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The thermalisation of charge carriers in the UV-blue
range, generated by the absorption of high-energy photons, is
one of the major loss in silicon-based solar cells. The method
investigated in this work for reducing these energy losses is via
down-conversion (DC) layers doped rare earths ions placed on
the front side of the silicon solar cells, allowing an efficient
conversion from UV-blue photons to near-IR photons. This
paper examines the Tb3+/Yb3+ energy transfer efficiency in a
70SiO230HfO2 glass-ceramics waveguides. The evaluation of the
transfer efficiency between Tb3+ and Yb3+ is obtained by
comparing the luminescence decay of Tb with and without Yb
co-doping ions. A transfer efficiency of 25 % was obtained with
the sample doped with a highest concentration of rare earth