ce3+ core-shell structures at 430 nm, white light emission with good color rendering and a color temperature around 3000 K is obtained. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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