Dipole Moments Regulation of Biphosphonic Acid Molecules for Self-assembled Monolayers Boosts the Efficiency of Organic Solar Cells Exceeding 19.7%

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(20), С. 14287 - 14296

Опубликована: Май 8, 2024

PEDOT:PSS has been widely used as a hole extraction layer (HEL) in organic solar cells (OSCs). However, their acidic nature can potentially corrode the indium tin oxide (ITO) electrode over time, leading to adverse effects on longevity of OSCs. Herein, we have developed class biphosphonic acid molecules with tunable dipole moments for self-assembled monolayers (SAMs), namely, 3-BPIC(i), 3-BPIC, and 3-BPIC-F, which exhibit an increasing moment sequence. Compared centrosymmetric axisymmetric 3-BPIC 3-BPIC-F higher adsorption energies (Eads) ITO, shorter interface spacing, more uniform coverage ITO surface, better interfacial compatibility active layer. Thanks incorporation fluorine atoms, exhibits deeper highest occupied molecular orbital (HOMO) energy level larger compared resulting enlarged work function (WF) ITO/3-BPIC-F substrate. These advantages could not only improve within device but also lower impedance reduce nonradiative recombination at interface. As result, OSCs using SAM based obtained record high efficiency 19.71%, is than that achieved from 3-BPIC(i) (13.54%) (19.34%). Importantly, 3-BPIC-F-based significantly enhanced stability utilizing HEL. Our offers guidance future design functional SAMs realize even performance cells.

Язык: 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, Год журнала: 2024, Номер 9(6), С. 2659 - 2669

Опубликована: Май 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

Язык: Английский

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Rationally designed universal passivator for high-performance single-junction and tandem perovskite solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 17, 2025

Interfacial trap-assisted nonradiative recombination hampers the development of metal halide perovskite solar cells (PSCs). Herein, we report a rationally designed universal passivator to realize highly efficient and stable single junction tandem PSCs. Multiple defects are simultaneously passivated by synergistic effect anion cation. Moreover, defect healing is precisely modulated carefully controlling number hydrogen atoms on cations steric hindrance. Due minimized interfacial energy loss, L-valine benzyl ester p-toluenesulfonate (VBETS) modified inverted PSCs deliver power conversion efficiency (PCE) 26.28% using vacuum flash processing technology. suppressing carrier recombination, large-area modules with an aperture area 32.144 cm2 perovskite/Si coupled VBETS passivation PCE 21.00% 30.98%, respectively. This work highlights critical role hindrance in designing molecular modulators advance stability

Язык: Английский

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Iodide Management and Oriented Crystallization Modulation for High‐Performance All‐Air Processed Perovskite Solar Cells

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 24, 2024

Abstract Halide‐related defects at the buried interface not only cause nonradiative recombination, but also seriously impair long‐term stability of perovskite solar cells (PSCs). Herein, a bottom‐up, all‐in‐one modification strategy is proposed by introducing multisite antioxidant ergothioneine (EGT) to manage iodide ions and manipulate crystallization dynamics. The findings demonstrate that EGT passivates uncoordinated Sn 4+ /Pb 2+ defects, firmly anchors inhibits their oxidation I 2 . Additionally, enhances oriented perovskite, improves carrier dynamics, releases residual stresses. Consequently, optimized all‐air processed device (Rb 0.02 (FA 0.95 Cs 0.05 ) 0.98 PbI 2.91 Br 0.03 Cl 0.06 achieves remarkable power conversion efficiency (PCE) 25.13%, which among highest values reported for devices fabricated in air, along with ultrahigh open‐circuit voltage ( V OC 1.191 fill factor (FF) 84.9%. without encapsulation exhibits strong humidity, thermal, operational under ISOS protocol. Specifically, initial retained 90.12% after 1512 h thermal ageing 65 °C 90.14% 930 continuous maximum point tracking (MPPT) simulated AM1.5 illumination.

Язык: Английский

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Dual functionality of charge extraction and interface passivation by self-assembled monolayers in perovskite solar cells

Energy & Environmental Science, Год журнала: 2024, Номер 17(19), С. 6974 - 7016

Опубликована: Янв. 1, 2024

This review overviews the challenges at buried interface of PSCs, defect passivation capabilities SAMs, and its effectiveness compared to other passivating agents.

Язык: Английский

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Manipulating the crystallization kinetics of halide perovskites for large-area solar modules

Communications Materials, Год журнала: 2024, Номер 5(1)

Опубликована: Июль 23, 2024

Abstract In the last decade, laboratory-scale single-junction perovskite solar cells have achieved a remarkable power conversion efficiency exceeding 26.1%. However, transition to industrial-scale production has unveiled significant gap. The central challenge lies in difficulty of achieving uniform, high-quality films on large scale. To tackle this issue, various innovative strategies for manipulating crystallization emerged recent years. Based an in-depth fundamental understanding nucleation and growth mechanisms large-area prepared through blade/slot-die coating methods, review offers critical examination manipulation modules. Lastly, we explore future avenues aimed at enhancing stability PSMs, thereby steering field toward commercially viable applications.

Язык: Английский

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Efficient Functional Compensation Layer Integrated with HTL for Improved Stability and Performance in Perovskite Solar Cells

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Improving the interface characteristics between hole-transport layer (HTL) and perovskite absorber is crucial for achieving maximum efficiency in inverted solar cells (PSCs). This paper presents an effective functional compensation (FCL) composed of benzothiophene derivatives, particularly 5-(trifluoromethyl)-1-benzothiophene-2-carboxylic acid (TFMBTA); this introduced MeO-2PACz HTL to improve interfacial them. FCL improves charge transfer, hole extraction, deposition by improving surface morphology optimizing energy level alignment. The groups TFMBTA effectively passivate defects. As a result, introduction markedly reduces non-radiative recombination at layer. MeO-2PACz-based PSCs with demonstrated impressive peak power conversion 23.85%, accompanied substantially enhanced open-circuit voltage (Voc), fill factor (FF), long-term stability. Similarly, introducing PEDOT:PSS both stability PSCs, demonstrating universality FCLs across different types HTLs.

Язык: Английский

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Decreased Hysteresis Benefited from Enhanced Lattice Oxygen and Promoted Band Alignment with Electron Transport Layer Modification in Perovskite Solar Cells

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 8, 2025

SnO2 electron transport layer (ETL) morphology plays a vital role in carrier transportation and the properties of perovskite solar cells (PSCs). However, uneven pore surface would inevitably lead to high interface defects, hysteresis, poor performance. In this work, we use molecular modifier 4-guanidinobenzoic acid methanesulfonate (GAMSA) build bridge on buried SnO2/perovskite. XPS results demonstrate that ratio lattice oxygen (OL)/adsorbed (OV) increased from 1.35 2.34 after GAMSA modification, thus, Sn4+ O vacancy defects were effectively reduced. Meanwhile, conduction band minimum ETL enhanced −4.33 eV −4.07 eV, which obviously facilitated transport. As result, optimal device exhibits an efficiency 22.42%, is much higher than control one 20.13%, with greatly decreased hysteresis index 14.35% 3.27%. Notably, optimized target demonstrated excellent long-term stability, maintaining initial 87% 2000 h storage N2 atmosphere dark at room temperature. This work paves new method modification improve restrain for performance PSCs.

Язык: Английский

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Ligand-Assisted Reprecipitation of Highly Luminescent Perovskite Nanocrystals

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Ligand-assisted reprecipitation (LARP) is a facile room-temperature synthesis method suitable for the mass production of perovskite nanocrystals (NCs). However, it encounters serious problems such as low product yields and poor quality. Here, polymer ligand (P-AMDL) designed synthesized composed four monomers 2-acrylamido-2-methylpropanesulfonic acid (A), methyl methacrylate (M), 2-(dimethylamino) ethyl (D), lauryl (L). Sulfonic groups, amide ester groups provide multiple binding sites P-AMDL, long alkyl chains can improve hydrophobicity redispersion ability. CsPbBr3 NCs high quality (PLQY > 90%) are by P-AMDL-assisted in toluene. Even at proportion precursor/toluene (∼1/1 v/v), still obtained yield, which conducive to reducing use organic solvents. A scale-up well-dispersed proves that P-AMDL avoid wide particle size distribution caused mixing diffusion. After having been stored solid state 100 days, P-AMDL-stabilized be redispersible toluene recover original PL properties 90%), provides safe convenient way storage transportation NCs.

Язык: Английский

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Bilayered Molecular Bridge Mediated by π–π Stacking for Improved Interfacial Charge Transport in Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Abstract Molecular bridges with one end absorbed on the electron transport layer (ETL) and other bound to perovskite can effectively repair imperfections at ETL/perovskite interface. However, single‐layered usually coexist undesired double‐layered molecules, leaving a Van der Waals gap between them. Charge only occur via tunneling effect travel through gap, which requires forward voltage bias leads constrained charge efficiency. Herein, study designs synthesizes an imidazolium derivative ionic salt of 1,3‐dibenzyl‐2‐phenylimidazolium chloride (DPhImCl), featuring multiple aromatic side chains, form bilayered interfacial molecular mediated by π–π stacking. The reveals that DPhIm + strongly adsorbs both SnO 2 surfaces ring, while two layers respectively interact stacking benzene ring in forming bridge /perovskite This interaction promotes orderly creates hopping channels for transport, thus facilitating transfer As result, impressive device efficiency 25.90% (certified 25.27%) robust T 90 operational lifetime 1101 h n‐i‐p solar cells achieved.

Язык: Английский

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