Suppressing Deprotonation to Extend the Shelf Life of Perovskite Precursor Solutions and Enhance the Stability and Efficiency of Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Abstract Amid the rapid advancement of formamidine (FA)‐based perovskite solar cells (PSCs), methylammonium chloride (MACl) has emerged as a pivotal molecule, widely recognized in achieving high‐efficiency PSCs. However, precursor solution (PPS), particularly after prolonged storage, deprotonated MA⁺ (MA 0 ) undergoes cationic addition with FA⁺, leading to relative depletion FA⁺ and reduction crystalline phase purity. Herein, using Piperazine‐2‐carboxylic acid dihydrochloride (PCADCl) inhibit deprotonation by forming strong two‐point hydrogen bonds between piperazine's amine groups proton (H⁺) MA⁺is proposed, thereby extending shelf life PPS. Furthermore, COOH PCADCl furtherly suppress while promoting coordination unbound Pb 2+ , reducing film defects improving purity phase. Additionally, energy level arrangement PSCs is improved. Benefiting from this strategy, PSC fabricated modified PPS achieves an impressive efficiency 25.56% retains 96% its initial performance aging for 20 days. Moreover, unencapsulated device 97% over 1300 h. This work significantly advances process development scientific research, representing crucial step toward large‐scale production commercialization

Язык: Английский

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Endogenous Intermediate Template Guided Crystallization for High Performance FAPbCl₃ UV Detector

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 2, 2025

Abstract Lead‐chloride perovskite is a promising candidate for the active layer of UV detectors. However, due to high ionic character chloride compound, it difficult form ligand‐lead adduct that guides crystallization perovskite, resulting in poor film quality and device performance. Herein, an endogenous intermediate template strategy developed guide lead‐chloride FAPbCl 3 (FA = formamidine). Based on enrichment hydrogen bonds between ligands, low dimensional N‐Pb‐O ‐DMSO (DMSO dimethyl sulfoxide) observed precursor liquid. This results formation, not external introduction FA x PbCl y (x>1, y>3) phase, serving as guiding oriented growth with large closely packed grain. As result, shows much stronger PL intensity significantly reduced defect density. Therefore, self‐driven detector realized responsivity, detectivity response time 0.63 A W −1 , 1.3 × 10 13 Jones, 205/53 µs at 365 nm zero bias. Furthermore, first time, uniform 64 array successfully fabricated achieves image sensing function.

Язык: Английский

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Interface Field Engineering of Weakly Alkaline-Treated PEDOT:PSS for Enhanced Performance and Stability of Tin-Based Perovskite Solar Cells

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 5258 - 5264

Опубликована: Май 19, 2025

State-of-the-art tin-based perovskite solar cells (TPSCs) commonly use a water-based poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transport layer. However, the strong acidity of PEDOT:PSS, arising from deprotonation its -SO3H group in PSS chains due to low acid dissociation constant (pKa), often degrades tin films, compromising both device performance and stability TPSCs. Here, we present novel interface engineering strategy using ammonium hydroxide (NH4OH) treated which effectively neutralizes acidic groups while simultaneously improving quality films preferentially oriented crystal growth. Besides, this improves conductivity layer suppresses charge recombination high-quality films. As result, devices achieve remarkable power conversion efficiency 13.3%, alongside significant improvements stability. Notably, unencapsulated retain 85% their initial after approximately 1600 h N2. Our method marks advancement, integrating enhanced with improved durability offering scalable pathway for commercialization photovoltaics.

Язык: Английский

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Enhanced hole extraction through in situ mixed self-assembled molecules for efficient inverted perovskite solar cells

Journal of Energy Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Язык: Английский

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Heterogeneous Nucleation-Induced Upward Crystallization for Perovskite Solar Cells

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 2972 - 2977

Опубликована: Май 27, 2025

Язык: Английский

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