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

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

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Tailored Lattice-Matched Carbazole Self-Assembled Molecule for Efficient and Stable Perovskite Solar Cells

Journal of the American Chemical Society, Год журнала: 2025, Номер 147(9), С. 8004 - 8011

Опубликована: Фев. 18, 2025

Self-assembled monolayer molecules have been widely employed as interfacial transport materials in inverted perovskite solar cells (PSCs), demonstrating high efficiency and improved device stability. However, self-assembling (SAM) often suffer from aggregation weak interactions with the layer, resulting inefficient charge transfer significant energy losses, ultimately limiting power conversion long-term stability of cells. In this work, we developed a series novel skeleton-matching carbazole isomer SAMs based on following key design principles: (1) introducing benzene ring structure to distort molecular skeleton SAM, thereby preventing achieving uniform distribution fluorine-doped tin oxide (FTO) substrates; (2) strategically incorporating methoxy groups onto at different positions (ortho, meta, para). These functional not only increase anchoring points layer but also fine-tune dipole moment. Among SAMs, m-PhPACz exhibits most favorable properties, maximum moment 2.4 D an O-O distance that aligns excellently diagonal lead ions adjacent lattice, enhancing SAM-perovskite interactions, facilitating efficient extraction, improving As result, new SAM-based PSCs achieved impressive 26.2%, 12.9% improvement. Moreover, devices demonstrated outstanding photothermal stability, retaining 96% their initial PCE after 1000 h 85 °C maintaining 90% 300 UV-light exposure.

Язык: Английский

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Perfluorinated Anionic Surfactant Assisted Homogeneous Crystallization for Efficient and Stable Formamidinium‐Based Sn‐Pb Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Abstract Formamidinium (FA)‐based Sn‐Pb perovskite demonstrates superior thermal stability, making it well‐suited for all‐perovskite tandem solar cells. However, the uncontrolled crystallization process remains a significant challenge. In this study, an effective strategy is presented to regulate of FA‐based by incorporating perfluoroanionic surfactant (perfluorohexanesulfonic acid potassium salt, F 13 C 6 SO 3 K) into precursor. The multifunctional sites K, including atoms and − groups, interact with components stabilize colloidal distribution precursor modulate kinetics. This results in high‐quality films fewer defects. Consequently, cell (PSC) achieves champion efficiency 24.33%, open‐circuit voltage 0.895 V fill factor 83.2%. After continuous heating at 65 °C 1008 h, still maintain 91% its initial efficiency, which shows enhanced stability. When coupled wide‐bandgap subcell, reaches power conversion (PCE) 27.57%.

Язык: Английский

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A Versatile Bridging Molecule Managed the Buried SnO₂/Perovskite Interface for Efficient and Stable Perovskite Solar Cells

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Buried interface in perovskite solar cells (PSCs) is a critical determination for the performance and stability because it dominates crystallization of layer, non-radiative recombination, ion migration at interfaces. Herein, novel versatile modifier, potassium sucrose octasulfate (K8SOS) which rich sulfonic groups ions, introduced bridging buried SnO2 interface, to improve interfacial states further device performance. It found that K8SOS serves as bridge can not only passivate defects through multi-site strengthening chemical binding, thus effectively inhibiting non-radiation recombination suppressing migration, but also optimize surface state absorber, ultimately achieving gratifying efficiency 25.32% with negligible hysteresis. What's more, optimized delivers admirable sustaining over 90% initial power conversion after being aged under continuous 85 °C heating stress 40 ± 5% RH humidity ≈600 ≈1200 h 1-sun illumination, respectively.

Язык: Английский

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Organic Molecule Vapor‐Assisted Passivation for Efficient and Stable Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 26, 2025

Abstract Effective suppression of non‐radiative recombination caused by surface defects in perovskite is crucial for achieving high‐efficiency solar cells (PSCs). However, conventional passivators such as organic amine salts are prone to deprotonation amines and rapid reaction with formamidine, leading device degradation. Meanwhile, the solvent processing can also decompose layer due dissolution salts. In this work, an small molecule, 2‐Thiophenacetamide (TAM), features multiple active sites presented. TAM demonstrates ability passivate thin films through sublimation deposition. It demonstrated that solvent‐free method effect thiophene carbonyl group efficiently uncoordinated Pb 2+ , while amino aids stabilizing structures forming hydrogen bonds iodide ions. As a result, vapor treatment enhanced efficiency 25.33%, operational stability maintained at 95% original after continuous operation over 1000 h. Additionally, submodules area 14 cm 2 successfully assembled up 22.17%.

Язык: Английский

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Enhancing α-FAPbI₃ Crystallization and Photovoltaic Performance through Inhibiting MFA Formation

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

Опубликована: Фев. 27, 2025

Methylammonium chloride (MACl) additive is almost irreplaceable in high-performance formamidinium (FA) perovskite photovoltaics. However, the byproduct of methyl (MFA+) from reaction MA0 and FA damages compositional purity phase stability α-FAPbI3. The addition iodine (I2) to FAPbI3 precursor has been reported inhibit formation MFA+. Here, we systematically investigate effect MAI on films devices by using replace MACl I2. results demonstrate that produces more I3- precursor, which inhibits between MA thus blocks Meanwhile, MFA+ reduced due delayed evaporation caused its strong interaction with I3-, facilitating growth α-FAPbI3 an improved bottom morphology. It eliminates unreacted PbI2, forming a homogenized phase, facilitates ordered along (111) facet, enhancing charge transport increasing open-circuit voltage (VOC). optimized device shows 2% improvement PCE, VOC 1.050 1.103 V. Additionally, target retains 97% initial performance after 5495 min operation under maximum power point tracking, compared 82.3% 2000 for control device. This work provides insights into inhibiting byproducts induced MA-FA side following introduction MACl.

Язык: Английский

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Toughened Interface by Engineering the Side Group of Conjugated Polymers to Stabilize Flexible Perovskite Solar Modules

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Perovskite solar cells (PSCs) have attracted considerable attention due to their high power conversion efficiency (PCE), cost-effective manufacturing processes, as well the potential flexibility. However, a significant challenge commercial applications of PSCs is mechanical reliability. In this work, three naphthalene diimide polymers with distinct donor units are chosen reduce surface trap states and enhance long-term stability reliability photovoltaic devices. The champion rigid incorporating conjugated achieved 373% increase adhesion toughness at interface, PCE 25.5% for 0.16 cm2 single cell 22.3% 30.9 module retain 97% initial after 2000 h continuous light soaking. Especially, flexible exhibited improved stability, achieving 24.8% 20.3% 27.9 module, maintaining 95% 5,000 bending cycles. This study highlights interfacial polymer in enhancing PSCs.

Язык: Английский

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Decoding recombination dynamics in perovskite solar cells: an in-depth critical review

Chemical Society Reviews, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This review systematically analyses the recombination pathways in PSCs, unveils cutting-edge suppression strategies, and underscores potential of ML optimizing device performance expediting commercial integration.

Язык: Английский

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Vertically oriented micron-thick perovskite film enables efficient and stable inverted perovskite solar cells

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161966 - 161966

Опубликована: Март 1, 2025

Язык: Английский

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In Situ Impurity Phase Repair Strategy Enables Highly‐Efficient Perovskite Solar Cells with Periodic Photovoltaic Performance

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 13, 2025

Abstract The photoactive α‐phase of formamidinium lead iodide perovskite (α‐FAPbI 3 ) is regarded as one the ideal materials for high‐efficiency solar cells (PSCs) due to its superior optoelectronic properties. However, during deposition α‐FAPbI films, presence impurity phases, such PbI 2 and δ‐FAPbI , can cause formation inherent defects, which leads suboptimal charge transport extraction properties, well inadequate long‐term stability in film's morphology structure. To address these issues, an phase repair strategy employed using FAI/MASCN mixed vapors convert phases into light‐absorbing . Meanwhile, this recrystallization process also facilitates recovery characteristic morphology, thereby improving efficiency enhancing durability PSCs. This approach promotes PSCs obtain 26.05% (with a certified 25.67%, steady‐state PCE 25.41%). Additionally, suitable fabrication large‐area devices, obtaining 1 cm device with 24.52% mini‐module area 17.1 22.35%. Furthermore, it found that enables cyclic aged retaining ≈ 94.3% their initial after two cycles repair, significantly lifetime cells.

Язык: Английский

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