Upconversion luminescence properties of the novel garnet structure Ca2LaZr2Ga3O12:Yb3+,Er3+/Tm3+ phosphors

Broadband NIR Garnet Phosphors with Improved Thermal Stability via Energy Transfer

“…The diffraction peaks in the magnified XRD patterns gradually shift to a larger angle with Yb 3+ content, attributed to the lattice shrinkage because of the cation substitution of smaller Yb 3+ ( r = 0.985 Å, coordination number (CN) = 8) for larger La 3+ ( r = 1.16 Å, CN = 8) . To verify the structure of CZGG, the Rietveld refinement of XRD patterns of CZGG: x Cr 3+ ( x = 0.005, 0.06) and CZGG: 0.06Cr 3+ , y Yb 3+ ( y = 0.01, 0.03, 0.1) were determined by using Sr 3 Sc 2 Ge 3 O 12 (PDF#29-1313) as a starting model Figure b shows the experimental, calculated, and different XRD patterns of CZGG: 0.06Cr 3+ , and the relative crystallographic data as well as all of the XRD patterns and refinement parameters of CZGG: Cr 3+ and CZGG: Cr 3+ , Yb 3+ are summarized in Figures S1–2 and Table S1 (Supporting Information (SI)).…”

“…36 To verify the structure of CZGG, the Rietveld refinement of XRD patterns of CZGG: xCr 3+ (x = 0.005, 0.06) and CZGG: 0.06Cr 3+ , yYb 3+ (y = 0.01, 0.03, 0.1) were determined by using Sr 3 Sc 2 Ge 3 O 12 (PDF#29-1313) as a starting model. 37 Figure 1b shows the experimental, calculated, S1 (Supporting Information (SI)). The factors of R wp , R p , and X 2 are acceptable, which confirms the phase purity.…”