Abstract:
Electron transport layer (ETL) plays a crucial role in the performance of
perovskite solar cell (PSC). Charged with the task of electron extraction and
delivering them to their respective electrode, they play a vital role in enhancing the
overall performance of the solar cell (SC). A number of materials, particularly metal
oxide (MO) and their composites have been tested for this role. Tin Oxide (SnO2)
and its composites have shown superior properties that have proven crucial for
enhancing the performance of SC by improving the charge extraction properties of
the layer. Therefore, this paper presents the study of composite of SnO2 with the
pristine nano flakes of Molybdenum Disulfide (MoS2), a new emerging material for
SC application. The addition of 20% (v/v%) MoS2 in SnO2 has not only improved
the crystallinity of SnO2 but also resulted in enhanced and larger grain size for
perovskite absorber layer. In addition to this, the flakes also cause an increase in
charge carrier concentration and conductivity of the film. Furthermore, due to the
incorporation of flakes the charge carrier kinetics at the ETL/perovskite interface
was also reduced leading to lower recombinations and improved charge transport at
the interface indicating that the SnO2 and MoS2 composite will be a suitable option
as an ETL for development of PSC
