Multifunctional entinostat enhances the mechanical robustness and efficiency of flexible perovskite solar cells and minimodules

Nature Photonics, Journal Year: 2024, Volume and Issue: 18(4), P. 379 - 387

Published: Jan. 18, 2024

Language: Английский

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Phosphonate Diacid Molecule Induced Crystallization Manipulation and Defect Passivation for High‐Performance Inverted MA‐Free Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 18, 2024

Abstract Inverted perovskite solar cells (PSCs) comprising formamidinium‐cesium (FA‐Cs) lead triiodide have garnered considerable attention due to their impressive efficiency and remarkable stability. Nevertheless, synthesizing high‐quality FA‐Cs alloyed films presents challenges, primarily attributable the intricate interphase process involved absence of methylammonium (MA + ) mixed halogens. Here, additive 3‐phosphonopropanoic acid (3‐PPA) is introduced, with bifunctional phosphonic groups, into precursor modulate crystal growth provide passivation at grain boundaries. In situ characterization reveals that 3‐PPA can form a “rapid nucleation, slow growth” mechanism, resulting in enlarged grains enhanced crystallinity. addition, serves passivate boundary defects release residual strain by forming molecular bridging, leading passivated achieving fluorescence lifetime 5.79 microseconds favorable n‐type contact interface. As result, devices incorporating achieve champion power conversion (PCE) 24.05% an ultra‐high fill factor (FF) 84.22%. More importantly, optimized exhibit satisfactory stability under various testing conditions. The findings underscore pivotal role multifunctional additives crystallization control defect for high‐performance MA‐free pure iodine PSCs.

Language: Английский

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

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)

Published: July 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

Language: Английский

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Realizing Stable Perovskite Solar Cells with Efficiency Exceeding 25.6% Through Crystallization Kinetics and Spatial Orientation Regulation

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 19, 2024

Abstract Organic‐inorganic hybrid perovskites have emerged as highly promising candidates for photovoltaic applications, owing to the exceptional optoelectronic properties and low cost. Nonetheless, performance stability of solar cells suffer from defect states perovskite films aroused by non‐optically active phases non‐centralized crystal orientation. Herein, a versatile organic molecule, Hydantoin, modulate crystallization perovskite, is developed. Benefiting diverse functional groups, more spatially oriented with high crystallinity are formed. This enhancement accompanied conspicuous reduction in density, yielding efficiency 25.66% (certified 25.15%), superb environmental stability. Notably, under standard measurement conditions (ISOS‐L‐1I), maximum power point (MPP) output maintains 96.8% initial 1600 h exhibits excellent ion migration suppression. The synergistic regulation spatial orientation offers novel avenues propelling cell (PSC) development.

Language: Английский

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Near‐Stoichiometric and Homogenized Perovskite Films for Solar Cells with Minimized Performance Variation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(17)

Published: Feb. 22, 2023

Mixed-cation, small band-gap perovskites via rationally alloying formamidinium (FA) and methylammonium (MA) together have been widely employed for blade-coated perovskite solar cells with satisfied efficiencies. One of the stringent challenges lies in difficult control nucleation crystallization kinetics mixed ingredients. Herein, a pre-seeding strategy by mixing FAPbI3 solution pre-synthesized MAPbI3 microcrystals has developed to smartly decouple process. As result, time window initialized greatly extended 3 folds (i.e. from 5 s 20 s), which enables formation uniform homogeneous alloyed-FAMA films designated stoichiometric ratios. The resultant achieved champion efficiency 24.31 % accompanied outstanding reproducibility more than 87 devices showing efficiencies higher 23 %.

Language: Английский

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Hot‐Carrier Cooling Regulation for Mixed Sn‐Pb Perovskite Solar Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)

Published: Jan. 21, 2024

Abstract The rapid relaxation of hot carriers leads to energy loss in the form heat and consequently restricts theoretical efficiency single‐junction solar cells; However, this issue has not received much attention tin‐lead perovskites cells. Herein, tin(II) oxalate (SnC 2 O 4 ) is introduced into perovskite precursor solution regulate hot‐carrier cooling dynamics. addition SnC increases length carrier diffusion, extends lifetime carriers, simultaneously slows down rate carriers. Furthermore, can bond with uncoordinated Sn 2+ Pb ions crystallization enable large grains. strongly reducing properties C 2− inhibit oxidation 4+ minimize formation vacancies resulting films. Additionally, as a substitute for fluoride, introduction avoids transport issues caused by aggregation F – at interface. As result, ‐treated Sn‐Pb cells show champion 23.36%, well 27.56% all‐perovskite tandem Moreover, devices excellent long‐term stability. This finding expected pave way toward stable highly efficient

Language: Английский

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Synergistic Crystallization Kinetics Modulation and Deep/Shallow Level Defect Passivation via an Organometallic Cobaltocenium Salt Toward High‐Performance Inverted Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(8)

Published: Jan. 9, 2024

Abstract Numerous deep/shallow level defects generated at the surface/grain boundaries of perovskite during uncontrollable crystallization pose a formidable challenge to photovoltaic performance solar cells (PSCs). Herein, an organometallic cobaltocenium salt additive, 1‐propanol‐2‐(1,2,3‐triazol‐4‐yl) hexafluorophosphate (PTCoPF 6 ), is incorporated into precursor solution regulate and minimize holistic for high‐performance inverted PSCs. The cations PF − in PTCoPF stabilize Pb‐I framework repair shallow‐level positively negatively charged vacancies perovskite. N═N triazole ring can passivate deep‐level uncoordinated lead. interaction between materials delays nucleation crystal growth, ensuring high‐quality with large grains, suppressing non‐radiative recombination ion migration. Therefore, ‐incorporated PSC achieves impressive power conversion efficiency 25.03% outstanding long‐term stability. Unencapsulated encapsulated PSCs maintain 93% 95% their initial efficiencies under 85 °C storage nitrogen atmosphere 1000 h maximum point tracking nearly h, respectively. Synergistic kinetic modulation defect passivation ionized metal‐organic complex additives will become prevalent methods improve stability

Language: Английский

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Oriented Growth for Efficient and Scalable Perovskite Solar Cells by Vapor–Solid Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(21)

Published: Jan. 30, 2024

Abstract The precise control and understanding of crystal orientation in perovskite polycrystalline films are crucial for the development efficient stable devices. However, achieving this remains a significant challenge. Herein, PbI 2 oriented growth strategy is developed, combined with situ vapor–solid reaction transformations, to achieve full‐vacuum films. Grazing‐incidence wide‐angle X‐ray scattering (GIWAXS) analysis revealed general pattern vapor transformation two‐step process. resulting preferred has effectively reduced trap state density, optimizing carrier dynamics. As result, champion efficiencies 22.11% (0.148 cm ), 20.60% (1 19.41% (5 × 5 mini‐modules) achieved, which highest value based on reaction. Additionally, method applicable variety guide layers extended 30 film, demonstrating universality scalability method.

Language: Английский

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Inhibiting perovskite decomposition by a creeper-inspired strategy enables efficient and stable perovskite solar cells

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 18, 2024

Abstract The commercialization of perovskite solar cells is badly limited by stability, an issue determined mainly perovskite. Herein, inspired a natural creeper that can cover the walls through suckers, we adopt polyhexamethyleneguanidine hydrochloride as molecular on to inhibit its decomposition starting from annealing process. molecule possesses long-line structure where guanidinium groups serve suckers strongly anchor cations multiple hydrogen bonds. These features make grains and suppressing cations’ escape. resulting planar achieve efficiency 25.42% (certificated 25.36%). Moreover, film device exhibit enhanced stability even under harsh damp-heat conditions. devices maintain >96% their initial after 1300 hours operation 1-sun illumination 1000 storage 85% RH, respectively.

Language: Английский

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Tailored Multisite Rigid Conjugated Molecules to Anchor Perovskite for Comprehensive Management of Perovskite Crystallization and Defects

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

Published: Jan. 7, 2025

Abstract engineering has emerged as a promising approach to improve the stability and power conversion efficiency of perovskite solar cells (PSCs) by regulating crystallization or defects. Conventional methods typically focus on single functional group, leading deficiency in simultaneously addressing above mentioned two aspects. Here, an innovative using (methylsulfonyl)phenyl)prop‐2‐en‐1‐amine hydroiodide (MSPPAI) is presented concurrently effectively modulate defect passivation. The unique structure MSPPAI, combining rigid conjugated with multisite anchoring groups (─NH 2 ─SO ─), enables precise regulation through strong interaction components. This promotes preferred (100) orientation crystals, enhances grain size, thus improves film quality. Meanwhile, approximate coplanarity further facilitate ordered directional growth. Furthermore, preventing volatile loss coordinating residual Pb 2+ , MSPPAI could stabilize boundaries surfaces reduce defects prevent degradation. Utilizing these mechanisms, corresponding based devices achieves 25.54% exhibits excellent that maintains 93% its initial even after 1600 h under humid conditions. molecular design strategy presents novel for improving PSCs.

Language: Английский

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