Enhancement of the Photovoltaic Performance of Dye‐Sensitized Solar Cells by Doping Y_0.78Yb_0.20Er_0.02F₃ in the Photoanode

Abstract

Y0.78Yb0.20Er0.02F3 is introduced into the TiO2 photoanode in a dye‐sensitized solar cell (DSSC). Y0.78Yb0.20Er0.02F3 improves infrared light harvesting via up‐conversion luminescence and thus increases the photocurrent. Yb3+/Er3+ elevates the energy level of the TiO2 electrode and thus increases the photovoltage.

Overcoming ultraviolet light instability of sensitized TiO2 with meso-superstructured organometal tri-halide perovskite solar cells

“…With regard to the second option, down-converting nanoparticles have been demonstrated to efficiently absorb UV light and re-emit visible light that can be harvested by the sensitizer in DSSCs 49,50 . Developing such routes to harvest all of the light of shorter wavelengths than 435 nm before it reaches the mesoporous TiO 2 , should allow for enhanced stability without the cost of decreased photocurrents 49,50 . With regard to removing the TiO 2 altogether, we have recently developed perovskite-based MSSCs, within which the mesoporous n-type TiO 2 is replaced with an insulating mesoporous Al 2 O 3 scaffold (Fig.…”

Synthesis and characterization of Ho3+-doped strontium titanate downconversion nanocrystals and its application in dye-sensitized solar cells

“…This double function is very significant for enhancing the photovoltaic performance of the DSSCs. Unfortunately, little significant research on conversion luminescence and/or p-type doping effect by rare-earth ions in the DSSCs has been attempted [9][10][11]. Until now, as the highest magnetic moments among the rare earth metal ions, holmium (III) has been used widely as a magnetic material [12].…”

Towards near-infrared photosensitization of tungsten trioxide nanostructured films by upconverting nanoparticles

“…This low efficiency was attributed to the inefficient absorption of the red upconverted light by the dye and the charge carrier recombination at the nanocomposite/electrolyte interface. Several papers have recently been published on the use of UCNPs in DSSCs [57,58,59,60,61]. Recently, several reviews have focused on the use of UCNPs in photovoltaics [62,43,63,64].…”

“…Combining UC materials and metal oxide semiconductors represents an interesting approach to photosensitize the semiconductors in the NIR region of the solar spectrum, since the photons absorbed by the UC material can, after upconversion, be harvested by the semiconductor to eventually generate a photocurrent [56,86,87,88,89,57,90].…”