In
this work, SiO2 nanoparticles (NPs) were integrated
into the mesoporous TiO2 layer of a perovskite solar cell
to investigate their effect on cell performance. Different concentrations
of SiO2/ethanol have been combined in TiO2/ethanol
to prepare pastes for the fabrication of the mesoporous layer with
which perovskite solar cells have been fabricated. Addition of SiO2 NPs of 50 and 100 nm sizes produces an enhancement of cell
performance mainly because of an improvement of the photocurrent.
This increment is in good agreement with the theoretical predictions
based on light scattering induced by dielectric SiO2 NPs.
The samples using modified scaffolds with NPs also present a significant
lower current–potential hysteresis indicating that NP incorporation
also affects the ion accumulation at the perovskite interface, providing
an additional beneficial effect. The results stress the importance
of the appropriated management of the optical properties on further
optimization of perovskite solar cell technology.
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