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Yb3+/Ho3+ codoped LiLuF4 microparticles have been successfully prepared via a facile hydrothermal method. The crystal phase and morphology of LiLuF4 microparticles were inspected by x-ray diffraction and scanning electron microscope, respectively. The upconversion emission of single LiLuF4: Yb3+/Ho3+ microparticle was carefully studied by a confocal microscopy setup under NIR 980 nm excitation. With...
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