Broadband NIR photoluminescence from Ni2+-doped nanocrystalline Ba-Al titanate glass ceramics

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Gao G, Reibstein S, Spiecker E, Peng M, Wondraczek L
Zeitschrift: Journal of Materials Chemistry
Verlag: Royal Society of Chemistry
Jahr der Veröffentlichung: 2012
Band: 22
Heftnummer: 6
Seitenbereich: 2582-2588
ISSN: 0959-9428


Abstract


Nanocrystalline Ba-Al titanate precipitates from supercooled TiO2-BaO-SiO2-Al2O3 melts by catalyzed volume nucleation in the presence of Ni2+, forming a BaAl2Ti6O16 hollandite-type lattice. Ni2+-species are incorporated into the crystalline environment in octahedral coordination. Hollandite formation is accompanied by precipitation of tetrahedrally distorted BaTiO3 as a secondary crystal phase, where crystal species and habitus can be clearly distinguished by dark-field transmission electron microscopy. Resulting photoluminescence due to spin-allowed relaxation of T-3(2g)(F-3) to (3)A(2g)(F-3) in VI Ni2+ occurs from three distinct emission centers. It spans the spectral range of 1.0 to 1.6 mu m and exhibits a lifetime of about 60 mu s, which suggests applications in tunable lasers and broadband optical amplifiers. Besides red and IR laser excitation, NIR photoemission can be excited with conventional near UV light sources, i.e. in the spectral range of 350-420 nm. Decay kinetics as well as position and shape of the emission band can be adjusted by dopant concentration and synthesis conditions.



FAU-Autoren / FAU-Herausgeber

Gao, Guojun
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Wondraczek, Lothar Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Glas und Keramik)


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


Autor(en) der externen Einrichtung(en)
South China University of Technology (SCUT) / 华南理工大学


Zitierweisen

APA:
Gao, G., Reibstein, S., Spiecker, E., Peng, M., & Wondraczek, L. (2012). Broadband NIR photoluminescence from Ni2+-doped nanocrystalline Ba-Al titanate glass ceramics. Journal of Materials Chemistry, 22(6), 2582-2588. https://dx.doi.org/10.1039/c1jm14292e

MLA:
Gao, Guojun, et al. "Broadband NIR photoluminescence from Ni2+-doped nanocrystalline Ba-Al titanate glass ceramics." Journal of Materials Chemistry 22.6 (2012): 2582-2588.

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Zuletzt aktualisiert 2018-01-09 um 07:11