Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective

Advanced Functional Materials, Год журнала: 2023, Номер 34(6)

Опубликована: Окт. 27, 2023

Abstract Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, radiation detectors. The impressive optical optoelectronic properties, along with rapid increase efficiencies cells LEDs, greatly attracted researchers across many disciplines. However, most advances made so far terms preparation (colloidal nanocrystals films), devices highest are based on Pb‐based halide which raised concerns over their commercialization due to toxicity Pb. This has triggered search lower‐toxicity Pb‐free perovskites led significant progress last few years. In this roadmap review, different expertise joined together summarize latest progress, outstanding challenges, future directions perovskite regarding synthesis, spectroscopy, devices, guide currently working area well those that will join field future.

Язык: Английский

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Target Therapy for Buried Interface Enables Stable Perovskite Solar Cells with 25.05% Efficiency

Advanced Materials, Год журнала: 2023, Номер 35(39)

Опубликована: Июль 17, 2023

The buried interface in perovskite solar cells (PSCs) is pivotal for achieving high efficiency and stability. However, it challenging to study optimize the due its non-exposed feature. Here, a facile effective strategy developed modify SnO2 /perovskite by passivating defects modulating carrier dynamics via incorporating formamidine oxalate (FOA) nanoparticles. Both formamidinium ions show longitudinal gradient distribution layer, mainly accumulating at interface, which enables high-quality upper films, minimized defects, superior contacts, matched energy levels between . Significantly, FOA can simultaneously reduce oxygen vacancies tin interstitial on surface FA+ /Pb2+ associated interface. Consequently, treatment significantly improves of PSCs from 22.40% 25.05% their storage- photo-stability. This method provides an target therapy achieve very

Язык: Английский

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Molecular Bridge on Buried Interface for Efficient and Stable Perovskite Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(34)

Опубликована: Июнь 26, 2023

Abstract The interface of perovskite solar cells (PSCs) is significantly important for charge transfer and device stability, while the buried with impact on film growth has been paid less attention. Herein, we use a molecular modifier, glycocyamine (GDA) to build bridge SnO 2 /perovskite, resulting in superior interfacial contact. This achieved through strongly interaction between GDA , which also appreciably modulates energy level. Moreover, can regulate crystal growth, yielding enlarged grain size absence pinholes, exhibiting substantially reduced defect density. Consequently, PSCs modification demonstrate significant improvement open circuit voltage (close 1.2 V) fill factor, leading an improved power conversion efficiency from 22.60 % 24.70 %. Additionally, stabilities devices under maximum point 85 °C heat both perform better than control devices.

Язык: Английский

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All-perovskite-based unassisted photoelectrochemical water splitting system for efficient, stable and scalable solar hydrogen production

Nature Energy, Год журнала: 2024, Номер 9(3), С. 272 - 284

Опубликована: Янв. 23, 2024

Язык: Английский

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A crystal capping layer for formation of black-phase FAPbI ₃ perovskite in humid air

Science, Год журнала: 2024, Номер 385(6705), С. 161 - 167

Опубликована: Июль 11, 2024

Black-phase formamidinium lead iodide (α-FAPbI 3 ) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI . We show that classic solvent system perovskite fabrication exacerbates this reproducibility challenge. The conventional coordinative dimethyl sulfoxide (DMSO) promoted under high relative humidity (RH) conditions because its hygroscopic nature. introduced chlorine-containing organic molecules to form a capping layer blocked moisture penetration while preserving DMSO-based complexes regulate crystal growth. report power conversion efficiencies >24.5% solar cells fabricated across an RH range 20 60%, and 23.4% at 80% RH. unencapsulated device retained 96% initial performance in air (with 40 60% RH) after 500-hour maximum point operation.

Язык: Английский

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Facet-Dependent Passivation for Efficient Perovskite Solar Cells

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(44), С. 24349 - 24357

Опубликована: Окт. 26, 2023

Understanding the interplay between surface structure and passivation materials their effects associated with modification is of fundamental importance; however, it remains an unsolved problem in perovskite field. Here, we report a principle for efficient solar cells via facet-dependent phenomenon. The process selectively occurs on facets, which observed various post-treatment different functionality, atomic arrangements facets determine alignments layers. profound understanding leads to finding 2-amidinopyridine hydroiodide as material uniform effective both (100) (111) facets. Consequently, achieved efficiency 25.10% enhanced stability. concept can provide important clue unidentified principles novel means enhance performance stability perovskite-based devices.

Язык: Английский

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Chiral-structured heterointerfaces enable durable perovskite solar cells

Science, Год журнала: 2024, Номер 384(6698), С. 878 - 884

Опубликована: Май 23, 2024

Mechanical failure and chemical degradation of device heterointerfaces can strongly influence the long-term stability perovskite solar cells (PSCs) under thermal cycling damp heat conditions. We report chirality-mediated interfaces based on

Язык: Английский

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Enhanced Electron Delocalization within Coherent Nano‐Heterocrystal Ensembles for Optimizing Polysulfide Conversion in High‐Energy‐Density Li‐S Batteries

Advanced Materials, Год журнала: 2023, Номер 36(13)

Опубликована: Дек. 25, 2023

Abstract Commercialization of high energy density Lithium‐Sulfur (Li‐S) batteries is impeded by challenges such as polysulfide shuttling, sluggish reaction kinetics, and limited Li + transport. Herein, a jigsaw‐inspired catalyst design strategy that involves in situ assembly coherent nano‐heterocrystal ensembles (CNEs) to stabilize high‐activity crystal facets, enhance electron delocalization, reduce associated barriers proposed. On the surface, stabilized facets induce aggregation. Simultaneously, surrounded surface with enhanced activity promote 2 S deposition diffusion, synergistically facilitating continuous efficient sulfur redox. Experimental DFT computations results reveal dual‐component hetero‐facet alters coordination Nb atoms, enabling redistribution 3D orbital electrons at center promoting d‐p hybridization sulfur. The CNE, based on level gradient lattice matching, endows maximum transfer catalysts establishes smooth pathways for ion diffusion. Encouragingly, NbN‐NbC‐based pouch battery delivers Weight 357 Wh kg −1 , thereby demonstrating practical application value CNEs. This work unveils novel paradigm designing high‐performance catalysts, which has potential shape future research electrocatalysts storage applications.

Язык: Английский

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Strategies for Improving Efficiency and Stability of Inverted Perovskite Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(37)

Опубликована: Март 1, 2024

Abstract Perovskite solar cells (PSCs) have attracted widespread research and commercialization attention because of their high power conversion efficiency (PCE) low fabrication cost. The long‐term stability PSCs should satisfy industrial requirements for photovoltaic devices. Inverted with a p‐i‐n architecture exhibit considerable advantages excellent competitive efficiency. continuously broken‐through PCE inverted shows huge application potential. This review summarizes the developments outlines characteristics including charge transport layers (CTLs), perovskite compositions, interfacial regulation strategies. latest effective CTLs, modification, promotion strategies especially under light, thermal, bias conditions are emphatically analyzed. Furthermore, applications structure in high‐efficiency stable tandem, flexible devices, modules main obstacles systematically introduced. Finally, remaining challenges faced by devices discussed, several directions advancing proposed according to development status industrialization requirements.

Язык: Английский

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Bandgap-universal passivation enables stable perovskite solar cells with low photovoltage loss

Science, Год журнала: 2024, Номер 384(6697), С. 767 - 775

Опубликована: Май 16, 2024

The efficiency and longevity of metal-halide perovskite solar cells are typically dictated by nonradiative defect-mediated charge recombination. In this work, we demonstrate a vapor-based amino-silane passivation that reduces photovoltage deficits to around 100 millivolts (>90% the thermodynamic limit) in bandgaps between 1.6 1.8 electron volts, which is crucial for tandem applications. A primary-, secondary-, or tertiary-amino-silane alone negatively barely affected crystallinity transport, but amino-silanes incorporate primary secondary amines yield up 60-fold increase photoluminescence quantum preserve long-range conduction. Amino-silane-treated devices retained 95% power conversion more than 1500 hours under full-spectrum sunlight at 85°C open-circuit conditions ambient air with relative humidity 50 60%.

Язык: Английский

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