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Minimizing Current and Voltage Losses to Reach 25% Efficient Monolithic Two-Terminal Perovskite–Silicon Tandem Solar Cells

Journal Article · · ACS Energy Letters
The rapid rise in efficiency and tunable bandgap of metal-halide perovskites makes them highly attractive for use in tandems on silicon. Recently we demonstrated a perovskite–silicon monolithic two-terminal tandem with 23.6% power conversion efficiency. Here, we present work on optical optimization to improve light harvesting that includes thinning out the top transparent electrode to reduce front-surface reflection and parasitic absorption; introducing metal fingers to minimize series resistance losses; and further minimizing reflection loss with a polydimethylsiloxane (PDMS) stamp with random, pyramidal texture. Additionally, to reduce voltage loss while achieving current matching, we employ poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) as a hole transport material instead of NiOx and a wider 1.68 eV bandgap perovskite composition. Furthermore, these optimizations boost the open-circuit voltage to 1.77 V and the short-circuit current density to 18.4 mA/cm2, culminating in a 25% efficient perovskite–silicon tandem with a 1 cm2 active area.
Research Organization:
Stanford Univ., CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
Grant/Contract Number:
EE0008167
OSTI ID:
1693709
Alternate ID(s):
OSTI ID: 1539559
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 9 Vol. 3; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Solar cell efficiency tables (version 50)
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Cited By (17)

Light Management Enhancement for Four-Terminal Perovskite-Silicon Tandem Solar Cells: The Impact of the Optical Properties and Thickness of the Spacer Layer between Sub-Cells journal December 2018
Efficient Light Management in a Monolithic Tandem Perovskite/Silicon Solar Cell by Using a Hybrid Metasurface journal May 2019
Interface Molecular Engineering for Laminated Monolithic Perovskite/Silicon Tandem Solar Cells with 80.4% Fill Factor journal August 2019
Semitransparent Perovskite Solar Cells: From Materials and Devices to Applications journal August 2019
Infrared Light Management Using a Nanocrystalline Silicon Oxide Interlayer in Monolithic Perovskite/Silicon Heterojunction Tandem Solar Cells with Efficiency above 25% journal February 2019
Enhanced Nucleation of Atomic Layer Deposited Contacts Improves Operational Stability of Perovskite Solar Cells in Air journal October 2019
Monolithic Perovskite/Si Tandem Solar Cells: Pathways to Over 30% Efficiency journal April 2020
Wide‐Bandgap Perovskite/Gallium Arsenide Tandem Solar Cells journal December 2019
Two‐terminal Perovskite silicon tandem solar cells with a high‐Bandgap Perovskite absorber enabling voltages over 1.8 V
  • Bett, Alexander J.; Schulze, Patricia S. C.; Winkler, Kristina M.
  • Progress in Photovoltaics: Research and Applications, Vol. 28, Issue 2 https://doi.org/10.1002/pip.3208
journal November 2019
Two‐Terminal Perovskites Tandem Solar Cells: Recent Advances and Perspectives journal May 2019
Light Management in Monolithic Perovskite/Silicon Tandem Solar Cells journal August 2019
Atomic Layer Deposition of Functional Layers in Planar Perovskite Solar Cells journal October 2019
Atomic layer deposition of vanadium oxide to reduce parasitic absorption and improve stability in n–i–p perovskite solar cells for tandems journal January 2019
Highly efficient monolithic perovskite silicon tandem solar cells: analyzing the influence of current mismatch on device performance journal January 2019
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Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems journal March 2020

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