IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202509549

Jiamin Liu,Chuanqi Wang,Ting Xie,Tiantian Gan,Xiwei Xu,Jingjing Tang,Liuting Mo,Zhigao Liu,Zhiyong Qin,Wei Gao,Zequan Li,Shuangliang Zhao

{"title":"Construction of Dual Cross-Linked Conductive Hydrogels: Combining Toughness, Anti-Swelling, And Self-Healing Properties to Achieve Amphibious Multifunctional Sensing.","authors":"Jiamin Liu,Chuanqi Wang,Ting Xie,Tiantian Gan,Xiwei Xu,Jingjing Tang,Liuting Mo,Zhigao Liu,Zhiyong Qin,Wei Gao,Zequan Li,Shuangliang Zhao","doi":"10.1002/smll.202509549","DOIUrl":"https://doi.org/10.1002/smll.202509549","url":null,"abstract":"Conductive hydrogels attract much attention in applications such as flexible electronics and wearable sensors. However, the swelling characteristics of conductive hydrogels in aqueous environments not only limit their long-term application but also adversely affect their performance. This study has developed a tough, anti-swelling, highly conductive dual-network water gel. Polyacrylic acid (PAA) and polyvinyl alcohol (PVA) are used as the backbone, with Zr⁴⁺ introduced to form metal chelation with the carboxyl groups of acrylic acid (AA), and borax forming a dynamic borate crosslinking structure with the PVA network. The prepared hydrogel exhibits a tensile strength of up to 0.92 MPa, toughness of 3.35 MJ m- 3, a conductivity of 3.28 S m-1, and excellent self-healing capabilities (with a self-healing efficiency of up to 99.17%). Its internal multi-crosslinked structure gives it excellent mechanical properties and swelling resistance in marine environments, providing the conditions for hydrogel sensor (PAZr-4 sensor) to function as highly efficient amphibious sensors. The PZAr-4 sensor is used to monitor human movement in a simulated seawater environment. At the same time, a sensor array is constructed using this hydrogel as the basic unit. It is combined with machine learning algorithms to accurately and in real time track the movement of objects on its surface.","PeriodicalId":228,"journal":{"name":"Small","volume":"53 1","pages":"e09549"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-Step Doping of P and S Elements to Fe-ZIF-8 Derivatives for Enhanced ROS Generation and Antibacterial Application. Fe-ZIF-8衍生物一步掺杂P、S元素增强活性氧生成及抗菌应用

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202508557

Jing Cheng,Qiangwei Xin,Yuyue Zhang,Zhengxin Ma,Shiran Sun,Wanshan Gao,Zhongqiang Zhu,Hong Chen,Meng Qin,Jianshu Li

{"title":"One-Step Doping of P and S Elements to Fe-ZIF-8 Derivatives for Enhanced ROS Generation and Antibacterial Application.","authors":"Jing Cheng,Qiangwei Xin,Yuyue Zhang,Zhengxin Ma,Shiran Sun,Wanshan Gao,Zhongqiang Zhu,Hong Chen,Meng Qin,Jianshu Li","doi":"10.1002/smll.202508557","DOIUrl":"https://doi.org/10.1002/smll.202508557","url":null,"abstract":"Artificial enzymes have been rapidly developed in recent years. However, the homogenous charge distribution of active sites hinders the enhancement of the substrate affinity and catalytic efficiency. Herein, a dual-heteroatom doping strategy is developed for the design and modulation of MOF-derived carbon hybrids (ZFPS: ZnS/FeP/Fe4P6N12S). By introducing electronegative P and S atoms, the coordination environment of the metal sites is tuned, leading to the formation of narrow bandgap materials with asymmetric charge distribution and electron-rich active sites. This structural optimization enhances both substrate adsorption-desorption capacity and electron transfer efficiency. Density functional theory calculations confirm that P, S co-doping modulates the D-band electronic structure of Fe sites, thereby enhancing the affinity between the substrates and the active sites. Compared to its counterpart without P, S doping, ZFPS exhibits a 33.3-fold increase in peroxidase-like activity (Kcat/Km), as well as superior halogen peroxidase-like and glutathione depletion capability. The multiple catalytic activities synergistically facilitate the rapid generation of highly toxic reactive oxygen species at low H2O2 concentrations, enabling effective eradication of bacterial biofilms, which is verified in anti-oral-biofilm application. This work establishes a facile strategy for improving the catalytic activities of artificial enzymes, which will promote the development of antimicrobial biomaterials.","PeriodicalId":228,"journal":{"name":"Small","volume":"92 1","pages":"e08557"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Performance of Piezoelectric and Ferroelectric PVDF -TrFE Based Composites Engineered by MWCNTs@BaTiO3 Heterostructure. 基于MWCNTs@BaTiO3异质结构的PVDF -TrFE基压电和铁电复合材料的高性能研究。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202508878

Kejun Shi,Haoyu Xiao,Sepide Taleb,Francisco J Flores-Ruiz,Mónica Acuautla

{"title":"High-Performance of Piezoelectric and Ferroelectric PVDF -TrFE Based Composites Engineered by MWCNTs@BaTiO3 Heterostructure.","authors":"Kejun Shi,Haoyu Xiao,Sepide Taleb,Francisco J Flores-Ruiz,Mónica Acuautla","doi":"10.1002/smll.202508878","DOIUrl":"https://doi.org/10.1002/smll.202508878","url":null,"abstract":"The incorporation of piezoelectric ceramic nanofillers has been shown to effectively promote the formation of piezoelectric phases in PVDF-TrFE polymers, thereby improving both piezoelectric and ferroelectric performance. However, the intrinsic depolarization shielding exerted by the polymer matrix hinders the full polarization of the ceramic phases, thus limiting the improvement of the matrix electrical performance. Here, a novel strategy is proposed by the construction of Multi-walled Carbon Nanotubes (MWCNTs)@BaTiO3 heterostructures to enhance the polarization of composite films. For the first time, MWCNTs are grown in-situ on BaTiO3 nanoparticles by chemical vapor deposition, using their local field enhancement to promote dipole alignment within BaTiO3. With only 5 wt.% of filler, the films exhibit high remanent polarization (14.29 µC cm-2) and piezoelectric coefficients (61.2 pm V-1). Notably, the films maintain a robust piezoelectric response (2.45 V) even under non-transient mechanical loading, high-lighting their potential for acoustic sensing applications. Furthermore, the in-situ interface engineering approach mitigates MWCNTs aggregation within the matrix, obviating labor-intensive post-processing steps such as purification or functionalization. These results in a simplified and cost-effective fabrication route. These findings provide a novel strategy for tuning interfaces in ceramic-reinforced piezoelectric systems, contributing to the advancement of high-performance flexible electronics and wearable systems.","PeriodicalId":228,"journal":{"name":"Small","volume":"2 1","pages":"e08878"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3-d Element Induced Charge Redistribution Within Bimetallic η-Phase Carbides Leads to High Performance Electrocatalysts for Highly Efficient Anion Exchange Membrane Water Electrolysis. 双金属η相碳化物内三维元素诱导电荷重分布为高效阴离子交换膜电解提供了高性能电催化剂。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202511280

Tzu-Hsiang Lin,Yu-Chieh Ting,Chiung-Wen Chang,Shao-I Chang,Kai-An Lee,Tsung-Wei Hsueh,Kun-Han Lin,Shih-Yuan Lu

{"title":"3-d Element Induced Charge Redistribution Within Bimetallic η-Phase Carbides Leads to High Performance Electrocatalysts for Highly Efficient Anion Exchange Membrane Water Electrolysis.","authors":"Tzu-Hsiang Lin,Yu-Chieh Ting,Chiung-Wen Chang,Shao-I Chang,Kai-An Lee,Tsung-Wei Hsueh,Kun-Han Lin,Shih-Yuan Lu","doi":"10.1002/smll.202511280","DOIUrl":"https://doi.org/10.1002/smll.202511280","url":null,"abstract":"Cost-effective, highly efficient, and robust electrocatalysts are critical for prevailing of anion exchange membrane water electrolysis technology for green hydrogen production. Here, Ni and Fe are incorporated into tungsten carbides to form bimetallic η-phase carbides Ni6W6C and Fe6W6C, respectively, achieving remarkably low overpotentials of 37/204 and 203/296 mV at current densities of 10/500 mA cm-2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, in 1 m KOH. With Ni6W6C and Fe6W6C serving as the cathode and anode catalysts, respectively, the anion exchange membrane water electrolyzer exhibits outstanding water electrolysis performances, achieving an ultrahigh current density of 2.8 A cm-2 at 2 V and exhibiting ultra-stability of a continuous operation at a commercially relevant high current density of 0.5 A cm-2 for 100 h without appreciable decay. Incorporation of Ni in Ni6W6C induces charge redistribution between Ni and W, leading to an upshift in hydrogen adsorption energy to near-ideal value of zero and a downshift in hydrogen desorption energy for fast release of hydrogen, both contributing to the high HER activities of Ni6W6C. In situ surface reconstruction of Fe6W6C to highly OER-active (Fe,W)OOH during OER operations gives rise to high OER activities of Fe6W6C.","PeriodicalId":228,"journal":{"name":"Small","volume":"37 1","pages":"e11280"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green and Scalable Synthesis of Metal-Organic Framework via a Two-Stage Crystallization Approach. 绿色和可扩展的金属-有机骨架合成的两阶段结晶法。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202509238

Jinqiu Yuan,Hanbang Liu,Haiwei Wei,Junhui Guo,Yujing Chen,Anjie Wang,Wenfu Yan,Chang Liu,Shaozhong Peng,Zhongyi Jiang

{"title":"Green and Scalable Synthesis of Metal-Organic Framework via a Two-Stage Crystallization Approach.","authors":"Jinqiu Yuan,Hanbang Liu,Haiwei Wei,Junhui Guo,Yujing Chen,Anjie Wang,Wenfu Yan,Chang Liu,Shaozhong Peng,Zhongyi Jiang","doi":"10.1002/smll.202509238","DOIUrl":"https://doi.org/10.1002/smll.202509238","url":null,"abstract":"Green synthesis of metal-organic framework (MOF) is urgently demanded to enable scalable manufacturing and practical applications. However, the current one-step approaches typically require prolonged energy input or involvement of organic-solvent conditions for MOF crystallization. Herein, a two-stage crystallization approach is reported that yields high-quality MOF in water with just 5 min of energy input. In the first stage, nucleation is triggered mechanochemically, where 5 min of water-assisted milling generates a critical partially ordered intermediate. In the second stage, crystal growth proceeds solely via an in situ standing process under ambient conditions, during which the intermediate spontaneously transforms and grows into a crystalline framework, as observed by in situ characterization. Moreover, the aqueous ambient conditions promote thermodynamically controlled crystal growth, thereby yielding MOF with uniform morphology, high crystallinity, and a surface area of up to 1376 m2 g-1. Furthermore, this approach is successfully scaled to 100 g quantities, and the resulting scale-up MOF shows strong potential for practical CO2 adsorption applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"65 1","pages":"e09238"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Decoupling Half-Process Assisted Mitochondrial Transplantation via Self-Stripping pHLIP Boosts Macrophages Reprogramming for Inflammation Resolution. 解耦半过程辅助线粒体移植通过自剥离philips促进巨噬细胞重编程炎症解决。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202507970

Ping He,Xianghao Wu,Mingzheng Li,Kehao Liu,Yang Chen,Qianyu Zhang,Huaiyi Cheng,Yuzhou Li,Sheng Yang

{"title":"Decoupling Half-Process Assisted Mitochondrial Transplantation via Self-Stripping pHLIP Boosts Macrophages Reprogramming for Inflammation Resolution.","authors":"Ping He,Xianghao Wu,Mingzheng Li,Kehao Liu,Yang Chen,Qianyu Zhang,Huaiyi Cheng,Yuzhou Li,Sheng Yang","doi":"10.1002/smll.202507970","DOIUrl":"https://doi.org/10.1002/smll.202507970","url":null,"abstract":"Exogenous mitochondrial transplantation holds promise for reprogramming macrophages with mitochondrial dysfunction to alleviate inflammation, yet its efficacy is hindered by poor targeting, low efficiency, or functional interference and cytotoxicity of modifiers. Herein, a convenient pH-low insertion peptides (pHLIPs)-tailored mitochondrial \"decoupling transplantation\" strategy (pHLIPs-PEG-TPP-Mito; PPT-Mito) is reported. In the first half, PPT-Mito can actively target the acidic cell surface of pro-inflammatory macrophages (M1) boosted by acid-sensitive pHLIPs. Subsequently, the PPT components spontaneously insert into the acidic cell membrane and self-stripped from PPT-Mito without additional intervention. This spatiotemporal separation of boosters from organelles facilitates \"native\" mitochondrial transplantation, while avoiding potential interference of boosters in the second half. This method significantly increases transplantation efficiency in M1 macrophages, as evidenced by a 230% increase compared to anti-inflammatory macrophages (M2)/PPT-Mito and 208% relative to M1/Mito. Consequently, PPT-Mito effectively promotes the reprogramming of M1 macrophages into M2 macrophages by remodeling energy metabolism and restoring mitochondrial function, ultimately inhibiting the inflammatory response both in vitro and in a model of periodontal inflammation. Overall, this study presents an ingenious and straightforward decoupling half-process-assisted strategy for mitochondrial transplantation, with broad potential for applications in the delivery of biological micro-organelles.","PeriodicalId":228,"journal":{"name":"Small","volume":"1 1","pages":"e07970"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Rate Rechargeable Li/SOCl2 Batteries Enabled by Cobalt Phthalocyanine Cathodic Catalysts. 酞菁钴阴极催化剂制备高倍率可充电Li/SOCl2电池

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202508061

Yingxuan Song,Haibo Ouyang,Zhanwei Xu,Zeyang Zhang,Kang Li,Jianfeng Huang,Zhi Li,Tian Wang,Jun Yang

{"title":"High-Rate Rechargeable Li/SOCl2 Batteries Enabled by Cobalt Phthalocyanine Cathodic Catalysts.","authors":"Yingxuan Song,Haibo Ouyang,Zhanwei Xu,Zeyang Zhang,Kang Li,Jianfeng Huang,Zhi Li,Tian Wang,Jun Yang","doi":"10.1002/smll.202508061","DOIUrl":"https://doi.org/10.1002/smll.202508061","url":null,"abstract":"Rechargeable lithium/thionyl chloride (Li/SOCl2) batteries are considered promising alternatives to lithium-ion batteries because of their ultrahigh energy density and wide operating temperature range. However, current rechargeable Li/SOCl2 batteries exhibit unsatisfactory rate performance that originates from the poor reversibility of SOCl2 and is dominated by the difficulty in oxidizing the discharge product lithium chloride (LiCl). In response to this issue, cobalt phthalocyanine (CoPc) is employed as a cathode catalyst to boost the oxidation kinetics of LiCl products and thus improve the reversibility of SOCl2 in rechargeable Li/SOCl2 batteries. The CoPc catalyst in the Li/SOCl2 batteries is found to not only promote the discharge reduction of SOCl2 but also remarkably accelerate the reversible charge transformation of LiCl products by lowering the chloride ions oxidation barrier. The CoPc-catalyzed Li/SOCl2 batteries deliver a high specific capacity of 800 mAh g-1 at a current density of 500 mA g-1, with a stable voltage plateau of 3.5 V over 200 cycles. Even at the ultrahigh current density of 5 mA cm-2, these batteries can still provide a reversible capacity of 1 mAh cm-2 over 250 cycles, demonstrating excellent rate performance.","PeriodicalId":228,"journal":{"name":"Small","volume":"31 1","pages":"e08061"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unlocking High-Rate Sodium Storage in NaFePO4 via Graphene-Driven Cross-Scale Structural Regulation. 通过石墨烯驱动的跨尺度结构调节解锁NaFePO4中的高速率钠储存。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202509063

Haoyu Wang,Xinyu Luo,Chen Yuan,Shiyuan Fan,Lihua Liu,Wenchao Peng,Yang Li,Qicheng Zhang,Xiaobin Fan

引用次数: 0

Thermal Field Management for Stress Releasing Toward Efficient, Scalable Perovskite Photovoltaics. 面向高效、可扩展钙钛矿光伏的应力释放热场管理。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202508529

Yuchen Song,Linjun Ye,Xin Wang,Lina Wang,Hongwei Zhang,Wenqin Li,Xueling Zhao,Wenda Shi,Lifei Chen

{"title":"Thermal Field Management for Stress Releasing Toward Efficient, Scalable Perovskite Photovoltaics.","authors":"Yuchen Song,Linjun Ye,Xin Wang,Lina Wang,Hongwei Zhang,Wenqin Li,Xueling Zhao,Wenda Shi,Lifei Chen","doi":"10.1002/smll.202508529","DOIUrl":"https://doi.org/10.1002/smll.202508529","url":null,"abstract":"Perovskite solar cells are considered a promising photovoltaic technology, however, thermal expansion mismatch in conventional solution-controlled bottom-up thermal annealing results in strain in the perovskite layer, which significantly impairs the photovoltaic performance and scale-up manufacturing. Herein, a uniform thermal field is proposed to release the stress of perovskite film by offering a gas-solid (GS) reaction and simultaneously annealing process. Through slowly evaporation and diffusion of formamidine iodide salts into lead iodide-film, the pure α-phase black FAPbI3-perovskite is formed, allowing for precise control of perovskite growth and residual strain relaxation. The oriented crystallization and reduced defects of perovskite films is also obtained by this thermal management, and thereby improves power conversion efficiency (PCE) of 23.58%, compared to the control device (22.77%), and with prolonged operational stability. Furthermore, the effectiveness of this approach is demonstrated by colorful tunability and large-area perovskite solar modules (PSMs) with an area of 859.1 cm2, reaching an enhanced PCE from 12.74% to 16.56%. This approach highlights the importance of thermal field regulation for stress-released perovskite films for their scalability.","PeriodicalId":228,"journal":{"name":"Small","volume":"18 1","pages":"e08529"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemically Anchored PbS-2PACz CQDs Inks for Scalable HTL in Narrow-Bandgap and All-Perovskite Tandem Solar Cells. 窄带隙和全钙钛矿串联太阳能电池中可扩展HTL的化学锚定PbS-2PACz CQDs油墨。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-27 DOI: 10.1002/smll.202505059

Seung Hwa Hong,Sangheon Lee,Sunwoo Kim,Jaegwan Jung,Doeun Shim,Eunhye Cho,Minwoo Jeong,Mahnmin Choi,Taewon Goo,Jugyoung Kim,Sang Jun Park,Meeree Kim,Jae Ryoung Lee,Gabeen Cho,Sangwook Lee,Yong-Hyun Kim,Dong Hoe Kim,Sohee Jeong

{"title":"Chemically Anchored PbS-2PACz CQDs Inks for Scalable HTL in Narrow-Bandgap and All-Perovskite Tandem Solar Cells.","authors":"Seung Hwa Hong,Sangheon Lee,Sunwoo Kim,Jaegwan Jung,Doeun Shim,Eunhye Cho,Minwoo Jeong,Mahnmin Choi,Taewon Goo,Jugyoung Kim,Sang Jun Park,Meeree Kim,Jae Ryoung Lee,Gabeen Cho,Sangwook Lee,Yong-Hyun Kim,Dong Hoe Kim,Sohee Jeong","doi":"10.1002/smll.202505059","DOIUrl":"https://doi.org/10.1002/smll.202505059","url":null,"abstract":"Mixed-metal narrow-bandgap (NBG) Sn-Pb perovskites are essential for achieving high-efficiency all-perovskite tandem solar cells (APTSCs). However, their single-junction performance is limited by interfacial recombination and inefficient charge extraction, due to non-uniform hole transport layers (HTLs). Here, PbS-2PACz colloidal quantum dots (CQDs) are synthesized, chemically anchoring [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz) onto PbS CQDs via solution-phase ligand exchange. The resulting PbS-2PACz CQD ink demonstrates excellent colloidal stability in weakly polar solvents and yields uniform, defect-suppressing films on perovskites. To further enhance the perovskite/HTL interface, an additional 2PACz treatment deepens the valence band (-5.60 eV), reduces trap density, and optimizes energy-level alignment. Consequently, NBG perovskite solar cells utilizing PbS-2PACz with additional 2PACz achieve power conversion efficiencies (PCEs) of 22.84% ± 0.55, exceeding devices using poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and 2PACz self-assembled monolayers (SAMs). Integrated into APTSCs with a 1.77 eV wide-bandgap top cell, PbS-2PACz achieves a PCE of 25.05% ± 0.41, significantly outperforming PEDOT:PSS-based tandems (21.60% ± 0.91). This work highlights PbS-2PACz as an effective HTL material that enhances hole extraction, reproducibility, and scalability for high-performance perovskite solar cells.","PeriodicalId":228,"journal":{"name":"Small","volume":"88 1","pages":"e05059"},"PeriodicalIF":13.3,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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