Abstract
Well dispersed orthorhombic structure KYb2F7:2 mol.%Er3+ and KYb3F10:2 mol.%Er3+ nanoparticles were synthesized through solvothermal method. Measurements of X-ray diffraction (XRD), transmission electron microscopy (TEM) and upconversion spectra showed excellent morphology and optical properties of the as-prepared samples. The intensity ratio of the red emission (650 nm) to the green emission (545 nm) in these two materials was much stronger than that in other Er3+ doped materials. The transition mechanism of the processes was investigated and discussed. Due to their strong red emission, the samples are promising for applications in display, color tuning, and biolabeling.
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