Dynamics of the Green and Red Upconversion Emissions in Yb³⁺-Er³⁺-Codoped Y₂O₃ Nanorods

Table 2

Experimental and simulated lifetimes, quantum efficiencies, and microinteraction parameters.

Solvent Ratio [water : ethanol]		1 : 10		1 : 5
		Experimental	Simulation	Experimental	Simulation
Effective lifetimes [𝜇s ]	𝜏e(Er^10)	6046.2	6002.9	6818.2	6779.5
	𝜏e(Er^30)	269.4	284.8	290.5	316.1
	𝜏e(Er^40)	248.4	283.0	250.3	298.4
	𝜏e(Yb^10)	344.9	352.1	416.9	291.3
Visible emission quantum efficiency	Q(Er^30)	0.4183	0.4422	0.4511	0.4908
	Q(Er^40)	0.3559	0.4080	0.3586	0.4275
Dipole-dipoleMicro interactionParameters [cm^6/s]	C(Yb^10→Er^02)	2.4719 × 10^-34		6.4800 × 10^-35
	C(Yb^10→Er^13)	1.6340 × 10^-34		1.6340 × 10^-34
	C(Yb^10→Er^24)	1.0475 × 10^-34		1.0475 × 10^-34