Highly Efficient Monolithic Perovskite/TOPCon Silicon Tandem Solar Cells Enabled by “Halide Locking”

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Perovskite/silicon tandem solar cells (TSCs) are promising candidates for commercialization due to their outstanding power conversion efficiencies (PCEs). However, controlling the crystallization process and alleviating phases/composition inhomogeneity represent a considerable challenge perovskite layers grown on rough silicon substrates, ultimately limiting efficiency stability of TSC. Here, this study reports “halide locking” strategy that simultaneously modulates nucleation crystal growth wide bandgap perovskites by introducing multifunctional ammonium salt, thioacetylacetamide hydrochloride (TAACl), bind with all types cations anions in mixed halide precursor. The approach not only enables excellent compositional uniformity wet‐film stage but also induces preferred orientation along (001) plane following nucleation, leading enhanced homogeneity film both vertical horizontal directions over long‐length scales. resulting wide‐bandgap yield exceptional open‐circuit voltage‐fill factor products ( V OC × FF) 1.074 1.040 small‐ (0.0414 cm 2 ) large‐area (1.0208 devices, respectively. Corresponding based Tunnel Oxide Passivated Contact (TOPCon) subcells achieve record PCE 31.32% remarkable 1.931 FF 81.54%.

Language: Английский

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Crystallization Regulation by Self‐Assembling Liquid Crystal Template Enables Efficient and Stable Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(52)

Published: Nov. 9, 2023

It is found that the disordered growth of bottom perovskite film deteriorates buried interface solar cells (PSCs), so developing a new material to modify for regulating crystal and defect passivation an effective approach improving photovoltaic performance PSCs. Here, we developed ionic liquid (ILC, 1-Dodecyl-3-methylimidazolium tetrafluoroborate) as both regulator passivator The high lattice matching between this ILC promotes preferential along [001] direction, while oriented with mesomorphic phase has strong chemical interaction passivate defect, result, modified exhibits suppressed defects, improved band alignment, reduced nonradiative recombination losses, enhanced charge extraction. ILC-modified PSC delivers power conversion efficiency 24.92 % maintains 94 original value after storage in ambient 3000 h.

Language: Английский

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In situ dipole formation to achieve high open-circuit voltage in inverted perovskite solar cells via fluorinated pseudohalide engineering

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(12), P. 5763 - 5774

Published: Jan. 1, 2023

Many studies have shown that the severe photoluminescence quantum yield (PLQY) loss at interface between perovskite and electron transport layer (ETL) is main cause of voltage in inverted solar cells (p-i-n PSCs). However, currently there are no effective situ passivation techniques to minimize this nonradiative recombination. Here, fluorinated pseudohalide ionic liquid (FPH-IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIMTFSI) introduced into precursor formulation. EMIMTFSI can change dielectric environment energy-level arrangement by accumulating on top surface spontaneously forming dipoles. As a result, excitonic binding energy (Eb) recombination significantly reduced. At same time, TFSI- reduces formation vacancy defects stabilizes phase N-H⋯F hydrogen bonds FA+ C-F bond EMIMTFSI. Finally, EMIMTFSI-modified p-i-n PSCs achieve an excellent efficiency 24.81% with impressive open-circuit 1.191 V for 1.57 eV low-bandgap perovskite. In addition, modified devices maintain more than 95% PCE after continuous thermal aging 85 °C 500 h or illumination maximum power point 800 h. This work provides new idea minimizing non-radiative losses PSCs.

Language: Английский

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

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 17(5), P. 1781 - 1818

Published: Dec. 5, 2023

Monolithic perovskite-based triple junction solar cells have the potential to surpass power conversion efficiency (PCE) limits of single and dual-junction cells.

Language: Английский

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Surface engineering based on ionic liquids for efficient and stable CsPbI₃ perovskite solar cells

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(13), P. 7847 - 7855

Published: Jan. 1, 2024

TBAPF6 ionic liquid is employed to treat CsPbI3 perovskite films, and thereby low-dimensional [TBA]PbI3 forms on the surface defects are passivated, which contribute longer moisture stability higher PCE.

Language: Английский

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