Abstract:
Perovskite nanostructures have been prepared via electrospinning technique using polyvinyl alcohol
and methylammonium lead iodide (CH3NH3PbI3 – perovskite). In the electrospinning experiment, the
formation of different nanostructures was observed for different applied voltages (0-D nanodots for 10 kV,
1-D nanofibers for 20 kV, and 3-D nanocubes for 30 kV). The X-ray diffraction pattern of the samples
synthesized, revealed the existence of perovskite nanostructures with tetragonal phase. The energy
dispersive X-ray analysis indicates the stoichiometric presence of lead, iodine, carbon and nitrogen in the
synthesized perovskite materials. The absorbance spectra have been also recorded and consequently, the
optical band gap energy was found to be in the range of 1.45 to 1.52 eV which is quite close to the optimum
theoretical value (1.5 eV) required for solar cell application for interfacial absorber materials. The
photoluminescence spectra of the prepared methylammonium lead iodide perovskites exhibited a broad
band at 780 nm which corresponds to the band-to-band transition of the perovskite nanostructures.
Hence, the perovskite nanostructures synthesized could be possibly used as an interfacial modifier in
perovskite solar cells for enhancing the charge transport between the active absorber layer and the
transporting layers.
