New microarchitectures of (Er,Yb):Lu2O3 nanocrystals embedded in PMMA: synthesis, structural characterization, and luminescent properties

Table 1 Unit cell parameters of (Er,Yb):Lu₂O₃nanocrystals and of undoped Lu₂O₃, Er₂O₃, and Yb₂O₃as reference

Stoichiometric formula^a	Active ion (at.%)		a(Å)	V(Å³)	Particle size (nm)^b
Stoichiometric formula^a	Er	Yb	a(Å)	V(Å³)	Particle size (nm)^b
Lu₂O₃^c			10.39	1,121.62
Lu_0.990 Er_0.520 Yb_0.490O₃	25	25	10.4417 (4)	1,138.45(8)	14.9
Er₂O₃^d			10.54800	1,173.57
Yb₂O₃^e			10.43470	1,136.16

^aMeasured by EPMA; ^bcalculated using Scherrer's equation; ^cJCPDS Lu₂O₃ (43–1021); ^dJCPDS Er₂O₃ (43–1007); ^eJCPDS Yb₂O₃ (41–1106).