Lead-free All-perovskite Tandem Solar Cell
ORAL
Abstract
We present simulation results obtained with the SCAPS-1D simulation package of a lead-free all-perovskite
tandem solar cell. The top and bottom subcells, consisting of MAGeI3, and FASnI3, respectively, were optimized
individually by varying material properties such as thickness, electron affinity, and capture cross-section. These
standalone optimized subcells are then utilized for the tandem structure. The optimal tandem cell thickness was
determined based on short circuit current density (JSC) matching of the standalone subcells by varying the
subcells’ thickness. A matching JSC of 14.70 mA/cm2 was obtained for the top and bottom subcell thickness of
983 nm and 1600 nm, respectively. At this current matching condition, the simulations show that a tandem cell
would yield a high open-circuit voltage (VOC) of 2.63 V, resulting in an efficiency of 30.85%, significantly higher
than that of each subcell.
tandem solar cell. The top and bottom subcells, consisting of MAGeI3, and FASnI3, respectively, were optimized
individually by varying material properties such as thickness, electron affinity, and capture cross-section. These
standalone optimized subcells are then utilized for the tandem structure. The optimal tandem cell thickness was
determined based on short circuit current density (JSC) matching of the standalone subcells by varying the
subcells’ thickness. A matching JSC of 14.70 mA/cm2 was obtained for the top and bottom subcell thickness of
983 nm and 1600 nm, respectively. At this current matching condition, the simulations show that a tandem cell
would yield a high open-circuit voltage (VOC) of 2.63 V, resulting in an efficiency of 30.85%, significantly higher
than that of each subcell.
*The authors are thankful for the funding support of the NationalAeronautics and Space Administration under Agreement No.80NSSC19M0140 issued through NASA Oklahoma EPSCoR.
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Publication: https://doi.org/10.1016/j.optmat.2021.111891
Presenters
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Arman Duha
- Oklahoma State University-Stillwater