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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Co‐Self‐Assembled Monolayers Modified NiO_x for Stable Inverted Perovskite Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 11, 2024

Abstract [4‐(3,6‐dimethyl‐9H‐carbazol‐9yl)butyl]phosphonic acid (Me‐4PACz) self‐assembled molecules (SAM) are an effective method to solve the problem of buried interface NiO x in inverted perovskite solar cells (PSCs). However, Me‐4PACz end group (carbazole core) cannot forcefully passivate defects at bottom film. Here, a Co‐SAM strategy is employed modify PSCs. doped with phosphorylcholine chloride (PC) form improve monolayer coverage and reduce leakage current. The phosphate ions (Cl − ) PC can inhibit surface defects. Meantime, quaternary ammonium Cl fill organic cations halogen vacancies film enable passivation. Moreover, promote growth crystals, collaboratively defects, suppress nonradiative recombination, accelerate carrier transmission, relieve residual stress Consequently, modified devices show power conversion efficiencies as high 25.09% well excellent device stability 93% initial efficiency after 1000 h operation under one‐sun illumination. This work demonstrates novel approach for enhancing performance PSCs by modifying on .

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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Surface Energy Engineering of Buried Interface for Highly Stable Perovskite Solar Cells with Efficiency Over 25%

Advanced Materials, Год журнала: 2023, Номер 36(2)

Опубликована: Окт. 21, 2023

The abundant oxygen-related defects (e.g., O vacancies, O-H) in the TiO

Язык: Английский

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Amphoteric Ion Bridged Buried Interface for Efficient and Stable Inverted Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(1)

Опубликована: Ноя. 15, 2023

Abstract Synergistic morphology and defects management at the buried perovskite interface are challenging but crucial for further improvement of inverted solar cells (PerSCs). Herein, an amphoteric organic salt, 2‐(4‐fluorophenyl)ethylammonium‐4‐methyl benzenesulfonate (4FPEAPSA), is designed to optimize film energy level alignment interface. 4FPEAPSA treatment promotes growth a void‐free, coarse‐grained, hydrophobic by inducing crystal orientation. Besides, dual‐functional can chemically interact with film, passivate iodine formamidine vacancies, tending revert fermi its defect‐free state. Meanwhile, formation p‐type doping facilitate interfacial charge extraction transport PerSCs reduced carrier recombination loss. Consequently, improves efficiency devices 25.03% better storage, heat, humidity stability. This work contributes strengthening systematic understanding interface, providing synergetic approach realize precise control, effective defect suppression, efficient PerSCs.

Язык: Английский

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Highly‐Stable CsPbI₃ Perovskite Solar Cells with an Efficiency of 21.11% via Fluorinated 4‐Amino‐Benzoate Cesium Bifacial Passivation

Advanced Functional Materials, Год журнала: 2023, Номер 33(44)

Опубликована: Июль 7, 2023

Abstract The poor interface quality between cesium lead triiodide (CsPbI 3 ) perovskite and the electron transport layer limits stability efficiency of CsPbI solar cells (PSCs). Herein, a 4‐amino‐2,3,5,6‐tetrafluorobenzoate (ATFC) is designed as bifacial defect passivator to tailor perovskite/TiO 2 interface. comprehensive experiments demonstrate that ATFC can not only optimize conductivity, mobility, energy band structure TiO by passivation undercoordinated Ti 4+ , oxygen vacancy ( V O ), free OH defects but also promote yield high‐quality film synergistic Pb 2+ with CO group F atom, limiting I − migration via F···I interaction. Benefiting from above interactions, ATFC‐modified device yields champion power conversion (PCE) 21.11% an excellent open‐circuit voltage OC 1.24 V. Meanwhile, optimized PSC maintains 92.74% its initial after aging 800 h in air atmosphere, has almost no attenuation tracking at maximum point for 350 h.

Язык: Английский

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Dual‐Interface Modulation with Covalent Organic Framework Enables Efficient and Durable Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 35(38)

Опубликована: Июль 1, 2023

Dual-interface modulation including buried interface as well the top surface has recently been proven to be crucial for obtaining high photovoltaic performance in lead halide perovskite solar cells (PSCs). Herein, first time, strategy of using functional covalent organic frameworks (COFs), namely HS-COFs dual-interface modulation, is reported further understand its intrinsic mechanisms optimizing bottom and surfaces. Specifically, layer can enhance resistance against ultraviolet radiation, more importantly, release tensile strain, which beneficial enhancing device stability improving order crystal growth. Furthermore, detailed characterization results reveal that on effectively passivate defects suppress non-radiation recombination, optimize crystallization growth film. Benefiting from synergistic effects, modified devices deliver champion efficiencies 24.26% 21.30% 0.0725 cm2 1 -sized devices, respectively. Moreover, they retain 88% 84% their initial after aging 2000 h under ambient conditions (25 °C, relative humidity: 35-45%) a nitrogen atmosphere with heating at 65

Язык: Английский

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High‐Efficiency Perovskite Solar Cells with Improved Interfacial Charge Extraction by Bridging Molecules

Advanced Materials, Год журнала: 2024, Номер 36(38)

Опубликована: Июль 26, 2024

The interface between the perovskite layer and electron transporting is a critical determinate for performance stability of solar cells (PSCs). heterogeneity critically affects carrier dynamics at buried interface. To address this, bridging molecule, (2-aminoethyl)phosphonic acid (AEP), introduced modification SnO

Язык: Английский

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Glycol Monomethyl Ether‐Substituted Carbazolyl Hole‐Transporting Material for Stable Inverted Perovskite Solar Cells with Efficiency of 25.52%

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(33)

Опубликована: Апрель 30, 2024

Abstract Organic self‐assembled molecules (OSAMs) based hole‐transporting materials play a pivotal role in achieving highly efficient and stable inverted perovskite solar cells (IPSCs). However, the reported carbazol‐based OSAMs have serious drawbacks, such as poor wettability for solution spreading due to nonpolar surface, worse matched energy arrangement with perovskite, limited molecular species, which greatly limit device performance. To address above problems, novel OSAM [4‐(3,6‐glycol monomethyl ether‐9H‐carbazol‐9‐yl) butyl]phosphonic acid (GM‐4PACz) was synthesized material by introducing glycol ether (GM) side chains at carbazolyl unit. GM groups enhance surface of Indium Tin Oxide (ITO)/SAM substrate facilitate nucleation growth up film, suppress cation defects, release residual stress SAM/perovskite interface, evaluate level matching perovskite. Consequently, GM‐4PACz IPSC achieves champion PCE 25.52 %, respectable open‐circuit voltage ( V OC ) 1.21 V, high stability, possessing 93.29 % 91.75 their initial efficiency after aging air 2000 h or tracking maximum power point 1000 h, respectively.

Язык: Английский

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Perovskite solar cells with high-efficiency exceeding 25%: A review

Energy Materials and Devices, Год журнала: 2024, Номер 2(1), С. 9370018 - 9370018

Опубликована: Фев. 2, 2024

Metal halide perovskite solar cells (PSCs) are one of the most promising photovoltaic devices. Over time, many strategies have been adopted to improve PSC efficiency, and certified efficiency has reached 26.1%. However, only a few research groups fabricated PSCs with an >25%, indicating that achieving this remains uncommon. To develop industry, outstanding talent must be reserved latest technologies. Herein, we summarize recent developments in high-efficiency (>25%) highlight their effective crystal regulation, interface passivation, component layer structural design. Finally, propose perspectives based on current further enhance promote commercialization process PSCs.

Язык: Английский

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