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Dual functions of YF3:Eu3+ for improving photovoltaic performance of dye-sensitized solar cells
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Dual functions of YF3:Eu3+ for improving photovoltaic performance of dye-sensitized solar cells
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Journal Article
Dual functions of YF3:Eu3+ for improving photovoltaic performance of dye-sensitized solar cells
2013
Overview
In order to enhance the photovoltaic performance of dye-sensitized solar cell (DSSC), a novel design is demonstrated by introducing rare-earth compound europium ion doped yttrium fluoride (YF
3
:Eu
3+
) in TiO
2
film in the DSSC. As a conversion luminescence medium, YF
3
:Eu
3+
transfers ultraviolet light to visible light via down-conversion and increases incident harvest and photocurrent of DSSC. As a p-type dopant, Eu
3+
elevates the Fermi level of TiO
2
film and thus heightens photovoltage of the DSSC. The conversion luminescence and p-type doping effect are demonstrated by photoluminescence spectra and Mott-Schottky plots. When the ratio of YF
3
:Eu
3+
/TiO
2
in the doping layer is optimized as 5 wt.%, the light-to-electric energy conversion efficiency of the DSSC reaches 7.74%, which is increased by 32% compared to that of the DSSC without YF
3
:Eu
3+
doping. Double functions of doped rare-earth compound provide a new route for enhancing the photovoltaic performance of solar cells.
