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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Benzoyl Sulfonyl Molecules for Bilateral Passivation and Crystalline Regulation at Buried Interfaces toward High‐Performance Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(22)

Published: Feb. 5, 2024

Abstract Well‐engineered buried interfaces play a pivotal role in achieving high‐performance perovskite solar cells (PSCs). A superior interface involves controlled crystallization, efficient charge transfer across interfaces, and robust interfacial bonding. Here, class of innovative additives, benzoyl sulfonyl molecules including 4‐sulfobenzoic acid monopotassium salt (K‐SBA), 4‐sulfamoylbenzoic (SBA) is introduced to tailer the SnO 2 /perovskite interface, aiming meet these essential criteria. Among them, K‐SBA performed better. The findings reveal that functional groups establish interactions with both perovskite, leading effective bilateral passivation mitigation stress. This results formation pore‐free high‐quality films substantial crystal sizes. Consequently, PSCs incorporating exhibited notable increase efficiency, 24.56% efficiency compared control device's 22.27%. Furthermore, K‐SBA‐enhanced maintain 90% their original even after 500 h maximum power point tracking. work provides valuable insights for further refinement advancement PSCs.

Language: Английский

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Spontaneous bifacial capping of perovskite film for efficient and mechanically stable flexible solar cell

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 2, 2025

Flexible perovskite solar cells (F-PSCs) are appealing for their flexibility and high power-to-weight ratios. However, the fragile grain boundaries (GBs) in films can lead to stress strain cracks under bending conditions, limiting performance stability of F-PSCs. Herein, we show that film facilely achieve situ bifacial capping via introducing 4-(methoxy)benzylamine hydrobromide (MeOBABr) as precursor additive. The spontaneously formed MeOBABr layers flatten boundary grooves (GBGs), enable release mechanical at GBs during bending, rendering enhanced robustness. They also contribute reduction residual passivation surface defects film. Besides, molecular polarity result band favors interfacial charge extraction. corresponding inverted F-PSCs based on nickel oxide (NiOx)/poly(triaryl amine) (PTAA) hole transport bilayer reach a 23.7% power conversion efficiency (PCE) (22.9% certified) AM 1.5 G illumination 42.46% PCE 1000 lux indoor light illumination. Meanwhile, robust durability device is achieved. flexible limited by films. Here, authors in-situ demonstrate stable devices with maximum 23.7%.

Language: Английский

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Highly Efficient and Stable Flexible Perovskite Solar Cells Enabled by Alkylammonium Acetate Modification with Varied Dipole Moments

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

Published: Jan. 28, 2025

Abstract Interface modification with the ability to passivate defects and regulate interface energy level is an important method maximize photovoltaic performance of perovskite solar cells (PSCs). Herein, through modifying between hole transport layer via different alkylammonium acetate ionic liquid molecules varied dipole moments, efficient stable PSCs are achieved. Especially, hexylammonium (HAAc) high moment can reduce difference facilitate extraction loss. In addition, HAAc has a strong chemical binding both acceptor donor on surfaces synergistic passivation HA + cation Ac − anion, thereby reducing defect‐assisted recombination. The combined effects modulation defect suppression lead overall enhancement in device performance. best HAAc‐passivated reaches efficiency up 25.06% maintains > 97.30% initial for 1000 h air 30 ± 10% humidity. flexible exhibit excellent mechanical stability, remaining above 71% value after 10 000 bending cycles at small radius 5 mm.

Language: Английский

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Amorphous F‐doped TiO_x Caulked SnO₂ Electron Transport Layer for Flexible Perovskite Solar Cells with Efficiency Exceeding 22.5%

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(11)

Published: Jan. 3, 2023

Abstract Flexible perovskite solar cells (f‐PSCs) show great promise in portable‐power applications (e.g., chargers, drones) and low‐cost, scalable productions roll‐to‐roll). However, conventional n–i–p architecture f‐PSCs, the low‐temperature processed metal oxide electron transport layers (ETLs) usually suffer from high resistance severe defects that limit power conversion efficiency (PCE) improvement of f‐PSCs. Besides enhancement mobility passivation for perovskite/ETL interfacial reported previous literature, herein, loss between nanocrystallines within ETL is studied by introducing an amorphous F‐doped TiO x (F‐TiO ) caulked crystalline SnO 2 composite ETL. The F‐TiO this novel acts as interstitial medium adjacent nanocrystallines, which can provide more channels, effectively passivate oxygen vacancies, optimize energy level arrangement, thus significantly enhancing reducing charge losses. ETL‐based f‐PSCs achieve a PCE 22.70% good operational stability. Furthermore, moderate roughness endows with superior mechanical reliability virtue strong coupling at ETL/perovskite interface, maintain 82.11% their initial after 4000 bending cycles.

Language: Английский

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