The aim of this paper is to study the possibility to improve the efficiency of solar cells by using downconversion of high energy photons into low energy ones thanks to the Tb3+/Yb3+ energy transfert mechanism in 70SiO2-30HfO2 glass-ceramic waveguides. The preparation of the waveguides by a sol-gel method is first presented. Then results of compositional and optical (Photoluminescence) characterization are given. The result found is that the transfer efficiency is about 38% for the sample with the highest concentration of rare earths (5%).
Energy transfer from Tb3+ to Yb3+ in silica hafinia glass ceramic for photovoltaic applications
Enrichi, F.;
2016-01-01
Abstract
The aim of this paper is to study the possibility to improve the efficiency of solar cells by using downconversion of high energy photons into low energy ones thanks to the Tb3+/Yb3+ energy transfert mechanism in 70SiO2-30HfO2 glass-ceramic waveguides. The preparation of the waveguides by a sol-gel method is first presented. Then results of compositional and optical (Photoluminescence) characterization are given. The result found is that the transfer efficiency is about 38% for the sample with the highest concentration of rare earths (5%).
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