Constructing Stable Perovskite with Small Molecule Bridge Interface Passivation

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

Published: Jan. 5, 2025

Abstract The interfaces of each layer in perovskite solar cells (PSCs) have a significant impact on the charge transfer and recombination. Especially, interface between hole transport (HTL) p‐i‐n type PSCs significantly affects contact characteristics HTL perovskite, hindering further improvements performance stability. Herein, small molecule 9‐Fluorenylmethoxycarbonyl chloride (9‐YT) is introduced as bridge for PSCs, which enhances interaction self‐assembly molecules (SAMs) perovskite. conjugated backbone 9‐YT can interact with SAM (MeO‐2PACz) by π–π stacking reaction. Moreover, also improves interfacial through strong interactions where carbonyl groups Cl atoms uncoordinated Pb 2+ layer. incorporation demonstrated to markedly enhance extraction at perovskite/hole interface, optimize energy level alignment, mitigate recombination, passivate defects Finally, device treated achieves power conversion efficiency (PCE) 24.82%. At same time, still maintain 92.6% original PCE after long‐term stability test 1200 h.

Language: Английский

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Minimizing Buried Interface Energy Losses with Post‐Assembled Chelating Molecular Bridges for High‐Performance and Stable Inverted Perovskite Solar Cells

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

Published: March 3, 2025

Abstract Self‐assembled monolayers (SAMs) as hole‐collecting materials have made remarkable progress in inverted perovskite solar cells (PSCs). However, the incomplete coverage of SAMs and non‐intimate interface contact between perovskite/SAMs usually cause inferior characteristics significant energy losses at heterojunction interface. Herein, a post‐assembled chelating molecular bridge strategy using 5‐(9H‐carbazol‐9‐yl)isophthalicacid (CB‐PA) is developed to modify buried It found that CB‐PA can be chemically coupled with MeO‐2PACz through π–π stacking carbazole groups, chelate by forming double C═O···Pb bonds, thus constructing bridge‐connected promote carrier extraction. Simultaneously, fill voids form dense hybrid SAMs, resulting uniform surface potential improved contact. Moreover, treatment also tends induce oriented crystallization films, passivate defects, release lattice stress Consequently, CB‐PA‐based PSCs achieve champion efficiency 25.27% superior operational stability, retaining ≈94% their initial after maximum power point (MPP) tracking (65 °C) for 1000 h ISOS‐L‐2I protocol. This work provides an innovative address challenges high‐performance PSCs.

Language: Английский

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Restrictive Heterointerfacial Delamination in Flexible Perovskite Photovoltaics Using a Bifacial Linker

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

Published: Feb. 13, 2025

Abstract Flexible perovskite solar cells offer significant potential for portable electronics due to their exceptional power density. However, the commercialization of these devices is hampered by challenges related mechanical flexibility, primarily inadequate adhesion between absorber layer and flexible substrate. Herein, this delamination issue addressed employing a bifacial linker, potassium benzyl(trifluoro)borate (BnBF 3 K), enhance at SnO 2 /perovskite interface. This approach not only improves stability but also reduces buried surface defects optimizes energy level alignment. Consequently, record efficiency 21.82% (certified 21.39%) achieved module with an area 12.80 cm high 24.15% cell. Furthermore, modules exhibit outstanding retaining 96.56% initial after 6000 bending cycles, demonstrating suitability various practical applications.

Language: Английский

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

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(19), P. 6974 - 7016

Published: Jan. 1, 2024

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

Language: 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, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 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.

Language: Английский

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Biomaterial Improves the Stability of Perovskite Solar Cells by Passivating Defects and Inhibiting Ion Migration

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(24), P. 31218 - 31227

Published: June 6, 2024

With the rapid improvement of power conversion efficiency (PCE), perovskite solar cells (PSCs) have broad application prospects and their industrialization will be next step. Nevertheless, performance long-term stability devices are limited by defect-induced nonradiative recombination centers ions' migration inside films. Here, usnic acid (UA), an easy-to-obtain efficient natural biomaterial with a hydroxyl functional group (−OH) four carbonyl groups (−C═O) was added to MAPbI3 precursor regulate crystallization process slowing rate, thereby expanding crystal size preparing films low defect density. In addition, UA anchors uncoordinated Pb2+ suppresses I-ions, which enhances film. Consequently, impressive PCE exceeding 20% achieved for inverted structure MAPbI3-based PSCs. More impressively, optimized PSCs maintained 78% initial under air high humidity (RH ≈ 65%, 25–30 °C) 1000 h. can extracted from plant, usnea, making it inexpensive easy obtain. Our work demonstrates plant material in industrialization, is significant nowadays.

Language: Английский

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In situ Ligand‐Managed SnO₂ Electron Transport Layer for High‐Efficiency and Stable Perovskite Solar Cells

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

Published: Aug. 18, 2024

Abstract Tin oxide (SnO 2 ) with high conductivity and excellent photostability has been considered as one of the most promising materials for efficient electron transport layer (ETL) in perovskite solar cells (PSCs). Among them, SnO nanoparticles (NPs) dispersions have extensively utilized due to their facile film formation. However, inherent defects agglomeration issues NPs, well limited tunability instability post‐treatment process surface/interface engineering strategy, still hinder its further applications. Herein, a ligand‐management strategy implemented during situ synthesis NPs that can effectively achieve uniform modification is proposed. During grafting reaction between diethyl 2‐chloromalonate (DCMA) surface completed. Compared process, this intrinsic DCMA‐passivated (DCMA‐SnO reduces trap state density at interface ETL while enhancing chemical stability. Consequently, PSCs based on DCMA‐SnO champion PCE 25.39% small (active area 0.0655 cm 20.61% modules 23.25 ), demonstrating shelf‐life/light soaking stability (advanced level ISOS protocols). This exhibits significant application potential preparing high‐efficiency large‐area PSCs.

Language: Английский

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Using Post‐Treatment Additives for Crystal Modulation and Interface Passivation Enables the Fabrication of Efficient and Stable Perovskite Solar Cells in Air

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

Published: Oct. 6, 2024

Abstract High‐performance perovskite solar cells (PSCs) fabricated in ambient air are considered inevitable for low‐cost commercial manufacturing. However, passivating film defects and controlling the crystallization process critical achieving high performance PSCs. This study proposes using novel 2D material MBene green antisolvent to simultaneously modulate passivation of perovskites. facilitates uncoordinated Pb 2+ ions, thereby enhancing formation energy vacancies within adjusting level structure. Moreover, increases nucleation sites perovskite, significantly extending crystal growth improving crystallinity, reducing non‐radiative recombination. Consequently, champion devices treated with achieve a power conversion efficiency (PCE) 24.22% when air, exhibit superior humidity long‐term stability. Furthermore, PSCs added significant stability under various environmental conditions, including heat. The results lay foundation development materials photovoltaics, revealing their mechanism as new type perovskites, providing insights industrially producing efficient stable cells.

Language: Английский

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Interface Engineering with KI Modifier Enhances Performance of CsPbBr3 Perovskite Solar Cells

Materials Research Bulletin, Journal Year: 2025, Volume and Issue: 186, P. 113332 - 113332

Published: Feb. 6, 2025

Language: Английский

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Moss-like two-dimensional MBene-Ni/Co bimetallic metal-organic framework composite as efficient cathode for alkaline zinc batteries

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 633, P. 236437 - 236437

Published: Feb. 6, 2025

Language: Английский

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