Molecular ferroelectric self-assembled interlayer for efficient perovskite solar cells

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

Published: Jan. 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.

Language: Английский

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A Buried Interface Fastening Approach for Efficient and Flexible Perovskite Photovoltaics

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

Published: May 2, 2025

Abstract Organic–inorganic halide perovskite solar cells (PSCs) have demonstrated a promising advancement in flexible and lightweight photovoltaics. Nevertheless, achieving their large‐area printed fabrication remains challenging, especially the issue of defect enrichment at buried interfaces, which is crucial for efficient carrier transport. Herein, an interfacial fastening strategy designed to enhance performance stability PSCs, involving introduction hexamethylene diisocyanate (HDI) into precursor ethylene glycol (EG) on electron transport layers. The situ reaction between HDI EG during film formation can inhibit complex intermediate phases deposition, thus uniform colloidal distribution, mitigating gradient residual stress mismatch films, enhancing contact. resulting rigid, PSCs modules (25 cm 2 ) achieve PCEs 26.04%, 24.16%, 20.40%, respectively, encapsulated devices retain over 80% efficiencies after storage 6380 h. This work provides potential simultaneously optimize contact quality interface crystallization perovskites, aligns with requirements large‐area, high‐quality, homogeneous deposition photovoltaics facilitates printing manufacturing commercialization transition.

Language: Английский

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Lewis Base Additive Diazine Induced Efficient and Stable Perovskite Solar Cells Made in Ambient Air via a Post-Adding Strategy

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179401 - 179401

Published: Feb. 1, 2025

Language: Английский

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Surface Chemical Conversion of Residual PbI₂ Enables Efficient and Stable Perovskite Solar Cells by 1,3‐Diphenyl‐benzimidazolium Iodide Treatment

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

Published: Feb. 25, 2025

Abstract Perovskite films have long been plagued by defects, mainly located at grain boundaries, leading to device degradation, especially the effects of residual PbI 2 . As effective boundary passivators, organic ammonium salts are thus extensively investigated. Here, study introduces a nitrogen heterocyclic molecule, 1,3‐diphenyl‐benzimidazole iodide (DBI), for post‐treatment perovskite film construct robust one‐dimensional (1D)/three‐dimensional (3D) structure. The 1D structure DBPbI 3 formed from interaction between and DBI enables repair local defects enhancement stability. Concurrently, double conjugated benzene imidazole rings synergistically facilitate charge transfer promote optimization energy levels, thereby boosting extraction. corresponding 1D/3D solar cells (PSCs) yielded high efficiency 25.04% with excellent photo/thermal stabilities. module exhibited an 21.04% total area 36 cm long‐term

Language: Английский

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Methylammonium-Free Perovskite Photovoltaic Modules

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

For perovskite photovoltaic industrialization, it is essential to simultaneously achieve high conversion efficiency, long-term stability, and scalable fabrication of modules. Halide perovskites with the ABX3 structure are composed A-site monovalent cations, (e.g., formamidinium (FA+), methylammonium (MA+), Cs+), B-site divalent cations (predominantly Pb2+), X-site halide anions. Though incorporated MA can facilitate nucleation growth films, their volatility undermines thermal stability. α-FAPbI3 exhibits an optimal bandgap, but both α-CsPbI3 susceptible converting into nonphotoactive δ-phase at room temperature. However, FACsPbI3 alloy effectively counteracts imperfections in tolerance factor, enabling formation a room-temperature photoactive phase. Hence, development large-area, high-quality, MA-free films remains substantial challenge for efficient This review first discusses impact on phase stability structures subsequently examines film mechanism. Then, we summarize modules highlight advances CsPbX3 (Br–/I–), FAPbI3, FACsPbX3 systems. Finally, propose potential directions challenges toward industrialization.

Language: Английский

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Ordered crystal growth of 2D Ruddlesden–Popper perovskites via synergistic fluorination and chlorination for efficient and stable 2D/3D heterostructure perovskite solar cells

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162545 - 162545

Published: April 1, 2025

Language: Английский

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Surface Potential Homogenization Improves Perovskite Solar Cell Performance

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

Published: Nov. 14, 2024

Abstract The synthesis of multicomponent metal halide perovskites (MHPs) by cationic and/or alloying allows band gap tuning, optimizing performance and improving stability. However, these materials often suffer from compositional, structural, property inhomogeneities, leading to uneven carrier transport significant non‐radiative recombination losses in lead perovskites. While many researchers have focused on the aggregation perovskite ions, impact surface potential has received relatively less attention. In this study, multifunctional ionic liquid 1‐allyl‐3‐methylimidazole dicyanamide (AMI) is introduced into precursor effectively regulate layer. This approach inhibits recombination, enhances injection, improves device performance. Surface homogenization within layer leads simultaneous improvements both efficiency stability solar cells. For wide‐bandgap (1.81 eV), optimal power conversion (PCE) reaches 20.44%, with an open‐circuit voltage ( V oc ) 1.339 V, a short‐circuit current density J sc 17.92 mA cm −2 , high fill factor (FF) 85%. strategy also proved effective for conventional bandgap cells (PSCs) (1.53 increase performance, PCE increasing 23.22% 25.41%.

Language: Английский

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Dual‐Surface Polydentate Anchoring Enabled Strain Regulation for Stable and Efficient Perovskite Solar Cells

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

Published: Nov. 18, 2024

Abstract Continuous breakthroughs of photoelectric conversion efficiency (PCE) in perovskite solar cells are achieved, but the inherent instability caused by residual tensile strain and interfacial defects remains a major obstacle to their application. In this study, polydentate ligand‐regulated dual‐surface stress management strategy for (PVK) is introduced eliminate interface via multidentate anchoring. 3‐amino‐5‐bromopicolinaldehyde (BD) employed on lower surface PVK, while its −CO, −NH 2 , pyridine functional groups facilitate bridging SnO with alleviating lowering energy barriers. For upper surface, bis−SO pyridine, bis−CF 3 N‐(5‐Chloro‐2‐pyridyl) bis(trifluoromethanesulfonimide) (FC) utilized increase ion migration barrier through anchoring, which effectively diminishes defects. Besides, −CF also constructs hydrophobic surface. Notably, successfully transforms into compressive based regulation, significantly improving framework stability PVK. Consequently, devices treated BD FC achieve an elevated open‐circuit voltage 1.24 V PCE 24.70%. The modified device (unencapsulated) maintains 92% initial after 2000 h atmosphere 91% 500 under 85% RH, showcasing enhanced stability.

Language: Английский

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A‐D‐A‐type Molecule with Dual Functions of Efficient Charge Extraction and Trap Passivation for n‐i‐p Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 35(2)

Published: Sept. 9, 2024

Abstract Interfacial defects and energy level mismatches between the perovskite 2,2′,7,7′‐tetrakis[N,N‐di(4‐methoxyphenyl)amino]‐9,9′‐spirobifluorene (Spiro‐OMeTAD) layers heavily hinder charge transfer, limiting efficiency stability of n‐i‐p solar cells (PSCs). Herein, D‐type TPA, D‐A‐type TPA‐CN, A‐D‐A‐type DTPA‐CN with triphenylamine units different interfacial dipoles are designed as multifunctional for PSCs. Among three molecules, has largest dipole moment, hole transporting capability, hydrophobicity, therefore strongest passivation best carrier extraction can be observed. As a result, DTPA‐CN‐treated device achieves champion power conversion (PCE) 25.00%, compared to control (22.78%). Moreover, long‐term unencapsulated is significantly improved. After 2,040 h storage in nitrogen glove box, maintains over 90% its initial efficiency, while only 61% device. The work indicates that simultaneous improvement trap critical achieving highly efficient stable

Language: Английский

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