Fig. 4
From: Incorporation of Ln-Doped LaPO4 Nanocrystals as Luminescent Markers in Silica Nanoparticles
a Emission spectrum (red line, λ exc = 250 nm) and excitation spectrum (blue line, λ em = 611 nm) of LaPO4:Eu3+ nanocrystals incorporated into silica spheres dispersed in ethanol. b Decay curve of 611 nm Eu3+ emission for 4 nm LaPO4:Eu3+ NCs incorporated in 28 nm silica spheres dispersed in ethanol excited at 465 nm, τ = 3.8 ms, and the radiative decay curve with QY = 1 (blue line), τ = 6.5 ms. c Emission spectrum (green line, λ exc = 280 nm) and excitation spectrum (blue line, λ em = 543 nm) of LaPO4:Ce3+,Tb3+ NCs incorporated in silica spheres dispersed in ethanol. d Decay curve of LaPO4:Ce3+,Tb3+ NCs incorporated in silica spheres dispersed in ethanol excited at 487 nm, τ = 4.8 ms, and the radiative decay curve with QY = 1 (blue line), τ = 6.9 ms. See text for details concerning the calculation of the purely radiative decay curves