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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Regulation of Buried Interface through the Rapid Removal of PbI₂·DMSO Complex for Enhancing Light Stability of Perovskite Solar Cells

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(6), P. 2659 - 2669

Published: May 10, 2024

The presence of the detrimental PbI2 residue at buried interface negatively affects photovoltaic performance perovskite solar cells (PSCs). However, underlying mechanism involved in formation and elimination residual has been rarely investigated, despite its critical significance for high-efficiency stable PSCs. Here, we investigated influenced by citric acid (CA) found that CA can quickly remove PbI2·DMSO complex through a competitive adsorption forming highly crystallized PbI2. This promotes subsequent intercalation amine cations into framework perovskite. Consequently, best-performing target PSC achieves an efficiency 25.19% (a certified 24.64%) 23% from 1 cm2 PSC. Additionally, also demonstrates improved light stability after 200 h UV soaking maintaining 94.21% initial compared with only 70.76% control

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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Efficient Perovskite Photovoltaics by a Nanostructured Ga₂O₃ Hole-Blocking Layer

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(7), P. 6387 - 6396

Published: March 21, 2024

This research uses the SCAPS-1D simulation program to methodically enhance and numerically analyze perovskite solar cells that utilize a gallium oxide (Ga2O3) hole-blocking layer. To corroborate our calculations, we initially compared current density–voltage properties (J–V) obtained from SCAPS model experimental results. Remarkably, curve exhibited almost excellent alignment, exhibiting precision reliability of analytical approach. We simulated typical (n-i-p) architecture carefully investigated performance various parameters for electron transport layer perovskite. optimized thicknesses Ga2O3, doping concentration defect density, interface-trapped defects, series resistance, shunt resistance. Through calculation, successfully developed an efficient photovoltaic with structure FTO/Ga2O3/MAPbI3/spiro-OMeTAD/Au, yielding champion 28.19%. modeling is beneficial understanding operational principles MAPbI3 photovoltaics. It also plays crucial role in directing fabrication high-performance devices under laboratory conditions.

Language: Английский

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A Universal Ternary Solvent System of Surface Passivator Enables Perovskite Solar Cells with Efficiency Exceeding 26%

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

Published: Oct. 25, 2024

Abstract Surface passivation is a vital approach to improve the photovoltaic performance of perovskite solar cells (PSCs), in which passivator solvent an inevitable but easy‐ignored factor on effects. Herein, universal ternary system surface passivators proposed through comprehensively considering solubility and selective dissolution maximize effect. Tetrahydrothiophene 1‐oxide (THTO) selected as promoter by comparing binding energy with ability distort lattice among various aprotic polar molecules, can facilitate passivator's reaction achieve sufficient surface. Besides, chlorobenzene (CB) used diluting agent minimize amount isopropanol (IPA), inhibiting additional solvent‐induced defects. As result, planar PSCs power conversion efficiency (PCE) 26.05%, (certificated 25.66%). unencapsulated devices exhibit enhanced stability, maintain 95.23% 95.68% their initial PCE after 2000 h storage ambient air 800 light‐soaking N 2 ‐glovebox. Moreover, this also exhibits well applicability reliability different such PEAI, BAI, so on.

Language: Английский

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Influence of Donor Skeleton on Intramolecular Electron Transfer Amount for Efficient Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(32)

Published: May 16, 2024

Abstract The passivation of the defects derived from rapid‐crystallization with electron‐donating molecules is always a prerequisite to obtain desirable perovskite films for efficient and stable solar cells, thus, in‐depth understanding on correlations between molecular structure capacity great importance screening passivators. Here, we introduce double‐ended amide molecule into precursor solution modulate crystallization process passivate defects. By regulating intermediate bridging skeletons alkyl, alkenyl benzene groups, results show strength highly depends spin‐state electronic that serves as an intrinsic descriptor determine intramolecular charge distribution by controlling orbital electron transfer donor segment acceptor segment. Upon careful optimization, benzene‐bridged demonstrates superior efficacy improving film quality. As physical proof‐of‐concept, carbon‐based, all‐inorganic CsPbI 2 Br cell delivers significantly increased efficiency 15.51 % remarkably improved stability. Based same principle, champion 24.20 further obtained inverted (Cs 0.05 MA FA 0.9 )Pb(I 0.93 0.07 ) 3 cell. These findings provide new fundamental insights influence modulation effective cells.

Language: Английский

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Constructing orderly crystal orientation with a bidirectional coordinator for high efficiency and stable perovskite solar cells

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(16), P. 6003 - 6012

Published: Jan. 1, 2024

The trifluoroacetate pseudohalide anion, with dual functionalities, is introduced at the buried interface to promote orderly growth. This results in a power conversion efficiency of 25.60% and long-term stability under light exposure.

Language: Английский

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Light‐Driven Dynamic Defect‐Passivation for Efficient Inorganic Perovskite Solar Cells

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

Published: Nov. 20, 2024

Abstract Due to its soft lattice characteristics, all‐inorganic cesium lead halide (CsPbI 3‐x Br x ) perovskite is vulnerable external environmental stress such as moisture, polar solvent, illumination. resulting in structural defects (V I , i etc.) and ion mobility. However, most of the prior arts focus on short‐term static passivation, which has a negligible effect formed during solar cell operation. Herein, photoisomerizable molecule, 1,3,3‐trimethylindolino‐8′‐methoxybenzopyrylospiran (OMe‐SP), exhibiting light‐driven pre‐isomeric (SP) post‐isomeric (PMC) configurations, employed an interfacial protective layer top CsPbI . The present strategy not only effectively suppresses migration halogen ions, but also enables sustainable passivation defects, thereby significantly reducing charge recombination retarding degradation. Consequently, OMe‐SP‐modified cells (PSCs) exhibit superior stability, maintaining 91% their initial efficiency after aging 1032 h under maximum power point (MPP) tracking continuous one sun Meanwhile, achieves impressive conversion 22.20%, stands highest among cells. Overall, implementation this robust provides defect suppression for achieving both high PCE stable inorganic perovskite.

Language: Английский

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In situ Crosslinked Robust Molecular Zipper at the Buried Interface for Perovskite Photovoltaics

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

Published: Feb. 16, 2025

Abstract The brittle buried interface, characterized by weak adhesion to the substrate, numerous imperfections, and unfavorable strain, poses a significant challenge that impairs overall performance long‐term stability of perovskite solar cells (PSCs). Herein, robust molecular zipper is constructed through in situ polymerization self‐assembly monomer 4‐vinylbenzoic acid (VA), tightly link interface substrate n‐i‐p PSCs with an adhesive strength as high 10.77 MPa. modified exhibits improved morphology, suppressed defects, released matched energy level alignment. resulting deliver absolute gain ≥1.67% champion power conversion efficiency based on both one‐step deposition protocol two‐step one, demonstrating universality this strategy across different film‐processing scenarios. unencapsulated can retain 94.2% their initial after 550 h linear extrapolated T 90 value 1230 h, per ISOS‐L‐2 protocol. This work provides facile reinforce PSCs.

Language: Английский

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Work Function Tuning of Carbon Electrode to Boost the Charge Extraction in Hole Transport Layer‐Free Perovskite Solar Cells

Small, Journal Year: 2024, Volume and Issue: unknown

Published: May 14, 2024

Abstract Perovskite solar cell (PSC) is a promising photovoltaic technology that achieves over 26% power conversion efficiency (PCE). However, the high materials costs, complicated fabrication process, as well poor long‐term stability, are stumbling blocks for commercialization of PSCs in normal structures. The hole transport layer (HTL)‐free carbon‐based (C‐PSCs) expected to overcome these challenges. C‐PSCs have suffered from relatively low PCE due severe energy loss at perovskite/carbon interface. Herein, study proposes boost extraction capability carbon electrode by incorporating functional manganese (II III) oxide (Mn 3 O 4 ). It found work function ( W F ) can be finely tuned with different amounts Mn addition, thus interfacial charge transfer maximized. Besides, mechanical properties also strengthened. Finally, 19.03% achieved. Moreover, device retains 90% its initial after 2000 h storage. This offers feasible strategy fabricating efficient paintable HTL‐free C‐PSCs.

Language: Английский

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