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Design and optimization of 26.3% efficient perovskite/FeSi2 monolithic tandem solar cell
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Design and optimization of 26.3% efficient perovskite/FeSi2 monolithic tandem solar cell
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Journal Article
Design and optimization of 26.3% efficient perovskite/FeSi2 monolithic tandem solar cell
2020
Overview
A multijunction or tandem technique comprising a wide bandgap top cell and a narrow bandgap bottom cell may be a major stepping stone in an attempt to obtain high-efficiency solar cells. However, easier said than done, it takes a lot to correctly optimize the structure of all the involved layers so as to possibly obtain the desired results. In this paper, a perovskite (CH
3
NH
3
PbI
3
)/FeSi
2
(p-i-n structure) 2-terminal (2-T) monolithic tandem solar cell is proposed and investigated using AFORS-HET v2.5 1D simulator. A hydrogenated amorphous silicon (a-Si:H)/hydrogenated microcrystalline silicon oxide (
µ
c-Si
1−
x
O
x
:H) tunnel recombination junction is employed to interconnect both perovskite and FeSi
2
solar cell for current matching. The influence of both top and bottom absorber layer thickness is analyzed to optimize the device performance. The study reveals an optimized 26.3% efficient perovskite/FeSi
2
monolithic tandem solar cell with J
SC
(21.4 mA cm
−2
), V
OC
(1.63 V), and FF (74.86%). The results in this paper suggest FeSi
2
material with 0.87 eV bandgap as an alternative for narrow bandgap bottom cell for the perovskite-based tandem solar cells so as to obtain much higher efficiencies.
Publisher
Springer US,Springer Nature B.V
