Defects and Defect Passivation in Perovskite Solar Cells

Molecules, Journal Year: 2024, Volume and Issue: 29(9), P. 2104 - 2104

Published: May 2, 2024

Perovskite solar cells have made significant strides in recent years. However, there are still challenges terms of photoelectric conversion efficiency and long-term stability associated with perovskite cells. The presence defects materials is one the important influencing factors leading to subpar film quality. Adopting additives passivate within an effective approach. Therefore, we first discuss types that occur mechanisms their effect on performance. Then, several used discussed, including ionic compounds, organic molecules, polymers, etc. This review provides guidance for future development more sustainable improve performance

Language: Английский

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In Situ Synthesized Low‐Dimensional Perovskite for >25% Efficiency Stable MA‐Free Perovskite Solar Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)

Published: March 26, 2024

Abstract Developing an additive to effectively regulate the perovskite crystallization kinetics for optimized optoelectronic properties of film plays a vital role in obtaining high efficiency and stable solar cells (PSCs). Herein, new is designed directly synthesized precursor solution by utilizing addition reaction between but‐3‐yn‐1‐amine hydrochloride (BAH) formamidinium iodide. It found that its product may control intermediate phase regulating nucleation, leading advantageous 2D induce growth along preferred [001] orientation with not only released lattice strain but also strong interaction passivate surface defects. By taking advantage above synergistic effects, PSC delivers 25.19% open‐circuit voltage ( V OC ) 1.22 V. Additionally, devices demonstrate good stability, remaining over 90% their initial efficiencies under ambient atmosphere conditions 60 days, temperature 85 °C 200 h, or maximum power point tracking 500 h.

Language: Английский

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Crystallization control via ligand–perovskite coordination for high-performance flexible perovskite solar cells

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(17), P. 6256 - 6267

Published: Jan. 1, 2024

Crystallization kinetics modulation of high-performance flexible perovskite photovoltaics achieving autonomous energy generation under outdoor settings.

Language: Английский

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Nonalloyed α-phase formamidinium lead triiodide solar cells through iodine intercalation

Science, Journal Year: 2025, Volume and Issue: 387(6731), P. 284 - 290

Published: Jan. 16, 2025

Formamidinium lead triiodide (FAPbI 3 ) is considered the most promising composition for high-performing single-junction solar cells. However, nonalloyed α-FAPbI metastable with respect to photoinactive δ-phase. We have developed a kinetic modulation strategy fabricate high-quality and stable films, assisted by cogenetic volatile iodine intercalation decalation. The of facilitated formation corner-sharing Pb-I framework building blocks reduced barrier formation, whereas decalation improved final perovskite film quality in terms purity overall homogeneity. Solar cells based on this (free other extrinsic ions) achieved power conversion efficiency >24%. devices also exhibited excellent durability, retaining 99% their original after operating more than 1100 hours at 85° ± 5°C under illumination.

Language: Английский

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Melamine holding PbI₂ with three “arms”: an effective chelation strategy to control the lead iodide to perovskite conversion for inverted perovskite solar cells

Energy & Environmental Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Herein, we have proposed a novel tridentate chelation strategy to manage the excessive amount of unreacted PbI 2 in perovskite films, achieving inverted PSC device with PCE 25.66% by sequential deposition method.

Language: Английский

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Iodine Modulates the MACl‐Assisted Growth of FAPbI₃ for High Efficiency Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(25)

Published: April 13, 2024

Abstract The preferential growth of α‐phase formamidinium perovskite (α‐FAPbI 3 ) at low temperatures can be achieved with the incorporation chloride‐based additives, methylammonium chloride (MACl) being most common example. However, compared to other less‐volatile MACl only remains in growing film for a short time before evaporating during annealing, primarily influencing early stages formation. In addition, evaporation as methylamine (MA 0 and HCl introduce side reaction between MA (FA), undermining compositional purity phase stability α‐FAPbI . this study, it is demonstrated that addition iodine (I 2 into FAPbI precursor solution containing suppresses MA‐FA annealing. Additionally, delayed owing strong interaction triiodide. added I facilitates spontaneous prior an improved bottom morphology due formation fewer byproducts. Perovskite solar cells derived from ‐incorporated deliver champion power conversion efficiency 25.2% attributed suppressed non‐radiative recombination.

Language: Английский

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Unraveling the Influence of Solvent on Side Reactions between Formamidinium Lead Triiodide and Methylammonium Cations

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(14), P. 10159 - 10166

Published: April 1, 2024

Formamidinium lead triiodide (FAPbI3) perovskite thin films are commonly deposited through a solution process, often incorporating specific amount of methylammonium halide to stabilize the α-phase or enhance their crystallinity. The precursor for such coatings significantly influences fabrication solar cells (PSCs), involving time-dependent aging and byproduct formation. chemical principle underlying this behavior is believed be related deprotonation methylamine cations (MA+) subsequent reactions with FA+ generate N-methylformamidinium. Nevertheless, role solvent in side between these organic remains unclear. This work systematically investigates reaction reactivity three protic solvents aprotic solvents. We uncover hidden dimethylamine from hydrolysis products N,N-dimethylformamide, promoting MA+. Additionally, we elucidate impact environmental factors, as water oxygen, stabilizing solutions. establishes basic concept scientific direction rationalizing high-efficiency, reproducible, long-term-stable PSCs.

Language: Английский

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Ionic liquid additive in ionic-liquid-based MAPbI3 perovskite ink: Improved film crystallization and device performance in ambient air processed solar cells

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 630, P. 236134 - 236134

Published: Jan. 5, 2025

Language: Английский

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Oxidization Strategy of Coordinating Solvents Mitigates Composition Segregation in Perovskite

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110717 - 110717

Published: Jan. 1, 2025

Language: Английский

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Reactive Passivation of Wide-Bandgap Organic–Inorganic Perovskites with Benzylamine

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

While amines are widely used as additives in metal-halide perovskites, our understanding of the way perovskite precursor solutions impact resultant film is still limited. In this paper, we explore multiple effects benzylamine (BnAm), also referred to phenylmethylamine, passivate both FA

Language: Английский

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