Tailored Multisite Rigid Conjugated Molecules to Anchor Perovskite for Comprehensive Management of Perovskite Crystallization and Defects

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

Published: Jan. 7, 2025

Abstract engineering has emerged as a promising approach to improve the stability and power conversion efficiency of perovskite solar cells (PSCs) by regulating crystallization or defects. Conventional methods typically focus on single functional group, leading deficiency in simultaneously addressing above mentioned two aspects. Here, an innovative using (methylsulfonyl)phenyl)prop‐2‐en‐1‐amine hydroiodide (MSPPAI) is presented concurrently effectively modulate defect passivation. The unique structure MSPPAI, combining rigid conjugated with multisite anchoring groups (─NH 2 ─SO ─), enables precise regulation through strong interaction components. This promotes preferred (100) orientation crystals, enhances grain size, thus improves film quality. Meanwhile, approximate coplanarity further facilitate ordered directional growth. Furthermore, preventing volatile loss coordinating residual Pb 2+ , MSPPAI could stabilize boundaries surfaces reduce defects prevent degradation. Utilizing these mechanisms, corresponding based devices achieves 25.54% exhibits excellent that maintains 93% its initial even after 1600 h under humid conditions. molecular design strategy presents novel for improving PSCs.

Language: Английский

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Perfluorinated Anionic Surfactant Assisted Homogeneous Crystallization for Efficient and Stable Formamidinium‐Based Sn‐Pb Perovskite Solar Cells

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

Published: Jan. 15, 2025

Abstract Formamidinium (FA)‐based Sn‐Pb perovskite demonstrates superior thermal stability, making it well‐suited for all‐perovskite tandem solar cells. However, the uncontrolled crystallization process remains a significant challenge. In this study, an effective strategy is presented to regulate of FA‐based by incorporating perfluoroanionic surfactant (perfluorohexanesulfonic acid potassium salt, F 13 C 6 SO 3 K) into precursor. The multifunctional sites K, including atoms and − groups, interact with components stabilize colloidal distribution precursor modulate kinetics. This results in high‐quality films fewer defects. Consequently, cell (PSC) achieves champion efficiency 24.33%, open‐circuit voltage 0.895 V fill factor 83.2%. After continuous heating at 65 °C 1008 h, still maintain 91% its initial efficiency, which shows enhanced stability. When coupled wide‐bandgap subcell, reaches power conversion (PCE) 27.57%.

Language: Английский

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Toward Maximizing Hole Selection with Self-Assembled Monolayers in Sn-Based Perovskite Solar Cells

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1292 - 1312

Published: Feb. 17, 2025

Language: Английский

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Efficient Blade‐Coated Wide‐Bandgap and Tandem Perovskite Solar Cells via a Three‐Step Restraining Strategy

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

Published: Nov. 19, 2024

Blade-coating techniques have attracted significant attention for perovskite solar cells (PSCs) due to their high precursor utilization and simplicity. However, the power conversion efficiency (PCE) of blade-coated PSCs often lags behind that spin-coated devices, mainly difficulties in precisely controlling film formation during pre-nucleation, heterogeneous nucleation, crystallization blade-coating N

Language: Английский

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Tailored Supramolecular Interface Enables Efficient and Stable Tin Halide Perovskite Photovoltaics

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1357 - 1365

Published: Feb. 24, 2025

Language: Английский

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Tetramethylurea Based Intermediate Phase Engineering for Efficient and Stable Perovskite Solar Cells

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Abstract Perovskite solar cells (PSCs) are emerging photovoltaic devices renowned for their high efficiency and low cost. Efficient stable PSCs depend on high‐quality perovskite films, which strongly influenced by the excellent nucleation growth. The choice of solvent is critical crystallization behavior films. To improve film quality address uncontrollable fast crystallization, it essential to replace traditional dimethyl sulfoxide (DMSO) solvent. In this work, tetramethylurea (TMU) ligand successfully introduced into DMSO first time. Through intermediate phase engineering, films optimized. stronger interaction between TMU solutes versus can effectively delay transition from phase, yielding with larger grains lower defects. Finally, optimized maintained stability after aging 150 h under 95% relative humidity (RH) or at 85 °C, while device increased 19.54% 21.05%. Furthermore, exhibited outstanding ≈1000 50% RH. This research provides new insights good example achieving highly efficient through engineering.

Language: Английский

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Dual Oxidation Suppression in Lead‐Free Perovskites for Low‐Threshold and Long‐Lifespan Lasing

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

Published: March 17, 2025

Abstract Low lasing threshold and long‐term operational stability are essential in advancing cost‐effective, efficient lead‐free (tin) halide perovskite lasers. However, the rapid crystallization of tin perovskites oxidation Sn 2+ lead to substantial amounts lattice defects, detrimental laser performance enhancement. Herein, a dual suppression strategy is developed suppress 2D perovskites, i.e., adopting an oxygen‐free two‐step growth enhance crystal quality incorporating electron‐donating biuret molecules coordinate with during growth, which led reduction <1 µJ cm − 2 (PEA) MASn I 7 . This represents lowest value nanolasers approximately one order magnitude lower than those previously reported for tin‐based nanolasers. Investigations into spontaneous photoluminescence (PL) stimulated emission revealed that exhibited superior photostability compared their counterparts. Specifically, intensity MA 3 10 constantly increased by >300% under optical pumping decreased ≈17%, not observed The findings highlight prospect as gain materials cavities solution‐processed low thresholds exceptional stability.

Language: Английский

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Morphological engineering for high‐performance perovskite field‐effect transistors

FlexMat., Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract The emergence of perovskite semiconductors for field‐effect transistor (FET) applications has received significant research attention due to their excellent electronic properties. rapid development FETs over the last few years been driven by advances in understanding thin‐film morphologies layers and intriguing correlations with charge carrier transport, device performance, stability. Here we summarize progress morphological engineering aimed at improving electrical parameters FETs. We first discuss mechanisms crystal nucleation growth solution‐processed polycrystalline thin films, along characteristics, including grain boundaries, defects, ionic transport then elaborate on impacts these microstructures performance FET devices. Representative optimization strategies are also presented, showcasing how fundamental understandings have translated into state‐of‐the‐art Finally, provide a perspective remaining challenges future directions optimizing morphologies, toward an in‐depth relationships between film morphology, property next transistor.

Language: Английский

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Double-pulsed-induced medium-range order in Sn-doped Ga2O3 thin films: A strategy for enhanced record-breaking electrical properties

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(15)

Published: April 1, 2025

This study explores Sn-doped Ga2O3 thin films synthesized via the double-pulse metalorganic chemical vapor deposition (MOCVD) method, highlighting its unique advantages in improving film microstructure and electrical properties. The results show that technique, through intermittent atomic supply, promotes medium-range ordering of Sn atoms within lattice, reducing lattice defects enhancing crystallinity. Secondary ion mass spectrometry further reveals a doping activation rate 95%. Notably, exhibit exceptional performance, achieving Hall mobility 175.61 cm2/V·s at carrier concentration 2.17 × 1018 cm−3. value represents record-high for β-Ga2O3 this concentration, significantly surpassing performance prepared conventional continuous methods. offers valuable insights into mechanisms MOCVD potential Ga2O3-based high-performance electronic devices, providing an effective pathway optimizing next-generation materials.

Language: Английский

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Tailored Crystallization Dynamics for Efficient and Stable DMSO‐Free Tin Perovskite Solar Cells

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: May 23, 2025

Abstract Tin perovskite solar cells are emerging as a sustainable lead‐free alternative in thin film photovoltaics. DMSO‐free processed tin perovskites gaining interest due to the detrimental effects of DMSO on oxidation. However, replacing with other solvents remains challenging accelerated crystallization dynamics non‐DMSO systems. In this study, process solvent system is regulated by managing transition from sol‐gel phase solid film. Specifically, piperazine dihydriodide (PDAI) and 4‐ tert ‐butylpyridine (tBP) utilized coordinately tune colloidal chemistry through forming large pre‐nucleation clusters ink, further, facilitating formation process. By combining tBP PDAI, controllable rate achieved evidenced situ photoluminescence (PL) measurement during spin‐coating. As result, films show high crystallinity improved microstructure. Devices treated tBP+PDAI exhibit champion power conversion efficiency 7.8% excellent stability without observable degradation for over 3000 h stored N 2 glovebox. These findings advance understanding cells.

Language: Английский

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