Synthesis and Characterization of Upconversion Fluorescent Yb^𝟑+, Er^𝟑+ Doped CsY_𝟐F_𝟕 Nano- and Microcrystals

Figure 1

(a): A line pattern of orthorhombic KEr₂F₇ file number PDF 28-01-086-2454 (b): Observed X-ray powder diffraction profile of the heat treated sample of CsY₂F₇: 78%  Y, 20%  Yb, 2.0%  Er (grey line), Rietveld fit (black line) and residuum, (c): observed X-ray powder diffraction profile of the microwave generated sample of CsY₂F₇: 78%  Y, 20%  Yb, 2.0%  Er (grey line), Rietveld fit (black line) and residuum, (d): observed X-ray powder diffraction profile of CsY₂F₇∶ 78%  Y, 20%  Yb, 2.0%  Er generated in HEEDA (grey line), Rietveld fit (black line) and residuum.