Monolithic Two-Terminal Perovskite/Perovskite/Silicon Triple-Junction Solar Cells with Open Circuit Voltage >2.8 V

Abstract

The efficiency of perovskite/silicon tandem solar cells has exceeded the previous record for III–V-based dual-junction solar cells. This shows the high potential of perovskite solar cells in multi-junction applications. Perovskite/perovskite/silicon triple-junction solar cells are now the next step to achieve efficient and low-cost multi-junction solar cells with an efficiency potential even higher than that for dual-junction solar cells. Here we present a perovskite/perovskite/silicon triple-junction solar cell with an open circuit voltage of >2.8 V, which is the record value reported for this structure so far. This is achieved through employing a gas quenching method for deposition of the top perovskite layer as well as optimization of interlayers between perovskite subcells. Moreover, for the measurement of our triple-junction solar cells, precise measurement procedures are implemented to ensure the reliability and accuracy of the reported values.

Recent progress in monolithic two-terminal perovskite-based triple-junction solar cells

“…Similar to the other reported perovskite/perovskite/silicon solar cells, the j SC of this device was limited by the middle cell. 26…”

“…The perovskite film deposited by the adapted method showed homogeneous and compact morphology with improved crystallinity. 26…”

“…16f and g). 26 Chen et al developed a recombination layer based on a 4 nm IZO on perovskite/organic tandem solar cell (Fig. 16a and b).…”

“…This additional layer also helps to prevent the penetration of solvent during the solution-based processing of the subsequent layers. 26 Beyond this, Choi et al fabricated perovskite/perovskite/silicon triple-junction solar cells without the SnO x buffer layer. 15 To enable fabrication of ALD free interconnection layer, Polyethylenimine ethoxylated (PEIE) in methanol was first spin coated on C 60 similar to the approach outlined in ref.…”

“…For the measurement of perovskite/perovskite/silicon triple-junction solar cell in our group, the above mentioned requirements were fulfilled. 26 The jV measurement was performed with LED-based solar simulator. The spectrum of the solar simulator was adjusted based on the SR of the three subcells using the method developed in ref.…”