Self-assembled hole-selective contact for efficient Sn-Pb perovskite solar cells and all-perovskite tandems

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

Опубликована: Янв. 2, 2025

Self-assembled monolayers (SAMs) have displayed unpredictable potential in efficient perovskite solar cells (PSCs). Yet most of SAMs are largely suitable for pure Pb-based devices, precisely developing promising hole-selective contacts (HSCs) Sn-based PSCs and exploring the underlying general mechanism fundamentally desired. Here, based on prototypical donor-acceptor SAM MPA-BT-BA (BT), oligoether side chains with different length (i.e., methoxy, 2-methoxyethoxy, 2-(2-methoxyethoxy)ethoxy group) were custom-introduced benzothiadiazole unit to produce target acronyms MPA-MBT-BA (MBT), MPA-EBT-BA (EBT), MPA-MEBT-BA (MEBT), respectively, acting as HSCs Sn-Pb all-perovskite tandems. The introduction enables effectively accelerate hole extraction, regulate crystal growth passivate surface defects perovskites. In particular, benefiting from enhanced film quality suppressed interfacial non-radiative recombination losses, EBT-tailored LBG devices yield a champion efficiency 23.54%, enabling 28.61% monolithic tandems an impressive VOC 2.155 V excellent operational stability well 28.22%-efficiency 4-T development is highly desirable. authors report self-assembled achieve operationally stable

Язык: Английский

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Methylammonium-free, high-efficiency, and stable all-perovskite tandem solar cells enabled by multifunctional rubidium acetate

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

Опубликована: Янв. 30, 2025

All-perovskite tandem solar cells (APTSCs) offer the potential to surpass Shockley-Queisser limit of single-junction at low cost. However, high-performance APTSCs contain unstable methylammonium (MA) cation in tin-lead (Sn-Pb) narrow bandgap subcells. Currently, MA-free Sn-Pb perovskite (PSCs) show lower performance compared with their MA-containing counterparts. This is due high trap density associated Sn2+ oxidation, which exacerbated by rapid crystallization Sn-containing perovskite. Here, a multifunctional additive rubidium acetate (RbAC) proposed passivate We find that RbAC can suppress alleviate microstrain, and improve crystallinity Consequently, resultant PSCs achieve power conversion efficiency (PCE) 23.02%, an open circuit voltage (Voc) 0.897 V, filling factor (FF) 80.64%, more importantly stability device significantly improved. When further integrated 1.79-electron volt wide-bandgap PSC, 29.33% (certified 28.11%) efficient Voc 2.22 volts achieved. The tin (II) oxidation impacts cation-free cells. authors employ for defect passivation stable all-perovskite

Язык: Английский

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Buried Interface Modulation Using Self‐Assembled Monolayer and Ionic Liquid Hybrids for High‐Performance Perovskite and Perovskite/CuInGaSe₂ Tandem Photovoltaics

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

Effective modifications for the buried interface between self-assembled monolayers (SAMs) and perovskites are vital development of efficient, stable inverted perovskite solar cells (PSCs) their tandem photovoltaics. Herein, an ionic-liquid-SAM hybrid strategy is developed to synergistically optimize uniformity SAMs crystallization above. Specifically, ionic liquid 1-butyl-3-methyl-1H-imidazol-3-iumbis((trifluoromethyl)sulfonyl)amide (BMIMTFSI) incorporated into SAM solution, enabling reduced surface roughness, improved wettability, a more evenly distributed potential film. Leveraging this optimized substrate, favorable growth high-quality crystals achieved. Furthermore, introduced functional ions readily bond with perovskites, effectively passivating undesirable cation or halide vacancies near interface. Remarkably, high power conversion efficiencies (PCEs) 25.68% 22.53% obtained normal-bandgap (≈1.55 eV) wide-bandgap (WBG) (≈1.66 PSCs along operational stability. Additionally, champion PCE 19.50% achieved semitransparent WBG PSCs, further delivering impressive 28.34% integrated four-terminal photovoltaics when combined CuInGaSe2 cells.

Язык: Английский

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The progress and challenges of tin-lead alloyed perovskites: Toward the development of large-scale all-perovskite tandem solar cells

Chem, Год журнала: 2025, Номер 11(1), С. 102384 - 102384

Опубликована: Янв. 1, 2025

Язык: Английский

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Stabilizing Tin–Lead Mixed Perovskite Solar Cells: A Spotlight on Antioxidation Strategies

ACS Applied Electronic Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

Tin–lead (Sn–Pb) mixed perovskites have emerged as promising light-absorbing materials for single-junction and all-perovskite tandem solar cells due to their favorable narrow bandgaps high theoretical power conversion efficiencies. However, the easy oxidation of Sn2+ Sn4+ results in formation rampant defects during fast crystallization Sn–Pb perovskite thin films remarkable photovoltaic performance decay under operation, impeding practical applications. Herein, this spotlight presents intrinsic origins instability summarizes recent advances antioxidation strategies regarding raw material purification, additive engineering, composition interfacial engineering. Then, remaining challenges future directions are discussed inspire more rational design toward efficient durable cells.

Язык: Английский

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Roadmap on metal-halide perovskite semiconductors and devices

Materials Today Electronics, Год журнала: 2025, Номер unknown, С. 100138 - 100138

Опубликована: Янв. 1, 2025

Язык: Английский

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All‐In‐One Additive Enabled Efficient and Stable Narrow‐Bandgap Perovskites for Monolithic All‐Perovskite Tandem Solar Cells

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 16, 2024

Abstract Hybrid tin‐lead (Sn‐Pb) perovskites have garnered increasing attention due to their crucial role in all‐perovskite tandem cells for surpassing the efficiency limit of single‐junction solar cells. However, easy oxidation Sn 2+ and fast crystallization Sn‐based perovskite present significant challenges achieving high‐quality hybrid Sn‐Pb films, thereby limiting device's performance stability. Herein, an all‐in‐one additive, 2‐amino‐3‐mercaptopropanoic acid hydrochloride (AMPH) is proposed, which can function as a reducing agent suppress formation 4+ throughout film preparation. Furthermore, strong binding between AMPH precursor significantly slows down process, resulting with enhanced crystallinity. The remaining its products within contribute improves resistance substantial reduction defect density, specifically vacancies. Benefiting from multifunctionalities AMPH, power conversion (PCE) 23.07% achieved narrow‐bandgap best‐performing monolithic cell also exhibits PCE 28.73% (certified 27.83%), among highest reported yet. devices retain over 85% initial efficiencies after 500 hours continuous operation at maximum point under one‐sun illumination.

Язык: Английский

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Formic acid-engineered PEDOT:PSS for enhanced crystallinity and performance in tin–lead perovskite solar cells

Applied Physics Letters, Год журнала: 2025, Номер 126(10)

Опубликована: Март 1, 2025

Organic–inorganic hybrid perovskite solar cells (PSCs) have shown tremendous promise due to their excellent optoelectronic properties and cost-efficient fabrication. However, the efficiency of traditional lead halide PSCs is approaching Shockley–Queisser limit, prompting interest in tin-lead (Eg ≈ 1.25 eV) as a candidate for tandem configurations with potential surpass this limit. A key challenge lies optimizing hole transport layer (HTL), widely used PEDOT:PSS suffers from high acidity poor crystallinity, hindering device performance. In work, we formic acid modification enhance its conductivity, energy band alignment, crystallinity. Acid treatment promotes proton transfer, reducing insulating PSS chains improving phase separation, thereby facilitating efficient transport. Tin–lead films fabricated on acid-treated (Fa-PEDOT:PSS) exhibit improved larger grain size, reduced defect density. Devices incorporating Fa-PEDOT:PSS demonstrate enhanced photovoltaic performance, achieving power conversion (PCE) 21.87% hysteresis stability, retaining ∼90% initial after 1600 h an inert atmosphere. These findings highlight optimized HTL tin–lead PSCs, paving way high-efficiency, environmentally friendly technologies.

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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Progress of Hole‐Transport Layers in Mixed Sn‐Pb Perovskite Solar Cells

Small, Год журнала: 2024, Номер 20(49)

Опубликована: Сен. 26, 2024

Hybrid organic-inorganic lead halide perovskite solar cells (PSCs) have rapidly emerged as a promising photovoltaic technology, with record efficiencies surpassing 26%, approaching the theoretical Shockley-Queisser limit. The advent of all-perovskite tandem (APTSCs), integrating Pb-based wide-bandgap (WBG) mixed Sn-Pb narrow-bandgap (NBG) perovskites, presents compelling pathway to surpass this Despite recent innovations in hole transport layers (HTLs) that significantly improved efficiency and stability lead-based PSCs, an effective HTL tailored for NBG PSCs remains unmet need. This review highlights essential role HTLs enhancing performance focusing on their ability mitigate non-radiative recombination optimize buried interface, thereby improving film quality. distinct attributes such lower energy levels accelerated crystallization rates, necessitate specialized properties. In study, latest advancements are systematically examined encompassing organic, self-assembled monolayer (SAM), inorganic materials, HTL-free designs. critically assesses inherent limitations each category, finally proposes strategies surmount these obstacles reach higher device performance.

Язык: Английский

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