The green upconversion emission mechanism investigation of GdVO4:Yb3+, Er3+ via tuning of the sensitizer concentration

• The samples show the pure green upconversion luminescence.
• The spectrum consisted of transition bands between Er3+ and Yb3+.
• The energy transition probability is changed by Yb3+ concentration.

GdVO4:Yb3+, Er3+ powder was synthesized by a conventional solid state reaction. The XRD pattern confirmed that the GdVO4:Yb3+, Er3+ powder phosphors have tetragonal structure. The up-conversion photoluminescence (UCPL) spectrum consisted of 2H11/2 → 4I15/2 (525 nm) and 4S3/2 → 4I15/2 (554 nm) transition. The UCPL intensity of 2H11/2 → 4I15/2 (525 nm) is stronger than 4S3/2 → 4I15/2 (554 nm) by adjusting Yb3+ concentrations. In order to explain this behavior, we investigated a pump power dependence.

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