Abstract
To make use of broad spectrum solar energy remains a main target in the photoelectrochemical area. Novel promising photoelectrode CeO2:Fe/Yb/Er nanomaterials supported on upconversion nanomaterials doped with transition-metal ions are reported to improve broad spectrum absorption and scattering properties in dye-sensitized solar cells (DSSCs) for the first time. The results demonstrate that the materials have stronger upconversion luminescence than CeO2:Yb/Er samples when the Fe3+ ion doping concentration is 2 mol% and 33.5% higher photoelectric conversion efficiency than a pure P25 electrode, which are attributed to the special light scattering properties and excellent dye adsorption capacity of the CeO2:Fe/Yb/Er nanomaterials. Accordingly, doping Fe3+ transition metal ions in the upconversion material CeO2:Yb/Er provides a new research idea for improving the photoelectric conversion efficiency of DSSCs.
Highlights
In today's deepening energy crisis, the inexhaustible solar energy has received more and more attention because of its safety, sustainability, and carbon-free nature.[1]
In the photovoltaic industries using solar energy, dye-sensitized solar cells are photoelectrochemical systems with dye-adsorbed porousstructured oxides as photoanodes, which have the advantages of low cost, high efficiency and good stability.[2]
The use of Fe3+ ions alone in batteries has a number of drawbacks, so we have introduced Fe3+ into dye-sensitized solar cells (DSSCs) by codoping
Summary
In today's deepening energy crisis, the inexhaustible solar energy has received more and more attention because of its safety, sustainability, and carbon-free nature.[1] In the photovoltaic industries using solar energy, dye-sensitized solar cells are photoelectrochemical systems with dye-adsorbed porousstructured oxides as photoanodes, which have the advantages of low cost, high efficiency and good stability.[2] the problem of spectral mismatch between the incident solar spectrum and the band gap of the semiconductor photoanode greatly reduces the utilization of sunlight by the battery. Enlarging the range of absorbable wavelengths in sunlight is one of the effective measures to reduce energy loss.[3]. Up-conversion nanophosphors (UCNPs) with nonlinear optical effects can convert NIR light into visible light by means of energy transfer or multiple absorptions.[4] the dye molecule absorbs visible light and produces more electrons, which promotes the conversion of sub-band gap photons into above-band gap photons to decrease transmission loss.
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