Self-Position
of Au NPs in Perovskite Solar Cells: Optical and Electrical Contribution
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Abstract
Metallic
nanoparticles (NPs) exhibit a localized surface plasmon resonance
(LSPR) and act as scattering centers and subwavelength antennas, so
metallic NPs can be incorporated into perovskite solar cells (PSCs)
to effectively improve the light absorption of light harvesting devices.
Here, we have embedded Au nanoparticles (NPs) into the hole transport
layer (HTL) of the PSCs to investigate the photovoltaic effect of
the PSCs with Au NPs. Interestingly, it was found that Au NPs dispersed
spiro-OMeTAD HTL solution could naturally end up located near the
perovskite layer as the result of the spin-coating step. Solar cell
performance observations indicate that the LSPR and electrical effects
of Au NPs enhance the photovoltaic response of PSCs, in spite of a
slight decrease in the open-circuit voltage (<i>V</i><sub>OC</sub>), by causing an incredible improvement in the photocurrent
density as a dominant factor