Vicente D. Rodríguez, Victor K. Tikhomirov, Jose J. Velázquez, Mikhail V. Shestakov and Victor V. Moshchalkov Visible-to-UV/Violet Upconversion Dynamics in Er3+-Doped Oxyfluoride Nanoscale Glass Ceramics Advanced Optical Materials 1
An efficient UV/violet upconversion luminescence is found under green excitation of Er3+, obtaining intensities comparable to that of the resonant green emission. This intensity increases with the square of the pump power, without saturation effects even for relatively high pump-power densities. A comprehensive analysis of the involved upconversion mechanisms is presented. These materials could be useful to enhance the efficiency of the water-splitting systems.
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