Photoluminescence and energy transfer in Tb3+/Mn2+ co-doped ZnAl2O4 glass ceramics

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Details zur Publikation

Autor(en): Lakshminarayana G, Wondraczek L
Zeitschrift: Journal of Solid State Chemistry
Jahr der Veröffentlichung: 2011
Band: 184
Heftnummer: 8
Seitenbereich: 1931-1938
ISSN: 0022-4596


Abstract

We report on Tb3+ as efficient sensitizer for red photoemission from Mn2+-centers in ZnO--B2O3--Al2O3--Si2O--Na2O--SrO glasses and corresponding gahnite glass ceramics. In comparison to singly or co-doped glasses, the glass ceramics exhibit significantly increased emission intensity. Structural considerations, ESR, and dynamic luminescence spectroscopy indicate partial incorporation of Mn2+ as well as Tb3+ into the crystalline phase, the former on octahedral Zn2+-sites. Interionic distance and charge transfer probability between both species depend on crystallization conditions. This enables control of the energy transfer process and, hence, tunability of the color of photoemission by simultaneous emission from Tb3+ and Mn2+ centers. Concentration quenching in Mn2+-singly doped materials was found at a critical dopant concentration of about 1.0 mol%. The energy transfer process was studied in detail by dynamic as well as static luminescence spectroscopy. Spectroscopic results suggest the application of the studied materials as single or dual-mode emitting phosphor for luminescent lighting.


FAU-Autoren / FAU-Herausgeber

Wondraczek, Lothar Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Glas und Keramik)


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Lakshminarayana, G., & Wondraczek, L. (2011). Photoluminescence and energy transfer in Tb3+/Mn2+ co-doped ZnAl2O4 glass ceramics. Journal of Solid State Chemistry, 184(8), 1931-1938. https://dx.doi.org/10.1016/j.jssc.2011.05.059

MLA:
Lakshminarayana, Gandham, and Lothar Wondraczek. "Photoluminescence and energy transfer in Tb3+/Mn2+ co-doped ZnAl2O4 glass ceramics." Journal of Solid State Chemistry 184.8 (2011): 1931-1938.

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Zuletzt aktualisiert 2019-14-03 um 09:53