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Well-defined KZnF3:Yb3+, Er3+, Mn2+ nanocubes were successfully prepared by a facile solvothermal method. The XRDand SEM measurements results show that the cubes have good crystallinity and the average cubic size is about 40nm The incorporation of Mn2+ ions into KZnF3:Yb3+, Er3+ leads to the great increase in the red to green luminescence intensity ratios from 10:1 to 214:1 and the red emission was...