Luminescent Nd3+, Cr3+ codoped YAG nanocrystals for thermal sensing: Influence of the excitation wavelength
Résumé
Al 5 O 12 (YAG) nanocrystals codoped with Nd 3+ and Cr 3+ ions have been produced by a modified solvothermal method. The incorporation of both Nd 3+ and Cr 3+ inside the YAG network has been attested by X-ray diffraction and photoluminescence measurements. Modification of the excitation wavelength leads to ratiometric intensity changes between the luminescence attributed to Nd 3+ and that of Cr 3+. Temperature-dependent luminescence spectra have been analyzed according to the different excitation wavelengths. The highest relative thermal intensity (S r = 2.5%.K − 1) is obtained under a 532 nm excitation, which favors the direct and independent excitation of Cr 3+ and Nd 3+ .
Domaines
Matériaux
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