  Perovskite solar cells have shown power conversion efficiencies (PCE)
comparable to cystalline silicon solar cell despite involving low-temperature,
solution based synthesis processes outside clean room environment. As the
theoretical PCE of a perovskite solar cell with band gap 1.55 eV is capped to
33 % due to Shockley-Queisser limit, tandem configurations are being
investigated to go beyond this limit. Here, we propose a two-terminal (2T)
tandem solar cell structure consisting of perovskite and multilayer transition
metal dichalcogenide as the absorber layers of the top and the bottom subcells,
respectively and investigate their performance parameters using Solar Cell
Capacitance Simulator-1 Dimension (SCAPS-1D) software package. We demonstrate
that the 2T tandem solar cell consisting of CH3NH3PbI3 with band gap 1.55 eV
and MoTe2 with bandgap 1.1 eV shows PCE of maximum 35.3 % under AM 1.5 G
illumination. This work motivates experimental realization of such solar cells
for further investigation.
