Reductive Sn²⁺ Compensator for Efficient and Stable Sn‐Pb Mixed Perovskite Solar Cells

Advanced Science, Год журнала: 2024, Номер 11(25)

Опубликована: Апрель 18, 2024

Abstract Tin‐lead (Sn‐Pb) mixed perovskite with a narrow bandgap is an ideal candidate for single‐junction solar cells approaching the Shockley‐Queisser limit. However, due to easy oxidation of Sn 2+ , efficiency and stability Sn‐Pb (PSCs) still lag far behind that Pb‐based cells. Herein, highly efficient stable FA 0.5 MA Pb I 0.47 Br 0.03 compositional PSCs are achieved by introducing appropriate amount multifunctional Tin (II) oxalate (SnC 2 O 4 ). SnC compensative reductive group C 2− effectively passivates cation anion defects simultaneously, thereby leading more n‐type films. Benefitting from energy level alignment suppression bulk nonradiative recombination, cell treated achieves power conversion 21.43%. More importantly, chemically suppresses notorious significant enhancement in stability. Particularly, it dramatically improves light

Язык: Английский

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Synergistic immobilization of ions in mixed tin-lead and all-perovskite tandem solar cells

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

Опубликована: Апрель 11, 2025

Low-bandgap (LBG) mixed tin-lead (Sn-Pb) perovskite solar cells (PSCs) suffer from inferior performance due to their high defect density. Conventionally, ethylenediammonium diiodide (EDADI) is used as a surface passivator reduce defects and improve device photovoltaic performance, but it introduces severe hysteresis caused by excessive mobilized ions at the top interface. Here, we report mobile ion suppressing strategy of using hydrazine monohydrochloride (HM) bulk anchor free in LBG perovskites. The protonated (N2H5+) HM formed hydrogen bonds with iodine (I-) ions, while chloride (Cl-) occupied I- vacancies, collectively impeding migration thus mitigating movement-induced that arose EDADI usage. synergistic doping post-treatment significantly suppresses oxidation Sn2+, decreases trap density, inhibits rapid crystallization perovskite. Consequently, achieved champion efficiency 23.21% for PSCs. Integrating these wide-bandgap PSCs into all-perovskite tandem yields 28.55% (certified 28.31%) negligible hysteresis.

Язык: Английский

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Optimizing Blade‐Coated Tin–lead Perovskite Solar Cells and Tandems with Multi‐Carboxyl and Amino Group Integration

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 16, 2024

Abstract Mixed tin–lead (Sn–Pb) perovskites often face a daunting challenge: rapid and uncontrollable crystallization, leading to plethora of defects significant stress. This issue is particularly exacerbated during the blade‐coating preparation scalable Sn–Pb perovskite films. In this study, facile strategy involving addition ammonium citrate (AC) narrow‐bandgap mixed precursors introduced. AC, armed with its arsenal multiple carboxyl amino groups, acts as virtuoso conductor, orchestrating controlled crystal growth by harmonizing Pb 2+ Sn ions. significantly boosts crystallinity films, alleviates interface stress, inhibits oxidation, mitigates interfacial defects. Consequently, The blade‐coated AC‐incorporated solar cells achieve high photovoltaic conversion efficiency nearly 21%. Furthermore, extending two‐terminal all‐perovskite tandem yielded remarkable maximum 27.20%. work presents an effective for producing efficient cells, heralding pathway toward fabrication cells.

Язык: Английский

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Sunlight-Driven Synthesis of TiO2/(MA)2SnCl4 Nanocomposite Films for Enhanced Photocatalytic Degradation of Organic Pollutants

Catalysts, Год журнала: 2025, Номер 15(3), С. 214 - 214

Опубликована: Фев. 24, 2025

In this study, a TiO2/(MA)2SnCl4 nanocomposite film was synthesized using sustainable, sunlight-driven approach, demonstrating enhanced photocatalytic performance for environmental remediation. TiO2 nanoparticles (TiO2-NPs) were dispersed in ethanol and mixed with methylammonium (MA) SnCl2 precursor solution, followed by drop-casting onto glass substrate exposure to direct sunlight 2 h. Sunlight served as an energy source, facilitating situ structural modifications leading the formation of well-integrated hybrid structure, where effectively encapsulated. Characterization revealed band gap reduction from 3.1 eV 2.6 nanocomposite, extending light absorption into visible range. The Sn–O–Ti interactions charge separation, minimized electron–hole recombination, improved carrier dynamics. Photocatalytic degradation tests methylene blue (MB) under showed that achieved 90% MB within 60 min, outperforming TiO2-NPs, which only 75% degradation. presence oxygen vacancies (OVs) generated during further efficiency acting traps reaction sites. This study introduces green synthesis strategy leveraging renewable marking first integration (MA)2SnCl4 TiO2-NPs photocatalysis. synergistic effects extended visible-light absorption, defect engineering, efficient separation make films scalable, cost-effective solution water purification applications, offering promising solar-driven approach addressing global contamination challenges.

Язык: Английский

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Defects Mitigation and Charge Transport Promotion via a Multifunctional Lewis Base for Efficient 2D/3D Tin Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

Abstract Tin perovskite solar cells (PSCs) have garnered considerable attention as promising alternatives to lead PSCs due their lower toxicity and outstanding optoelectronic properties. However, efficiency stability, particularly in 2D/3D tin PSCs, are usually hindered by high defect densities inefficient carrier transport. In this study, a small‐molecule Lewis base with multiple functional groups‐cyanoacetohydrazide (CAH) is employed mitigate defects enhance charge transport PSCs. It revealed that the carbonyl, amine, cyano groups CAH form strong chemical bonds Sn 2+ ions, resulting synergetic coordination effects. Moreover, interaction between effectively regulates crystallization process of film, high‐quality film enhanced crystallinity, reduced density, modulated phase distribution. As result, optimized achieve remarkable power conversion 15.06%, marking one highest values for Furthermore, devices exhibit retaining 95% initial performance after 2000 h storage nitrogen atmosphere.

Язык: Английский

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Research Progress of Cs-Based All-Inorganic Perovskite Solar Cells

Energies, Год журнала: 2024, Номер 17(11), С. 2671 - 2671

Опубликована: Май 31, 2024

In recent years, all-inorganic perovskite solar cells have become a research hotspot in the field of photovoltaics due to their excellent stability and optoelectronic performance, power conversion efficiency has increased from initial 2.9% over 20%. This article briefly introduces development cesium lead-based (CsPbX3-IPSC), including characteristics CsPbX3 materials, preparation methods, structure working principle IPSCs. Different optimization strategies for preparing high performance high-stability IPSCs, such as element doping interface modification, are discussed. The application prospects IPSCs also summarized.

Язык: Английский

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Flexible Narrow Bandgap Sn–Pb Perovskite Solar Cells with 21% Efficiency Using N,N′-Carbonyldiimidazole Treatments

ACS Nano, Год журнала: 2024, Номер unknown

Опубликована: Окт. 28, 2024

Flexible tin-lead (Sn-Pb) mixed perovskite solar cells (PSCs) are among the promising flexible photovoltaics, owing to narrow bandgap (NBG) of Sn-Pb perovskites, and wearable features, their role as a critical component in all-perovskite tandem photovoltaics. However, PSCs suffer from low power conversion efficiency, no higher than 18.5%, along with limited stability. Herein, we reported an efficient stable NBG PSC via

Язык: Английский

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Inhibition of Sn (II) Oxidation Via Triacetoxyboro‐Hydride for Stable Tin‐Lead Perovskite Solar Cells

Solar RRL, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Tin‐lead (Sn‐Pb) perovskites with narrow bandgaps can be used as bottom cells for tandem to boost the efficiency of perovskite solar (PSCs). However, uncontrollable crystallization Sn–Pb and straightforward oxidation Sn 2+ 4+ are two key factors that restrict their stability. Compared anti‐solvent method, vacuum flash assisted solution processing (VASP) offers advantages environmental protection excellent controllability. In this study, we combined VASP post‐processing sodium triacetoxyboro‐hydride (STAB) a reducing agent passivator. The experimental theoretical results demonstrat interactions occurred between specific functional groups (−CH 3 , B–H, CO) perovskite. Therefore, was successfully inhibited film quality improved. optimized PSCs STAB increased from 18.2% 21.64%, which is highest power conversion among fabricated using method. addition, device retained 81% its initial after being stored in N 2 under −0.1 MPa 1400 h.

Язык: Английский

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Perovskite‐Coupled NIR Organic Hybrid Solar Cells Achieving an 84.2% Fill Factor and a 25.2% Efficiency: A Comprehensive Mechanistic Exploration

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Март 12, 2025

Abstract The integration of organic dyes in perovskite solar cells (PSCs) to utilize near‐infrared (NIR) photons remains a challenge. In this study, selenium‐incorporated ortho‐benzodipyrrole‐based NIR dye CB‐2Se was developed. CB‐2Se, featuring lower bandgap 1.35 eV, blended with PCBM form bulk‐heterojunction layer PSCs for electron extraction and transport. Compared Y6‐16 acceptor, the removal Tz unit suppresses self‐aggregation, improving its compatibility PCBM. A CB‐2Se:PCBM‐incorporated PSC achieved remarkable power conversion efficiency (PCE) 25.18% V OC 1.164 V, J SC 25.71 mA/cm 2 , Fill Factor 84.15%, outperforming that PCBM‐only reference device (24.35%) PCBM:Y6‐16‐based (24.49%). PCBM:CB‐2Se enhanced long‐term stability PSCs, retaining 88% initial after 1000 h under ambient air thermal conditions. photophysical interactions between have been comprehensively investigated by using femtosecond transient absorption spectroscopy. Ultrafast exciton separation into free charges occurs within 200 femtoseconds at interfaces CB‐2Se. For first time, transfer holes from back detected, providing valuable insights charge dynamics utilizing dyes.

Язык: Английский

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Gradient Doping Strategy for Sn─Pb Mixed Perovskite Solar Cells with High Efficiency and Stability

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Sn─Pb hybrid perovskite has attracted more attention due to its ideal bandgap and excellent photoelectric properties. However, easy oxidation poor crystallinity caused by the introduction of Sn2+ have become two major problems. In this study, is doped in Pb-based prepare high crystalline mixed with larger grain size using solvent engineering technique cooperation optimization HCOOH. The reducibility HCOOH inhibition deprotonation significantly prevent decomposition A-site cations. experimental theoretical results show that interactions between Pb2+, which reduce defect density improve stability film addition, compact SnO2 prepared atomic layer deposition as electronic transformation further devices. conversion efficiency solar cells (PSCs) dopant growth method can reach 21.53% better than PSCs traditional method.

Язык: Английский

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