Strain Regulation of Mixed‐Halide Perovskites Enables High‐Performance Wide‐Bandgap Photovoltaics

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: Feb. 20, 2024

Abstract Wide‐bandgap mixed‐halogen perovskite materials are widely used as top cells in tandem solar cells. However, serious open‐circuit voltage ( V oc ) loss restricts the power conversion efficiency (PCE) of wide‐bandgap (PSCs). Herein, it is shown that resulting methylammonium vacancies induce lattice distortion chloride‐assisted film, an inhomogeneous halogen distribution and low . Thus, a strain regulation strategy reported to fabricate high‐performance PSCs. Rubidium (Rb) cations introduced fill A‐site vacancy caused by volatilization, which alleviates shrinkage crystal. The reduced increased halide ion migration barrier result homogeneous mixed‐halide film. Due improved carrier transport suppressed nonradiative recombination, Rb‐treated PSC (1.68 eV) achieves excellent PCE 21.72%, accompanied high 1.22 V. device maintains more than 90% its initial after 1500 h under 1‐sun illumination conditions.

Language: Английский

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All-perovskite tandem solar cells achieving >29% efficiency with improved (100) orientation in wide-bandgap perovskites

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

Published: Jan. 10, 2025

Language: Английский

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Molecular cation passivation and bromine vacancy supplement strategy for efficient wide-bandgap perovskite solar cells

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160339 - 160339

Published: Feb. 1, 2025

Language: Английский

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Buried Interface Modulation Using Self‐Assembled Monolayer and Ionic Liquid Hybrids for High‐Performance Perovskite and Perovskite/CuInGaSe₂ Tandem Photovoltaics

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

Published: Jan. 6, 2025

Effective modifications for the buried interface between self-assembled monolayers (SAMs) and perovskites are vital development of efficient, stable inverted perovskite solar cells (PSCs) their tandem photovoltaics. Herein, an ionic-liquid-SAM hybrid strategy is developed to synergistically optimize uniformity SAMs crystallization above. Specifically, ionic liquid 1-butyl-3-methyl-1H-imidazol-3-iumbis((trifluoromethyl)sulfonyl)amide (BMIMTFSI) incorporated into SAM solution, enabling reduced surface roughness, improved wettability, a more evenly distributed potential film. Leveraging this optimized substrate, favorable growth high-quality crystals achieved. Furthermore, introduced functional ions readily bond with perovskites, effectively passivating undesirable cation or halide vacancies near interface. Remarkably, high power conversion efficiencies (PCEs) 25.68% 22.53% obtained normal-bandgap (≈1.55 eV) wide-bandgap (WBG) (≈1.66 PSCs along operational stability. Additionally, champion PCE 19.50% achieved semitransparent WBG PSCs, further delivering impressive 28.34% integrated four-terminal photovoltaics when combined CuInGaSe2 cells.

Language: Английский

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A Generic Strategy to Stabilize Wide Bandgap Perovskites for Efficient Tandem Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(9)

Published: Dec. 8, 2023

Abstract Efficient wide bandgap (WBG) perovskite solar cells (PSCs) are essential for fully maximizing the potential of tandem cells. However, these currently face challenges such as high photovoltage losses and presence phase segregation, which impede attainment their expected efficiency stability. Herein, root cause halide segregation is investigated, uncovering a close association with locally aggregated lead iodide (PbI 2 ), particularly at perovskite/C 60 interface. Kelvin‐probe atomic force microscopy results indicate that remaining PbI interface leads to electrical differences between domain surface boundaries, drives formation segregation. By reacting residue ethanediamine dihydroiodide (EDAI ) proper temperature, it possible effectively mitigate applying this reaction strategy in WBG inverted cells, notable improvement ≈100 mV achieved over range (1.67–1.78 eV), resulting champion 23.1% (certified 22.95%) 1.67 eV 19.7% 18.81%) 1.75 Furthermore, 26.1% demonstrated monolithic all‐perovskite cell.

Language: Английский

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Performance enhancement of eco-friendly Cs3Sb2I9-based perovskite solar cell employing Nb2O5 and CuI as efficient charge transport layers

Micro and Nanostructures, Journal Year: 2023, Volume and Issue: 183, P. 207676 - 207676

Published: Oct. 3, 2023

Language: Английский

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Efficient Semi-Transparent Wide-Bandgap Perovskite Solar Cells Enabled by Pure-Chloride 2D-Perovskite Passivation

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: April 30, 2023

Wide-bandgap (WBG) perovskite solar cells suffer from severe non-radiative recombination and exhibit relatively large open-circuit voltage (V

Language: Английский

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Crystallization Regulation and Defect Passivation for Efficient Inverted Wide‐Bandgap Perovskite Solar Cells with over 21% Efficiency

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(4)

Published: Nov. 30, 2023

Abstract Wide‐bandgap (WBG) perovskite solar cells (PSCs) have drawn great attention owing to their promising potential for constructing efficient tandem cells. However, the rapid crystallization results in poor film properties and easy formation of defects, thereby greatly restricting acquisition a small open‐circuit voltage ( V OC ) deficit due severe nonradiative recombination. Herein, it introduced triethanolamine borate (TB) effectively slow down preparing highly crystalline uniform WBG films with reduced defects. The strong intermolecular interaction (e.g., coordination hydrogen bond) between TB can suppress halide vacancy inhibit phase segregation improving long‐term stability. devices based on 1.65 eV absorber achieved high efficiency 21.55% 1.24 V, demonstrating is as low 0.41 which one lowest reports. By combining semitransparent subcell narrow‐bandgap tin‐based PSC, four‐terminal cell delivers 26.48%.

Language: Английский

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Numerical optimization of interface engineering parameters for a highly efficient HTL-free perovskite solar cell

Materials Today Communications, Journal Year: 2024, Volume and Issue: 39, P. 108957 - 108957

Published: April 17, 2024

Language: Английский

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Improving the Efficiency and Stability of MAPbI₃ Perovskite Solar Cells by Dipeptide Molecules

Small, Journal Year: 2024, Volume and Issue: 20(25)

Published: Jan. 9, 2024

Abstract Passivating the electronic defects of metal halide perovskite is regarded as an effective way to improve power conversion efficiency (PCE) solar cells (PVSCs). Here, a series dipeptide molecules with abundant ─C═O, ─O─ and ─NH functional groups passivators for films are employed. These utilized treat surface prototype methyl ammonium lead iodide (MAPbI 3 ) corresponding PVSCs exhibit enhanced photovoltaic performance ambient stability, which can be ascribed to: 1) ─C═O interact undercoordinated Pb 2+ ions form hydrogen bonds I − ions, passivating in film reducing charge recombination PVSCs; 2) long alkyl chain increases hydrophobicity thus enhance stability PVSCs. The passivated MAPbI ‐based champion PCE 20.3% retain 60% initial after 1000 h. It believed that passivation engineering using polypeptide moleculars applied other compositions high device stability.

Language: Английский

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