Defects of Metal Halide Perovskites in Photocatalytic Energy Conversion: Friend or Foe?

Advanced Science, Journal Year: 2024, Volume and Issue: 11(29)

Published: June 3, 2024

Abstract Photocatalytic solar‐to‐fuel conversion over metal halide perovskites (MHPs) has recently attracted much attention, while the roles of defects in MHPs are still under debate. Specifically, mainstream viewpoint is that detrimental to photocatalytic performance, some recent studies show certain types contribute photoactivity enhancement. However, a systematic summary why it contradictory and how affect performance lacking. In this review, innovative MHP photocatalysts highlighted. First, origins elaborated, followed by clarifying benefits including optical absorption, charge dynamics, surface reaction. Afterward, progress on defect‐related photocatalysis, i.e., CO 2 reduction, H generation, pollutant degradation, organic synthesis systematically discussed critically appraised, putting emphasis their beneficial effects. With offering peculiar sets merits demerits, personal opinion ongoing challenges concluded outlining potentially promising opportunities for engineering photocatalysts. This critical review anticipated offer better understanding spur inspiration designing efficient

Language: Английский

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Surface and Defect Engineering Coupling of Charge Shuttle and Redox Site in Cs₃Bi₂Br₉/g-C₃N₄ for Efficient Photocatalytic C(sp³)–H Bond Activation

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 610 - 619

Published: Jan. 16, 2025

Solar-driven organic synthesis using halide perovskites (HPs) has garnered much attention, but their unsatisfactory conversion efficiency limits further applications. Addressing charge dynamics and redox site issues is a straightforward approach to improving performance. Herein, we report the synergistic separation active modulation in lead-free Cs3Bi2Br9 HP N-vacancy reticular g-C3N4 nanosheet for selective C(sp3)–H bond activation. This regulation exhibits strong interfacial interaction, enabling effective transfer with more sites. Theoretical calculations experimental characterizations detailed enhanced reduced energy barriers surface photoredox reactions. When applied toluene oxidation under simulated solar light, optimized photocatalyst achieves total rate of 6865.3 μmol g–1 h–1 an outstanding benzaldehyde selectivity over 92%, outperforming most reported HP-based photocatalysts. work offers universal strategy developing efficient photocatalysts solar-to-chemical conversion.

Language: Английский

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Precisely Modulating Oxygen Vacancies Via Heterovalent Ions Substitution in Spinel‐Structured Phosphor for Versatile Applications

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Rare‐earth ions doped phosphors have attracted great research interests owing to their versatile applications in optoelectronic fields. The often created atom vacancies because of the heterovalent substitution and different ion radii. However, how previously modulate defect concentration position phosphor is still a challenge significantly important for facilitating optical applications. Herein, accurate modulation oxygen spinel‐like ZnGa 2 O 4 demonstrated via Eu 3+ doping advanced temperature sensing information encryption experimental results first‐principle calculations confirmed that more introduced into lattice can lead generation high as well much deeper wider deficient states its electronic bandgap, which therefore endow potential afterglow emission. distinct luminescence quenching between at temperatures verified outstanding intensity ratio modeled performance with maximum relative sensitivity ( S r ) value 5.96% K −1 (@360 K) :0.02Eu sample. Moreover, by virtue fantastic thermal‐induced luminescence, dynamic optimal anti‐counterfeiting over :Eu been also achieved.

Language: Английский

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Strain Relaxation via Lattice Matching Effect for Highly Efficiency Stable Perovskite Solar Cells

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

Published: April 14, 2025

Abstract The residual strain and crystallographic defects in perovskite films pose significant challenges to improving the efficiency stability of solar cells (PSCs). To address these issues, 3,5‐difluorobenzenesulfonamide (DBF) is introduced as a powerful additive. spacing functional groups DBF molecules precisely comparable bond lengths angles lattice, structural feature originating from geometric compatibility between its benzene ring substituents [PbI 6 ] octahedral framework structure. This atomic‐scale matching effectively minimizes lattice mismatch, enabling release passivate film. spontaneous interaction PbI 2 slows down crystal growth, film quality. size‐matching effect with strong interactions F···MA⁺ (FA⁺) hydrogen bonds ─S═O (─NH )···Pb ⁺ coordination defects. As result, DBF‐modified PSCs achieve champion 25.18%. More importantly, devices demonstrate excellent environmental stability, retaining 97.71% their initial power conversion (PCE) after 1600 h an atmospheric environment (25 °C, 20% RH) without encapsulation. study provides simple effective strategy enhance photovoltaics.

Language: Английский

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A closer look at the interface of Cs3Bi2Br9 lead free perovskite in photocatalytic process

Journal of Physics and Chemistry of Solids, Journal Year: 2024, Volume and Issue: unknown, P. 112534 - 112534

Published: Dec. 1, 2024

Language: Английский

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