Optical and Quantum Electronics, Journal Year: 2024, Volume and Issue: 56(8)
Published: July 18, 2024
Language: Английский
Small, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 29, 2025
Abstract Using first‐principles G 0 W (G is one‐electron Green’s function and the dynamical screening Coloumb potential) coupled Bethe–Salpeter equation (BSE) calculations with spin‐orbit coupling, exceptionally strong excitonic effects are identified in several bismuth‐based vacancy‐ordered mixed halide double perovskites. These perovskites thermodynamically stable negative formation energy. For Cs 3 Bi 2 X 9 (X = Cl,Br,I) perovskites, both bandgap binding energy decrease as size of halogen atom increases. The can be tuned such I 6 Cl , Br . This study reports exciton radiative lifetimes revealing that these excitons exhibit long lifetimes, particularly for 11141 at 300 K 24 5 K. linked to delocalization (Wannier–Mott type) real space, whereas more localized (Frenkel results shorter 155 334 ns Due their lifetime, materials present interesting opportunities photovoltaic applications.
Language: Английский
Citations
1
ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(23), P. 28158 - 28165
Published: June 1, 2023
Photodetectors (PDs) composed of lead-free metal halide perovskites have been a shining topic in optoelectronics. However, it is debatable whether are an n-type or p-type semiconductor with direct indirect band gap. Furthermore, to date, little research has conducted on color-sensing abilities. Herein, for the first time, single-crystal MA3Bi2I3xBr9-3x (x = 0, 1, 2, and 3) were systematically studied, results showed that MA3Bi2I9 direct-band-gap semiconductor, whereas MA3Bi2Br9 indirect-band-gap semiconductor. gap can be tuned from 2.06 2.55 eV, affording abilities 450 580 nm, respectively. The representative Au-MA3Bi2I9-ITO (ITO indium tin oxide) PD exhibits superior self-powered photodetecting performance high responsivity (15.8 mA W-1; 1.0 mW cm-2), detectivity (8.1 × 1011 Jones), on/off ratio (4231), LDR (72.5 dB) fast response speed (rise time 2 μs decay 29 μs). This study not only facilitates theoretical understanding perovskite materials but also sheds light application object interaction color perception.
Language: Английский
Citations
22
Energies, Journal Year: 2023, Volume and Issue: 16(5), P. 2328 - 2328
Published: Feb. 28, 2023
The lead halide-based perovskite solar cells have attracted much attention in the photovoltaic industry due to their high efficiency, easy manufacturing, lightweight, and low cost. However, these are not manufactured commercially lead-based toxicity. To investigate lead-free inorganic (PSCs), we investigated a novel Cs3Bi2I9-based configuration SCAPS-1D software using different hole transport layers (HTLs). At same time, WS2 is applied as an electron layer (ETL). Comparative analysis of various design configurations reveals that ITO/WS2/Cs3Bi2I9/PEDOT:PSS/Au offers best performance with 20.12% power conversion efficiency (PCE). After optimizing thickness, bandgap, defect density, carrier increased from 20.12 24.91%. Improvement other parameters such short circuit current (17.325 mA/cm2), open voltage (1.5683 V), fill factor (91.66%) also observed after tuning attributes. This investigation indicates potential application Cs3Bi2I9 stable material can contribute improving renewable energy sector.
Language: Английский
Citations
20
Nano Research, Journal Year: 2023, Volume and Issue: 17(4), P. 2960 - 2970
Published: Sept. 18, 2023
Language: Английский
Citations
18
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)
Published: May 10, 2024
Abstract Silver‐bismuth‐based perovskite‐inspired materials (PIMs) are increasingly being explored as non‐toxic in photovoltaic applications. However, many of these exhibit an ultrafast localization photogenerated charge carriers that is detrimental for charge‐carrier extraction. In this work, such processes thermally evaporated thin films compositions lying along the (AgI) x (BiI 3 ) y series, namely BiI , AgBi 2 I 7 AgBiI 4 Ag 5 6 and AgI, to investigate impact changing + /Bi 3+ content. A persistent presence all mixed together with unusually broad photoluminescence spectra, reveal eliminating silver will not suppress emergence a localized state. weak change electronic bandgap mobility reveals resilience band structure upon modifications composition mixed‐metal rudorffites. Instead, chemical impacts dynamics indirectly via structural alterations: Ag‐deficient demonstrate stronger most likely because higher density vacant sites cationic sublattice imparts enhanced lattice softness. Unraveling delicate interplay between composition, crystal structure, rudorffites provides crucial insights developing material‐by‐design approach quest highly efficient Bi‐based PIMs.
Language: Английский
Citations
8
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 357, P. 124318 - 124318
Published: June 18, 2024
Lead-free perovskites have attracted considerable attention in photocatalytic hydrogen evolution due to their better moisture stability and lower toxicity than those of lead-based analogues. However, activity remains low needs be improved for practical applications. Properly engineered heterojunction photocatalysts can provide more active sites stimulate efficient charge transfer. In this study, 1 T′/2 H−MoS2 nanoflowers were synthesized coupled with tri(dimethylammonium) hexaiodobismuthate (DMA3BiI6) form heterojunctions using a simple heating−cooling process. The H−MoS2/DMA3BiI6 composites exhibit excellent hydroiodic acid splitting under visible-light irradiation up rate 241.5 µmol g⁻1 h⁻1 apparent quantum efficiency 11.2 % at 420 nm. Furthermore, retained long-term performance after 3 days (12 cycles) repeated reaction (HER) measurements was observed. Experimental DFT studies indicate that the HER introduction on DMA3BiI6 is transfer separation interfaces composite. Accordingly, our work highlights new potentially viable strategy construct lead-free halide perovskite-based heterostructures HER.
Language: Английский
Citations
7
Materials Today Communications, Journal Year: 2024, Volume and Issue: 40, P. 109449 - 109449
Published: June 4, 2024
Language: Английский
Citations
6
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)
Published: July 8, 2024
Abstract High‐sensitivity wearable radiation detectors are essential for personnel protection in environments such as defense, nuclear facilities, and medical fields. Traditional using bulk crystals lack flexibility, emerging perovskite films suffer from lead toxicity poor charge transport. Herein, lead‐free photoferroelectric hybrid metal halide flexible membranes presented, offering superior X‐ray response with sensitivities up to 7872 ± 517 µC Gy air −1 cm −2 at 50 V bias 394 67 a self‐driven mode, detection limit of lower than 77 nGy s , excellent imaging capabilities. This exceptional performance is attributed the spontaneous polarization that promotes efficient Additionally, they show remarkable stability, long‐term mechanical fatigue resistance, water stability. They also exhibit energy under Compton effect meet angle requirements International Electrotechnical Commission standard direct‐reading personal dose equivalent meters, paving way their integration into flexible, dosimeters. These advancements have potential drive realization next generation detectors.
Language: Английский
Citations
6
Nanomaterials, Journal Year: 2024, Volume and Issue: 14(23), P. 1867 - 1867
Published: Nov. 21, 2024
This article reviews the latest advancements in perovskite solar cell (PSC) components for innovative photovoltaic applications. Perovskite materials have emerged as promising candidates next-generation cells due to their exceptional light-absorbing capabilities and facile fabrication processes. However, limitations stability, scalability, efficiency hindered widespread adoption. review systematically explores recent breakthroughs PSC components, focusing on absorbed layer engineering, electron hole transport layers, interface materials. In particular, it discusses novel compositions, crystal structures, manufacturing techniques that enhance stability scalability. Additionally, evaluates strategies improve charge carrier mobility, reduce recombination, address environmental considerations. Emphasis is placed scalable methods suitable large-scale integration into existing infrastructure. comprehensive thus provides researchers, engineers, policymakers with key information needed motivate further required transformative of PSCs global energy production.
Language: Английский
Citations
6
Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(42), P. 22656 - 22687
Published: Jan. 1, 2023
This review summarizes recent approaches for stabilizing metal halide perovskites in water, including surface engineering, common-ion effect, and intrinsic water stability as well their photocatalytic applications.
Language: Английский
Citations
15