Defect passivation in methylammonium/bromine free inverted perovskite solar cells using charge-modulated molecular bonding

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Янв. 29, 2024

Abstract Molecular passivation is a prominent approach for improving the performance and operation stability of halide perovskite solar cells (HPSCs). Herein, we reveal discernible effects diammonium molecules with either an aryl or alkyl core onto Methylammonium-free perovskites. Piperazine dihydriodide (PZDI), characterized by core-electron cloud-rich-NH terminal, proves effective in mitigating surface bulk defects modifying chemistry interfacial energy band, ultimately leading to improved carrier extraction. Benefiting from superior PZDI passivation, device achieves impressive efficiency 23.17% (area ~1 cm 2 ) (low open circuit voltage deficit ~0.327 V) along operational stability. We achieve certified ~21.47% ~1.024 inverted HPSC. strengthens adhesion via -NH I Mulliken charge distribution. Device analysis corroborates that stronger bonding interaction attenuates defect densities suppresses ion migration. This work underscores crucial role bifunctional adsorption mitigation, setting stage design charge-regulated molecular enhance

Язык: Английский

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Amphoteric Ion Bridged Buried Interface for Efficient and Stable Inverted Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(1)

Опубликована: Ноя. 15, 2023

Abstract Synergistic morphology and defects management at the buried perovskite interface are challenging but crucial for further improvement of inverted solar cells (PerSCs). Herein, an amphoteric organic salt, 2‐(4‐fluorophenyl)ethylammonium‐4‐methyl benzenesulfonate (4FPEAPSA), is designed to optimize film energy level alignment interface. 4FPEAPSA treatment promotes growth a void‐free, coarse‐grained, hydrophobic by inducing crystal orientation. Besides, dual‐functional can chemically interact with film, passivate iodine formamidine vacancies, tending revert fermi its defect‐free state. Meanwhile, formation p‐type doping facilitate interfacial charge extraction transport PerSCs reduced carrier recombination loss. Consequently, improves efficiency devices 25.03% better storage, heat, humidity stability. This work contributes strengthening systematic understanding interface, providing synergetic approach realize precise control, effective defect suppression, efficient PerSCs.

Язык: Английский

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Multifunctional Trifluoroborate Additive for Simultaneous Carrier Dynamics Governance and Defects Passivation to Boost Efficiency and Stability of Inverted Perovskite Solar Cells

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(14)

Опубликована: Фев. 10, 2024

Abstract The main obstacles to promoting the commercialization of perovskite solar cells (PSCs) include their record power conversion efficiency (PCE), which still remains below Shockley–Queisser limit, and poor long‐term stability, attributable crystallographic defects in films open‐circuit voltage ( V oc ) loss devices. In this study, potassium (4‐tert‐butoxycarbonylpiperazin‐1‐yl) methyl trifluoroborate (PTFBK) was employed as a multifunctional additive target modulate bulk carrier dynamics PSCs. Apart from simultaneously passivating anionic cationic defects, PTFBK could also optimize energy‐level alignment devices weaken interaction between carriers longitudinal optical phonons, resulting lifetime greater than 3 μs. Furthermore, it inhibited non‐radiative recombination improved crystallization capacity film. Hence, rigid flexible p‐i‐n PSCs yielded champion PCEs 24.99 % 23.48 %, respectively. More importantly, due hydrogen bonding formamidinium fluorine, exhibited remarkable thermal, humidity, operational tracking at maximum point stabilities. reduced Young's modulus residual stress layer provided excellent bending stability for

Язык: Английский

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Strain Engineering and Halogen Compensation of Buried Interface in Polycrystalline Halide Perovskites

Research, Год журнала: 2024, Номер 7

Опубликована: Янв. 1, 2024

Inverted perovskite solar cells based on weakly polarized hole-transporting layers suffer from the problem of polarity mismatch with precursor solution, resulting in a nonideal wetting surface. In addition to bottom-up growth polycrystalline halide perovskite, this will inevitably worse effects residual strain and heterogeneity at buried interface interfacial carrier transport localized compositional deficiency. Here, we propose multifunctional hybrid pre-embedding strategy improve substrate wettability address unfavorable heterogeneities. By exposing interface, it was found that films markedly reduced because presence organic polyelectrolyte imidazolium salt, which not only realized halogen compensation coordination Pb 2+ but also morphology defect recombination were well regulated. Benefitting above advantages, power conversion efficiency targeted inverted devices bandgap 1.62 eV 21.93% outstanding intrinsic stability. addition, coembedding can be extended 1.55 eV, champion device achieved 23.74%. optimized retained 91% their initial (960 h) when exposed an ambient relative humidity 20%, T80 680 h under heating aging 65 °C, exhibiting elevated durability.

Язык: Английский

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Strain Engineering Toward High‐Performance Formamidinium‐Based Perovskite Solar Cells

Solar RRL, Год журнала: 2023, Номер 7(19)

Опубликована: Июль 16, 2023

The power conversion efficiency (PCE) of organic–inorganic halide perovskite solar cells (PSCs) has increased rapidly in recent years, with the certified best single‐junction photovoltaics reaching an astounding PCE 26%. Formamidine (FA)‐based perovskites possess excellent photovoltaic properties and superior thermal stability, establishing them as one most promising materials for light absorption. However, issue phase instability black‐phase formamidinium lead iodide ( α ‐FAPbI 3 ) seriously impeded its commercialization process, strain found films being regarded a significant factor impacting stability PSCs. This article begins by examining sources characterization techniques related to perovskites. Subsequently, it outlines effects on FA‐based presents strategies modify lattice strain. Finally, potential engineering future is discussed. review aims clarify impact perovskite, determine methods enhance device performance, ultimately facilitate these materials.

Язык: Английский

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Key Roles of Interfaces in Inverted Metal-Halide Perovskite Solar Cells

ACS Nano, Год журнала: 2024, Номер 18(16), С. 10688 - 10725

Опубликована: Апрель 11, 2024

Metal-halide perovskite solar cells (PSCs), an emerging technology for transforming energy into a clean source of electricity, have reached efficiency levels comparable to those commercial silicon cells. Compared with other types PSCs, inverted (IPSCs) shown promise regard commercialization due their facile fabrication and excellent optoelectronic properties. The interlayer interfaces play important role in the performance cells, not only affecting charge transfer transport, but also acting as barrier against oxygen moisture permeation. Herein, we describe summarize last three years studies that advantages interface engineering-based advances IPSCs. This review includes brief introduction structure working principle IPSCs, analyzes how affect IPSC devices from perspective photovoltaic device lifetime. In addition, comprehensive summary various engineering approaches solving these problems challenges including use interlayers, modification, defect passivation, others, is summarized. Moreover, based upon current developments breakthroughs, fundamental perspectives on future pathways are provided innovation design next-generation

Язык: Английский

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Recent Advancements in Enhancing Interfacial Charge Transport for Perovskite Solar Cells

Solar RRL, Год журнала: 2024, Номер 8(7)

Опубликована: Фев. 1, 2024

Finding the most suitable pathways to improve interfacial charge transportation in lead halide perovskite solar cells is a highly desirable research area enhance device performance and enable commercialization. The complexities of dynamics, encompassing separation, diffusion, collection processes, pivot on thoughtful selection interlayers their inherent properties. Challenges arise from nonideal interfaces characterized by mismatched energy levels defects that hinder efficient transport. To address these concerns, implementing tailored engineering strategies, including interlayer modification, band alignments, passivation techniques, can help mitigate unwanted nonradiative recombination. This review aims elucidate impact trap states suppressing transport device, along with subsequent techniques designed Following that, comprehensive overview presented, highlighting recent advancements interface properties between electron layer/perovskite perovskite/hole layer. Significantly, using buffer dipole layers as overall stability investigated.

Язык: Английский

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Modulation of Buried Interface by 1‐(3‐aminopropyl)‐Imidazole for Efficient Inverted Formamidinium‐Cesium Perovskite Solar Cells

Small, Год журнала: 2023, Номер 20(4)

Опубликована: Сен. 14, 2023

Abstract Considering the direct influence of substrate surface nature on perovskite (PVK) film growth, buried interfacial engineering is crucial to obtain ideal solar cells (PSCs). Herein, 1‐(3‐aminopropyl)‐imidazole (API) introduced at polytriarylamine (PTAA)/PVK interface modulate bottom property PVK. First, introduction API improves growth PVK grains and reduces Pb 2+ defects residual PbI 2 present film, contributing acquisition high‐quality film. Besides, presence can optimize energy structure between PTAA, which facilitates charge transfer. Density functional theory (DFT) reveals that electron donor unit (R‐C ═ N) prefers bind with traps interface, while formation hydrogen bonds R‐NH I − strengthens above binding ability. Consequently, optimum API‐treated inverted formamidinium‐cesium (FA/Cs) PSCs yields a champion power conversion efficiency (PCE) 22.02% exhibited favorable stability.

Язык: Английский

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Elimination of buried interfacial voids for efficient perovskite solar cells

Nano Energy, Год журнала: 2024, Номер 122, С. 109283 - 109283

Опубликована: Янв. 11, 2024

Язык: Английский

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Synchronous modulation of hole-selective self-assembled monolayer and buried interface for inverted perovskite solar cells

Cell Reports Physical Science, Год журнала: 2024, Номер 5(6), С. 101992 - 101992

Опубликована: Май 20, 2024

Modulating the hole transport layer (HTL) and its interface with perovskite is crucial to lower interfacial losses thereby achieve highly efficient inverted solar cells (PSCs). Here, we develop a mixed strategy for self-assembled monolayer (SAM)-based HTL, where 2-mercaptoimidazole 2-mercaptobenzimidazole are introduced as additives into [2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic acid (MeO-2PACz). It revealed that cluster formation during SAM adsorption leads incomplete substrate coverage. However, these can effectively suppress aggregation by forming complexation MeO-2PACz, affording homogeneous HTLs. The HTLs exhibit better-matched energy bands improve contact, resulting in denser larger grains of bottom perovskite. Moreover, some MeO-2PACz molecules HTL enter films passivate defects. All positive results promote charge transfer inhibit recombination, helping PSCs high power conversion efficiency 24.38% enhanced stability.

Язык: Английский

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