1 research outputs found
Efficient Carrier Separation and Intriguing Switching of Bound Charges in Inorganic–Organic Lead Halide Solar Cells
We fabricated a mesoporous perovskite
solar cell with a ∼14%
conversion efficiency, and we investigated its beneficial grain boundary
properties of the perovskite solar cells through the use of scanning
probe microscopy. The CH<sub>3</sub>NH<sub>3</sub>PbÂ(I<sub>0.88</sub>,Br<sub>0.12</sub>)<sub>3</sub> showed a significant potential barrier
bending at the grain boundary and induced passivation. The potential
difference value in the <i>x</i> = 0.00 sample is ∼50
mV, and the distribution of the positive potential is lower than that
of the <i>x</i> = 0.12 sample. We also investigated the
polarization and hysteretic properties of the perovskite thin films
by measuring the local piezoresponse. Specifically, the charged grain
boundaries play a beneficial role in electron–hole depairing
and in suppressing recombination in order to realize high-efficiency
perovskite solar cells