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Device optimization of FASnI3 / MAPbI3 tandem solar cells: evaluating carrier recombination and engineering parameters for high PCE
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Device optimization of FASnI3 / MAPbI3 tandem solar cells: evaluating carrier recombination and engineering parameters for high PCE
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Journal Article
Device optimization of FASnI3 / MAPbI3 tandem solar cells: evaluating carrier recombination and engineering parameters for high PCE
2024
Overview
This study introduces the design and optimization of a perovskite-–perovskite tandem solar cell (PPTSC) composed of all perovskite absorber materials. The optimization process involved individual tuning of top and bottom perovskite solar cells, comprising MAPbI
3
and FASnI
3
, respectively. Various material properties, including thickness, electrical characteristics, and recombination mechanisms such as radiative recombination, Auger electron, Auger hole, and band-to-band recombination, have been systematically tuned. After optimizing each subcell independently, the standalone subcells have been then integrated into PPTSC. The optimum PPTSC thickness has been determined by achieving a matching current for each subcell. By changing each subcell's thickness, a current matching
J
sc
of 13.4 mA/cm
2
has been achieved with a 135 nm top subcell thickness and a bottom subcell thickness of 400 nm. Under these conditions of current matching, the designed device indicated that the tandem cell would exhibit a notably enhanced voltage in the open circuit (
V
oc
) of 3.080 V. Consequently, this configuration would result in an impressive efficiency of 38.5%, surpassing the individual efficiencies of each subcell.
Publisher
Springer US,Springer Nature B.V
