Photon conversion in Tb,Yb:CaxSr1-xAl2O4 nanocrystals

Photon conversion in Tb,Yb:CaxSr1-xAl2O4 nanocrystals

In this work the fabrication and the photoluminescence properties of CaxSr1-xAl2O4 nanocrystals doped with Ca, Tb and Yb are investigated. The photoluminescence quantum yield measured at 980 nm of the Yb doped CaxSr1-xAl2O4 nanocrystals is found to be 8% for an excitation in the ultraviolet range. H...

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Veröffentlicht in:Journal of luminescence 2018-10, Vol.202, p.377-380
Hauptverfasser: Fix, T., Rinnert, H., Rehspringer, J.-L., Slaoui, A.
Format: Artikel
Sprache:eng
Schlagworte:
Chemical and Process Engineering
Downconversion
Engineering Sciences
Materials
Photon conversion
Photovoltaics
Rare earth
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Zusammenfassung:In this work the fabrication and the photoluminescence properties of CaxSr1-xAl2O4 nanocrystals doped with Ca, Tb and Yb are investigated. The photoluminescence quantum yield measured at 980 nm of the Yb doped CaxSr1-xAl2O4 nanocrystals is found to be 8% for an excitation in the ultraviolet range. However the quantum efficiency decreases with the insertion of Tb. Photoluminescence excitation experiments and time-resolved photoluminescence both conclusively demonstrate that no energy transfer between Tb and Yb occurs in this host matrix.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2018.06.001