OHâ ions-controlled synthesis and upconversion luminescence properties of NaYF4:Yb3+,Er3+ nanocrystals via oleic acid-assisted hydrothermal process
Keywords: لومینسانس Upconversion; NaYF4:Yb3+,Er3+ nanocrystals; OHâ ions; phase transition; morphology evolution; upconversion luminescence; rare earths;