Molecular dipole engineering-assisted strain release for mechanically robust flexible perovskite solar cells

Energy & Environmental Science, Год журнала: 2023, Номер 16(11), С. 5423 - 5433

Опубликована: Янв. 1, 2023

–CN additives are used to sew defects at perovskite grain boundaries and release GB stresses, resulting in low Young's modulus & high mechanical flexibility. Furthermore, 2F-2CN with a stronger molecular dipole enhances the efficiency stability of inverted f-PSCs, yielding exceptional efficiency.

Язык: Английский

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Surface Energy Engineering of Buried Interface for Highly Stable Perovskite Solar Cells with Efficiency Over 25%

Advanced Materials, Год журнала: 2023, Номер 36(2)

Опубликована: Окт. 21, 2023

The abundant oxygen-related defects (e.g., O vacancies, O-H) in the TiO

Язык: Английский

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Buried Interface Dielectric Layer Engineering for Highly Efficient and Stable Inverted Perovskite Solar Cells and Modules

Advanced Science, Год журнала: 2023, Номер 10(19)

Опубликована: Апрель 25, 2023

Stability and scalability are essential urgent requirements for the commercialization of perovskite solar cells (PSCs), which retarded by non-ideal interface leading to non-radiative recombination degradation. Extensive efforts devoted reducing defects at surface. However, effects buried on degradation need be further investigated. Herein, an omnibearing strategy modify top surfaces film reduce interfacial defects, incorporating aluminum oxide (Al2 O3 ) as a dielectric layer growth scaffolds (buried surface) phenethylammonium bromide passivation surfaces), is demonstrated. Consequently, open-circuit voltage extensively boosted from 1.02 1.14 V with incorporation Al2 filling voids between grains, resulting in dense morphology reduced centers. Finally, impressive efficiencies 23.1% (0.1 cm2 22.4% (1 achieved superior stability, remain 96% 89% its initial performance after 1200 2500 h illumination, respectively. The dual modification provides universal method revealing promising prospect developing high-performance PSCs modules.

Язык: Английский

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Manipulating Electron Density Distribution of Nicotinamide Derivatives Toward Defect Passivation In Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2023, Номер 13(30)

Опубликована: Июнь 22, 2023

Abstract The design of additives mainly involves selection functional groups with coordination relationships defects in perovskite materials. However, it is particularly important to further adjust the geometrical configuration and electronic structure an additive. Here, nicotinamide (NA) its derivative 6‐Methylnicotinamide (CNA) electron‐donor are comparatively analyzed investigate effect molecular dipole on defect passivation absorbers photovoltaic properties solar cells (PSCs). Theoretical calculations demonstrate that CNA molecule large combine undercoordinated Pb 2+ ions form a higher binding energy, which beneficial improve formation energy Pb‐related defects. Experimental characterization confirms significantly enhances between acylamino defective cations, conducive obtain high‐quality, low‐defect density state, grain size, smooth surface absorbers. Thanks cloud distribution molecules, PSCs yield impressive efficiency as high 24.33% excellent environmental storage, heat, light stabilities. This research provides basis for designing steric‐charge‐dependence assist photovoltaics.

Язык: Английский

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Interface Dipole Management of D–A‐Type Molecules for Efficient Perovskite Solar Cells

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(30)

Опубликована: Май 7, 2024

Abstract Interfacial engineering of perovskite films has been the main strategies in improving efficiency and stability solar cells (PSCs). In this study, three new donor‐acceptor (D–A)‐type interfacial dipole (DAID) molecules with hole‐transporting different anchoring units are designed employed PSCs. The formation interface dipoles by DAID on film can efficiently modulate energy level alignment, improve charge extraction, reduce non‐radiative recombination. Among molecules, TPA‐BAM amide group exhibits best chemical optoelectrical properties, achieving a champion PCE 25.29 % enhanced open‐circuit voltage 1.174 V fill factor 84.34 %, due to reduced defect density improved hole extraction. Meanwhile, operational unencapsulated device significantly improved. Our study provides prospect for rationalized screening materials efficient stable

Язык: Английский

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Tailoring Perovskite Surface Potential and Chelation Advances Efficient Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(24)

Опубликована: Март 13, 2024

Abstract Modifying perovskite surface using various organic ammonium halide cations has proven to be an effective approach for enhancing the overall performance of solar cells. Nevertheless, impact structural symmetry these on interface termination remained uncertain. Here, this work investigates influence devices, molecules based symmetrical bis(2‐chloroethyl)ammonium cation (B(CE)A + ) and asymmetrical 2‐chloroethylammonium (CEA as layers between hole transport layer. These results reveal that B(CE)A lead a more homogeneous potential comprehensive chelation with uncoordinated Pb 2+ compared cations, resulting in favorable energy band alignment strengthened defect healing. This strategy, leveraging spatial geometrical promotes carrier extraction functional reduces nonradiative recombination surface. Consequently, cells processed achieve power conversion efficiency (PCE) 25.60% retain ≈91% their initial PCE after 500 h maximum point operation. highlights significant benefits utilizing structurally promoting stability

Язык: Английский

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Solvation‐Driven Grain Boundary Passivation Improving the Performance of Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер 14(10)

Опубликована: Янв. 9, 2024

Abstract The efficiency of perovskite solar cells (PSCs) is hindered by substantial defects within the grain boundaries (GBs) polycrystalline films. Conventional post‐treatment strategies struggle to precisely repair these at GBs. Here, a targeted boundary passivation strategy through solvent effects incorporating symmetrical biphenyl molecules proposed, 4,4′‐diaminodiphenyl sulfone (DDS) and 4,4′‐sulfodiphenol (SDP), aiming mitigate GBs optimize energy level arrangements their electric dipole effects. Compared pristine device, SDP‐modified device exhibits significant improvements, including champion 24.39% an impressive fill factor, along with excellent operation stability. This work provides effective straightforward solution for improving performance PSCs.

Язык: Английский

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Molecular ferroelectric self-assembled interlayer for efficient perovskite solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 19, 2025

The interfacial molecular dipole enhances the photovoltaic performance of perovskite solar cells (PSCs) by facilitating improved charge extraction. However, conventional self-assembled monolayers (SAMs) face challenges like inadequate interface coverage and weak interactions. Herein, we develop a strategy using ferroelectric layer to modify properties PSCs. Specifically, employ 1-adamantanamine hydroiodide (ADAI) establish robust chemical interactions create over perovskite. oriented packing spontaneous polarity ADAI generate substantial dipole, adjusting band bending at anode, reducing misalignment, suppressing recombination. Consequently, our formamidinium lead iodide-based PSC achieves efficiencies 25.13% (0.06 cm2) 23.5% (1.00 while exhibiting enhanced stability. Notably, demonstrate an impressive efficiency 25.59% (certified 25.36%) in 0.06 cm2 area for inverted champion device, showcasing promise SAMs PSCs enhancement. approach with applying monolayer suffers from limited weaker Here, authors molecule construct layer, achieving certified 25.36% cells.

Язык: 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, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

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Challenges in the design and synthesis of self-assembling molecules as selective contacts in perovskite solar cells

Chemical Science, Год журнала: 2023, Номер 15(5), С. 1534 - 1556

Опубликована: Ноя. 10, 2023

We summarize the challenges to design and synthesize self-assembled molecules, discussing their synthetic routes structural features in relationship efficiency of perovskite-based solar cells where they are applied as selective contacts.

Язык: Английский

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