Broadband UV-to-green photoconversion in V-doped lithium zinc silicate glasses and glass ceramics

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Gao G, Meszaros R, Peng M, Wondraczek L
Zeitschrift: Optics Express
Jahr der Veröffentlichung: 2011
Band: 19
Heftnummer: S3
ISSN: 1094-4087


Abstract

We report on photoluminescence of vanadium-doped lithium zinc silicate glasses and corresponding nanocrystalline Li$_2$ZnSiO$_4$ glass ceramics as broadband UV-to-VIS photoconverters. Depending on dopant concentration and synthesis conditions, VIS photoemission from [VO4]3- is centered at 550-590 nm and occurs over a bandwidth (FWHM) of ~250 nm. The corresponding excitation band covers the complete UV-B to UV-A spectral region. In as-melted glasses, the emission lifetime is about 34 \textgreekms up to a nominal dopant concentration of 0.5 mol%. In the glass ceramic, it increases to about 45 \textgreekms. For higher dopant concentration, a sharp drop in emission lifetime was observed, what is interpreted as a result of concentration quenching. Self-quenching is further promoted by energy transfer to V4+ centers ($^2$Гt4$i̊ghtarrow$$^2$Гt3). Partitioning of vanadium into V5+ and V4+ was examined by electron paramagnetic resonance and X-ray photoelectron spectroscopy. Suppression of V5+-reduction requires careful adjustment of the optical basicity of the host glass and/or synthesis conditions.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Gao, Guojun
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Meszaros, Robert
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Wondraczek, Lothar Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Glas und Keramik)


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


Forschungsbereiche

C Photonic and Optical Materials
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Gao, G., Meszaros, R., Peng, M., & Wondraczek, L. (2011). Broadband UV-to-green photoconversion in V-doped lithium zinc silicate glasses and glass ceramics. Optics Express, 19(S3). https://dx.doi.org/10.1364/OE.19.00A312

MLA:
Gao, Guojun, et al. "Broadband UV-to-green photoconversion in V-doped lithium zinc silicate glasses and glass ceramics." Optics Express 19.S3 (2011).

BibTeX: 

Zuletzt aktualisiert 2019-15-03 um 03:08