Pesquisa de Petróleo e Gás

Abstrato

Lead-free perovskites based nanostructured tandem solar cell

Mohammad Kamal Hossain

Tandem solar cell combining silicon and perovskites is known
to be a wonderful match for efficient solar cell design. However,
perovskites is suffering for its stability and silicon is supposed to
be superior in nanostructure features. Therefore, in this communication,
we are proposing an innovative approach to devise silicon
based nanostructures fabricated from top-down strategy and
combining the same with lead-free perovskite that was synthesized
in ambient environment. Preliminary results confirmed successful
and reproducible fabrication of silicon nanopyramids (Si-NPys)
and nanowires (Si-NWs). Morphology of the same nanostructures
was confirmed by scanning electron microscopy. Further finite different
time domain (FDTD) analysis in different solar spectrum
was carried out to understand absorption depth profile, energy
flux distribution, electromagnetic field localization and exciton
generation rate distribution happened to be available in such
nanostructures and influence in exciton generation in perovskite
absorbing materials deposited atop in tandem configuration. Figure
as shown below depicts the evidence of Si-NPys of Si-NWs
growth using Si wafer as initial materials. It is noteworthy to mention
that the dimension of such silicon nanostructures depends
on experimental conditions such as temperature, precursor concentration,
etching time etc.FDTD simulation suggested confined
exciton generation rate distribution in such nanometric structures
and thus active absorbing material such as perovskite would get
enormous influence thereof.Authors acknowledge CoRERE, RI,
KFUPM, Dhahran 31261, Saudi Arabia. MKH acknowledges
Deanship of Scientific Research (DSR) at King Fahd University
of Petroleum & Minerals (KFUPM) for funding this work
through project No. IN151003.