Yuhao Guo, Jiaqi Hu, Jiawen Qin, Qinhui Guan, Jing Li, Bao Pan, Na Li, Tingjiang Yan
Frustrated Lewis pairs (FLPs) have attracted extensive attention in heterogeneous catalysis due to their distinctive ability to efficiently dissociate small molecules and accelerate reaction kinetics, yet challenges remain for low-cost large-scale applications. Herein, FLPs are first successfully fabricated in low-cost silicate minerals, with the inherent surface hydroxyl groups (-OH) of the latter serving as Lewis base (LB) sites. Simultaneously, H2-mediated deoxygenation induces oxygen vacancies (OV), modulating the electronic states of adjacent Zn sites and transforms them into Lewis acid (LA) sites. Density functional theory (DFT) calculations are carried out to elucidate the optimal spatial distance between LA and LB sites and the charge transfer behavior, thereby furnishing atomic-scale insights into the effective construction of FLPs. Coupled with in-situ H2 characterizations, the efficient dissociation of H2 into H+ and H− is directly visualized, thus affording abundant active hydrogen species for the subsequent reaction. Furthermore, FLPs can serve as shallow energy levels to facilitate the separation and migration of photogenerated carriers. The CO formation rate in photocatalytic reaction of the Zn2SiO4 catalyst modified with FLPs is 2.3-fold higher than that of the pristine FLPs-free Zn2SiO4 catalyst. This work provides a strategy for FLPs in low-cost silicate minerals facilitating photocatalytic CO2 hydrogenation.
{"title":"Construction of Frustrated Lewis Pairs in Low-Cost Silicate Minerals via H2-Mediated Oxygen Vacancy Engineering for Efficient Photocatalytic CO2 Hydrogenation","authors":"Yuhao Guo, Jiaqi Hu, Jiawen Qin, Qinhui Guan, Jing Li, Bao Pan, Na Li, Tingjiang Yan","doi":"10.1002/adfm.74420","DOIUrl":"https://doi.org/10.1002/adfm.74420","url":null,"abstract":"Frustrated Lewis pairs (FLPs) have attracted extensive attention in heterogeneous catalysis due to their distinctive ability to efficiently dissociate small molecules and accelerate reaction kinetics, yet challenges remain for low-cost large-scale applications. Herein, FLPs are first successfully fabricated in low-cost silicate minerals, with the inherent surface hydroxyl groups (-OH) of the latter serving as Lewis base (LB) sites. Simultaneously, H<sub>2</sub>-mediated deoxygenation induces oxygen vacancies (O<sub>V</sub>), modulating the electronic states of adjacent Zn sites and transforms them into Lewis acid (LA) sites. Density functional theory (DFT) calculations are carried out to elucidate the optimal spatial distance between LA and LB sites and the charge transfer behavior, thereby furnishing atomic-scale insights into the effective construction of FLPs. Coupled with in-situ H<sub>2</sub> characterizations, the efficient dissociation of H<sub>2</sub> into H<sup>+</sup> and H<sup>−</sup> is directly visualized, thus affording abundant active hydrogen species for the subsequent reaction. Furthermore, FLPs can serve as shallow energy levels to facilitate the separation and migration of photogenerated carriers. The CO formation rate in photocatalytic reaction of the Zn<sub>2</sub>SiO<sub>4</sub> catalyst modified with FLPs is 2.3-fold higher than that of the pristine FLPs-free Zn<sub>2</sub>SiO<sub>4</sub> catalyst. This work provides a strategy for FLPs in low-cost silicate minerals facilitating photocatalytic CO<sub>2</sub> hydrogenation.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"384 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146129246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The artwork depicts a copper-based cavity-networked structure (mountain) with a catalytic interface (river) facilitating CO2-to-ethylene conversion. The butterfly pea flowers at the base symbolize the bioinspired microstructure of Clitoria ternatea leaves, integrating natural aesthetics with advanced catalytic engineering. More information can be found in the Research Article by Qikui Fan, Jian Yang, Chuncai Kong, and co-workers (10.1002/adfm.202520743).
{"title":"Cavity-Networked Copper Nanocatalysts with Acid-Tolerant Microenvironments for Efficient CO2 Electroreduction to Ethylene (Adv. Funct. Mater. 11/2026)","authors":"Zhongshuang Xu, Qikui Fan, Huanran Miao, Xinwei Zhang, Hongyu Zhang, Xi Cao, Pengxu Yan, Xiai Zhang, Zhimao Yang, Jian Yang, Chuncai Kong","doi":"10.1002/adfm.73799","DOIUrl":"https://doi.org/10.1002/adfm.73799","url":null,"abstract":"<p><b>Copper Nanocatalysts</b></p><p>The artwork depicts a copper-based cavity-networked structure (mountain) with a catalytic interface (river) facilitating CO<sub>2</sub>-to-ethylene conversion. The butterfly pea flowers at the base symbolize the bioinspired microstructure of <i>Clitoria ternatea</i> leaves, integrating natural aesthetics with advanced catalytic engineering. More information can be found in the Research Article by Qikui Fan, Jian Yang, Chuncai Kong, and co-workers (10.1002/adfm.202520743).\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"36 11","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.73799","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146139384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Transition metal chalcogenides have been considered as one kind of the most potential candidate catalysts for oxygen evolution reaction (OER). However, the inevitable sulfur loss during reconstruction process destructs the chemical and electronic structure of catalysts. Herein, we proposed directional metal element migration to fix sulfur on near-surface region, and evaluated the effect of lattice oxygen compensation on the stability of surface sulfur. Besides, an ‘etching-compensation factor’ of lattice oxygen is defined as a descriptor on the OER stability with coupled O─O as the key intermediates. It is found that the migration of Fe and S in opposite directions enables high voltage-dependent reversibility of Ni─O─Fe units during OER for self-healing of electrode. The further produced full gradient NiFe-sulfide electrode can stably work for more than 50 000 CV cycles at the scan rate of 50 mV s−1, and 800 h of chronopotentiometric at current density of 100 mA cm−2.
过渡金属硫族化合物被认为是一种最有潜力的析氧反应候选催化剂。然而，在重构过程中不可避免的硫损失破坏了催化剂的化学和电子结构。为此，我们提出了金属元素定向迁移将硫固定在近表面区域，并评估了晶格氧补偿对表面硫稳定性的影响。此外，还定义了晶格氧的“蚀刻补偿因子”作为描述OER稳定性的描述符，并将耦合O─O作为关键中间体。发现Fe和S在相反方向的迁移使Ni─O─Fe单元在OER过程中具有高电压依赖性的可逆性，从而实现电极的自愈。进一步制备的全梯度硫化镍电极可以在50 mV s−1的扫描速率下稳定工作5万CV以上，在100 mA cm−2的电流密度下稳定工作800 h。
{"title":"Directional Elements Migration in Bulkphase Promoting Surface Sulfur Fixation for Highly Stable Water Splitting","authors":"Yanyan Zhang, Wangyang Li, Zhichao Hou, Junrong Jiao, Xun Kang, Chengyu Wei, Qianfeng Xia, Yong Zhao, Xiaobing Wang","doi":"10.1002/adfm.202527147","DOIUrl":"https://doi.org/10.1002/adfm.202527147","url":null,"abstract":"Transition metal chalcogenides have been considered as one kind of the most potential candidate catalysts for oxygen evolution reaction (OER). However, the inevitable sulfur loss during reconstruction process destructs the chemical and electronic structure of catalysts. Herein, we proposed directional metal element migration to fix sulfur on near-surface region, and evaluated the effect of lattice oxygen compensation on the stability of surface sulfur. Besides, an ‘etching-compensation factor’ of lattice oxygen is defined as a descriptor on the OER stability with coupled O─O as the key intermediates. It is found that the migration of Fe and S in opposite directions enables high voltage-dependent reversibility of Ni─O─Fe units during OER for self-healing of electrode. The further produced full gradient NiFe-sulfide electrode can stably work for more than 50 000 CV cycles at the scan rate of 50 mV s<sup>−1</sup>, and 800 h of chronopotentiometric at current density of 100 mA cm<sup>−2</sup>.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"34 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiyoung Shin, Gyeong Min Lee, Juyeon Shin, Jaewoong Kim, Tae Hyuk Kim, Do Yeon Kim, Myeong In Kim, Kyeounghak Kim, Jae Won Shim, In Hwan Jung
Phosphonic acid (PA)-based self-assembled monolayer (SAM) materials have emerged as promising hole transport materials (HTMs) for photodiodes such as organic/perovskite solar cells and photodetectors. In this study, we reveal for the first time that triphenylamine (TPA)-based PA-type SAMs spontaneously form zwitterionic structures, which are key in strengthening the binding strength of the anchoring group on the ITO surface and enhancing interfacial adhesion. The electrostatic interaction of the zwitterion induced a strong interfacial dipole, dramatically increasing the work function (WF) to 5.33 eV (0.28 eV higher than the control). Notably, TPA does not function merely as an electron-donating group, but rather as a strong Brønsted base. DFT calculations confirmed that zwitterion formation is energetically favorable and crucial for WF modulation. Thus, zwitterionic SAMs in near-infrared organic photodetectors effectively improve hole extraction and suppress dark current density through their dual functionality of hole transporting and electron blocking. The optimized devices achieved remarkably low dark current density (1.41 × 10−9 A/cm2) and noise current (2.8 × 10−14 A), combined with high responsivity (0.496 A/W) and specific detectivity (3.78 × 1012 Jones) at −0.1 V. This study highlights the potential of zwitterionic structures as HTMs and offers a powerful molecular design strategy for SAM-type HTMs.
{"title":"Zwitterionic Self-Assembled Monolayer for Simultaneous Noise Suppression and Hole Extraction in High-Performance Near-Infrared Organic Photodetectors","authors":"Jiyoung Shin, Gyeong Min Lee, Juyeon Shin, Jaewoong Kim, Tae Hyuk Kim, Do Yeon Kim, Myeong In Kim, Kyeounghak Kim, Jae Won Shim, In Hwan Jung","doi":"10.1002/adfm.202524099","DOIUrl":"https://doi.org/10.1002/adfm.202524099","url":null,"abstract":"Phosphonic acid (PA)-based self-assembled monolayer (SAM) materials have emerged as promising hole transport materials (HTMs) for photodiodes such as organic/perovskite solar cells and photodetectors. In this study, we reveal for the first time that triphenylamine (TPA)-based PA-type SAMs spontaneously form zwitterionic structures, which are key in strengthening the binding strength of the anchoring group on the ITO surface and enhancing interfacial adhesion. The electrostatic interaction of the zwitterion induced a strong interfacial dipole, dramatically increasing the work function (WF) to 5.33 eV (0.28 eV higher than the control). Notably, TPA does not function merely as an electron-donating group, but rather as a strong Brønsted base. DFT calculations confirmed that zwitterion formation is energetically favorable and crucial for WF modulation. Thus, zwitterionic SAMs in near-infrared organic photodetectors effectively improve hole extraction and suppress dark current density through their dual functionality of hole transporting and electron blocking. The optimized devices achieved remarkably low dark current density (1.41 × 10<sup>−9</sup> A/cm<sup>2</sup>) and noise current (2.8 × 10<sup>−14</sup> A), combined with high responsivity (0.496 A/W) and specific detectivity (3.78 × 10<sup>12</sup> Jones) at −0.1 V. This study highlights the potential of zwitterionic structures as HTMs and offers a powerful molecular design strategy for SAM-type HTMs.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"28 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ji Soo Lim, Carmine Autieri, Merit Spring, Martin Kamp, Amar Fakhredine, Pavel Potapov, Daniel Wolf, Sergii Pylypenko, Axel Lubk, Johannes Schultz, Nicolas Perez, Börge Mehlhorn, Louis Veyrat, Mario Cuoco, Fadi Choueikan, Philippe Ohresser, Bernd Büchner, Giorgio Sangiovanni, Ralph Claessen, Michael Sing
Magnetic materials with strong spin-orbit coupling (SOC) are essential for the advancement of spin-orbitronic devices, as they enable efficient spin-charge conversion, complex magnetic structures, spin-valley physics, topological phases and other exotic phenomena. 5d transition-metal oxides such as SrIrO3 feature large SOC, but usually show paramagnetic behavior due to broad bands and a low density of states at the Fermi level, accompanied by a relatively low Coulomb repulsion. Here, we unveil ferromagnetism in 5d SrIrO3 thin films grown on SrTiO3 (111). Through substrate-induced structural engineering, a zigzag stacking of three-unit-cell thick layers along the [111] direction is achieved, stabilizing a ferromagnetic state at the interfaces. Magnetotransport measurements reveal an anomalous Hall effect below ∼30 K and hysteresis in the Hall conductivity below 7 K, indicating ferromagnetic ordering. X-ray magnetic circular dichroism further supports these results. Theoretical analysis suggests that the structural engineering of the IrO6 octahedral network enhances the density of states at the Fermi level and thus stabilizes Stoner ferromagnetism. This work highlights the potential of structurally engineered 5d oxides for spin-orbitronic devices, where efficient control of SOC-induced magnetic phases by electric currents can lead to lower energy consumption and improved performance in next-generation device technologies.
{"title":"Inducing Ferromagnetism by Structural Engineering in a Strongly Spin-Orbit Coupled Oxide","authors":"Ji Soo Lim, Carmine Autieri, Merit Spring, Martin Kamp, Amar Fakhredine, Pavel Potapov, Daniel Wolf, Sergii Pylypenko, Axel Lubk, Johannes Schultz, Nicolas Perez, Börge Mehlhorn, Louis Veyrat, Mario Cuoco, Fadi Choueikan, Philippe Ohresser, Bernd Büchner, Giorgio Sangiovanni, Ralph Claessen, Michael Sing","doi":"10.1002/adfm.202600032","DOIUrl":"https://doi.org/10.1002/adfm.202600032","url":null,"abstract":"Magnetic materials with strong spin-orbit coupling (SOC) are essential for the advancement of spin-orbitronic devices, as they enable efficient spin-charge conversion, complex magnetic structures, spin-valley physics, topological phases and other exotic phenomena. 5d transition-metal oxides such as SrIrO<sub>3</sub> feature large SOC, but usually show paramagnetic behavior due to broad bands and a low density of states at the Fermi level, accompanied by a relatively low Coulomb repulsion. Here, we unveil ferromagnetism in 5d SrIrO<sub>3</sub> thin films grown on SrTiO<sub>3</sub> (111). Through substrate-induced structural engineering, a zigzag stacking of three-unit-cell thick layers along the [111] direction is achieved, stabilizing a ferromagnetic state at the interfaces. Magnetotransport measurements reveal an anomalous Hall effect below ∼30 K and hysteresis in the Hall conductivity below 7 K, indicating ferromagnetic ordering. X-ray magnetic circular dichroism further supports these results. Theoretical analysis suggests that the structural engineering of the IrO<sub>6</sub> octahedral network enhances the density of states at the Fermi level and thus stabilizes Stoner ferromagnetism. This work highlights the potential of structurally engineered 5d oxides for spin-orbitronic devices, where efficient control of SOC-induced magnetic phases by electric currents can lead to lower energy consumption and improved performance in next-generation device technologies.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"89 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jeng-Hun Lee, Kang Hyuk Cho, Seojin Yun, Siyoung Lee, Woongji Kim, Yunsik Kim, Wonkyu Moon, Yoonyoung Chung, Kilwon Cho
Growing interest has been devoted to developing soft sensors capable of detecting mechano-acoustic signals, as many vital physiological signals manifest as broadband cues beyond quasi-static regimes. Electrospun nanomeshes (NMs) have emerged as promising candidates due to their lightweight structure, superior flexibility, and efficient mechanoelectrical conversion. However, current NM-based sensors relying on piezoelectric or triboelectric mechanisms suffer from non-flat frequency responses, nonlinear sensitivities, and large form factors. Here, a soft polyvinylidene fluoride (PVDF) NM-based capacitive sensor is presented that overcomes these limitations. Distinct from conventional NM designs, the PVDF NM functions as the diaphragm in a capacitive sensor, self-generating the bias voltage required for its operation. This capacitive architecture enables substantial miniaturization, while the porous NM structure improves air permeability and reduces air damping. The resulting sensor delivers a flat frequency response (80–3000 Hz), high linear sensitivity (313 mV g−1), and an ultracompact size (0.25 cm2), offering exceptional performance across key metrics. Its soft, skin-conformal design allows seamless adhesion to the neck for accurate detection of broadband physiological signals—including voice and coughs—positioning it as a promising platform for voice-driven IoT, human–machine interfaces, and mobile healthcare.
{"title":"Miniature Nanomesh Mechano-Acoustic Sensor with Wide Linear Dynamic Range, Broad Bandwidth, and Flat Frequency Response","authors":"Jeng-Hun Lee, Kang Hyuk Cho, Seojin Yun, Siyoung Lee, Woongji Kim, Yunsik Kim, Wonkyu Moon, Yoonyoung Chung, Kilwon Cho","doi":"10.1002/adfm.202513535","DOIUrl":"https://doi.org/10.1002/adfm.202513535","url":null,"abstract":"Growing interest has been devoted to developing soft sensors capable of detecting mechano-acoustic signals, as many vital physiological signals manifest as broadband cues beyond quasi-static regimes. Electrospun nanomeshes (NMs) have emerged as promising candidates due to their lightweight structure, superior flexibility, and efficient mechanoelectrical conversion. However, current NM-based sensors relying on piezoelectric or triboelectric mechanisms suffer from non-flat frequency responses, nonlinear sensitivities, and large form factors. Here, a soft polyvinylidene fluoride (PVDF) NM-based capacitive sensor is presented that overcomes these limitations. Distinct from conventional NM designs, the PVDF NM functions as the diaphragm in a capacitive sensor, self-generating the bias voltage required for its operation. This capacitive architecture enables substantial miniaturization, while the porous NM structure improves air permeability and reduces air damping. The resulting sensor delivers a flat frequency response (80–3000 Hz), high linear sensitivity (313 mV <i>g</i><sup>−1</sup>), and an ultracompact size (0.25 cm<sup>2</sup>), offering exceptional performance across key metrics. Its soft, skin-conformal design allows seamless adhesion to the neck for accurate detection of broadband physiological signals—including voice and coughs—positioning it as a promising platform for voice-driven IoT, human–machine interfaces, and mobile healthcare.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"5 6 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Defects and non-ideal energy level alignment at the perovskite/electron transport layer (ETL) interface in inverted perovskite solar cells (PSCs) severely limit open-circuit voltage (VOC) and fill factor (FF), thereby restricting further performance improvements in perovskite/silicon tandem solar cells. To address this, we designed and synthesized two ammonium salt-derived molecules, ZFI-1 and ZFI-2, with distinct spatial configurations of functional groups, for synergistic passivation with PEABr at the perovskite interface. By strategically modulating the spatial arrangement of carbonyl, fluorine, and amino groups, these molecules enhance multi-modal coordination capabilities with defect sites in perovskite. The results demonstrate that ZFI molecules effectively suppress the formation of 2D perovskite phases, improve film crystallinity, modulate the interfacial work function, optimize energy level alignment and electron extraction, and significantly inhibit non-radiative recombination, thereby reducing VOC and FF losses. The wide-bandgap perovskite single-junction device based on ZFI-2/PEABr synergistic passivation achieved a champion power conversion efficiency (PCE) of 23.45% with a VOC of 1.271 V. Notably, this strategy demonstrated universal applicability in perovskite/silicon tandem cells, attaining a tandem PCE of 31.56%, offering a novel design pathway for interface engineering in high-performance perovskite photovoltaic devices.
{"title":"Synergistic Passivation via Spatial Configuration Engineering of Ammonium Salts for High-Efficiency Tandem Perovskite Solar Cells","authors":"Jie Deng, Huiyao Zhao, Wenfeng Zhang, Jinlei Xu, Hongjie Wan, Dongyong Fan, Yuchen Luo, Ze Li, Huaisong Yong, Wei Long, Yifeng Zhang, Yuchao Hu, Guoqiang Xing, Yingguo Yang, Haijin Li, Shangfeng Yang","doi":"10.1002/adfm.202529984","DOIUrl":"https://doi.org/10.1002/adfm.202529984","url":null,"abstract":"Defects and non-ideal energy level alignment at the perovskite/electron transport layer (ETL) interface in inverted perovskite solar cells (PSCs) severely limit open-circuit voltage (V<sub>OC</sub>) and fill factor (FF), thereby restricting further performance improvements in perovskite/silicon tandem solar cells. To address this, we designed and synthesized two ammonium salt-derived molecules, ZFI-1 and ZFI-2, with distinct spatial configurations of functional groups, for synergistic passivation with PEABr at the perovskite interface. By strategically modulating the spatial arrangement of carbonyl, fluorine, and amino groups, these molecules enhance multi-modal coordination capabilities with defect sites in perovskite. The results demonstrate that ZFI molecules effectively suppress the formation of 2D perovskite phases, improve film crystallinity, modulate the interfacial work function, optimize energy level alignment and electron extraction, and significantly inhibit non-radiative recombination, thereby reducing V<sub>OC</sub> and FF losses. The wide-bandgap perovskite single-junction device based on ZFI-2/PEABr synergistic passivation achieved a champion power conversion efficiency (PCE) of 23.45% with a V<sub>OC</sub> of 1.271 V. Notably, this strategy demonstrated universal applicability in perovskite/silicon tandem cells, attaining a tandem PCE of 31.56%, offering a novel design pathway for interface engineering in high-performance perovskite photovoltaic devices.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"25 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Owing to their unique crystal structures, van der Waals (vdW) materials provide a versatile platform for exploring emergent physical phenomena and enabling next-generation electronic and spintronic applications. However, the direct correlations between vdW crystal and intrinsic properties, such as magnetism, remain largely unexplored. Here, we demonstrate that a variety of structure-correlated topological spin textures, characterized by highly regular shapes ranging from triangles to octagons and arranged in periodic patterns, can be induced in vdW crystals. Owing to their well-resolved boundaries, the entire evolution of the quasiparticle characteristics of the topological structures, including creation, structural distortions, and collision were unambiguously revealed. More importantly, it was found that the topological annihilation occurs in an explosive manner, providing direct confirmation of the quasiparticle nature at the scale of a single magnetic unit. Simulations reveal that their formation arises from the interplay between uniaxial anisotropy and dipolar interactions, further modulated by the lattice background. These findings uncover a previously unrecognized structure-property relationship in vdW magnets and open avenues for designing and tunning of new topological spin textures.
{"title":"Lattice-Driven Topological Spin Textures in Cr2Ge2Te6 Single Crystals","authors":"Shuai Dong, Caihong Xie, Yuying Bai, Aile Wang, Zihao Li, Xuan Luo, Yuping Sun, Li Pi, Mangyuan Ma, Yongcheng Deng, Wenjie Meng, Wei Tong, Yubin Hou, Yalin Lu, Fu-Hua Sun, Qingyou Lu, Qiyuan Feng","doi":"10.1002/adfm.74354","DOIUrl":"https://doi.org/10.1002/adfm.74354","url":null,"abstract":"Owing to their unique crystal structures, van der Waals (vdW) materials provide a versatile platform for exploring emergent physical phenomena and enabling next-generation electronic and spintronic applications. However, the direct correlations between vdW crystal and intrinsic properties, such as magnetism, remain largely unexplored. Here, we demonstrate that a variety of structure-correlated topological spin textures, characterized by highly regular shapes ranging from triangles to octagons and arranged in periodic patterns, can be induced in vdW crystals. Owing to their well-resolved boundaries, the entire evolution of the quasiparticle characteristics of the topological structures, including creation, structural distortions, and collision were unambiguously revealed. More importantly, it was found that the topological annihilation occurs in an explosive manner, providing direct confirmation of the quasiparticle nature at the scale of a single magnetic unit. Simulations reveal that their formation arises from the interplay between uniaxial anisotropy and dipolar interactions, further modulated by the lattice background. These findings uncover a previously unrecognized structure-property relationship in vdW magnets and open avenues for designing and tunning of new topological spin textures.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"126 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146129245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This cover illustrates a unit-cell-thick metal–organic framework (MOF) film in which aligned pores guide light hydrogen molecules while rejecting larger molecules. The work demonstrates the scalable growth of defect-suppressed MOF films and reveals that controlled crystallization enables MOF thin membranes to deliver high-flux, molecularly selective gas separations. More information can be found in the Research Article by Kumar Varoon Agrawal and co-workers (10.1002/adfm.202525243).
超薄金属-有机框架膜
{"title":"Uniform In-Plane Growth of Large-Area Ultrathin Zn2(benzimidazole)4 Membrane (Adv. Funct. Mater. 11/2026)","authors":"Shuqing Song, Ceren Kocaman, Annal Baisil, Jian Hao, Shaoyu Wang, Kumar Varoon Agrawal","doi":"10.1002/adfm.73800","DOIUrl":"10.1002/adfm.73800","url":null,"abstract":"<p><b>Ultrathin Metal-Organic Framework Membranes</b></p><p>This cover illustrates a unit-cell-thick metal–organic framework (MOF) film in which aligned pores guide light hydrogen molecules while rejecting larger molecules. The work demonstrates the scalable growth of defect-suppressed MOF films and reveals that controlled crystallization enables MOF thin membranes to deliver high-flux, molecularly selective gas separations. More information can be found in the Research Article by Kumar Varoon Agrawal and co-workers (10.1002/adfm.202525243).\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"36 11","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.73800","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiaxin Wu, Shiqi Yu, Zhenyu Luo, Zheng Zou, Junjie Zhou, Tingting Cui, Le Huang, Wei Zhang, Yi Liu, Liangang Xiao, Yonggang Min
Formamidinium lead triiodide (FAPbI3) is a leading candidate for high-performance perovskite solar cells (PSCs) because of its near-ideal bandgap and excellent thermal stability. However, its practical development is still limited by challenges in crystallization control and phase stability. While compositional engineering strategies often broaden optical bandgap and introduce heterogeneity, additive strategies offer a promising alternative for optimizing perovskite properties. In this study, a series of novel fluoropyridine derivatives are introduced as additives into the precursor solution for fabricating FAPbI3-based PSCs. Among them, 3,5-difluoropyridine (DFPy) additive effectively modulates the crystallization process, yielding perovskite films with reduced defect density, suppressed non-radiative recombination, and enhanced phase stability. The corresponding devices achieved the highest performance, with the optimized inverted PSCs delivering a champion power conversion efficiency (PCE) of nearly 26% along with a JSC of 25.77 mA cm−2, a VOC of 1.18 V, and an FF of 85.62%. Furthermore, the DFPy modified devices exhibit significantly enhanced humidity and thermal stability, attributed to the superior film quality. This study establishes a new additive paradigm for fabricating efficient and stable FAPbI3-based PSCs, paving the way for further exploration of pyridine-derived additives in high-performance perovskite photovoltaics.
三碘化甲醛铅（FAPbI3）由于其接近理想的带隙和优异的热稳定性而成为高性能钙钛矿太阳能电池（PSCs）的主要候选材料。然而，它的实际发展仍然受到结晶控制和相稳定性方面的挑战。虽然复合材料工程策略通常会扩大光带隙并引入非均质性，但添加剂策略为优化钙钛矿性能提供了有希望的替代方案。本研究将一系列新型氟吡啶衍生物作为添加剂引入到制备fapbi3基PSCs的前驱体溶液中。其中，3,5-二氟吡啶（DFPy）添加剂可有效调节结晶过程，生成缺陷密度降低、非辐射复合抑制、相稳定性增强的钙钛矿薄膜。相应的器件实现了最高的性能，优化后的倒置PSCs提供了近26%的领先功率转换效率（PCE）， JSC为25.77 mA cm−2，VOC为1.18 V， FF为85.62%。此外，由于优越的薄膜质量，DFPy修饰的器件表现出显著增强的湿度和热稳定性。本研究为制备高效稳定的fapbi3基PSCs建立了新的添加剂范式，为进一步探索吡啶衍生添加剂在高性能钙钛矿光伏电池中的应用铺平了道路。
{"title":"Approaching 26% Efficiency in Inverted FAPbI3 Perovskite Solar Cells Enabled by Tailored Fluoropyridine Derivative Additives","authors":"Jiaxin Wu, Shiqi Yu, Zhenyu Luo, Zheng Zou, Junjie Zhou, Tingting Cui, Le Huang, Wei Zhang, Yi Liu, Liangang Xiao, Yonggang Min","doi":"10.1002/adfm.202526679","DOIUrl":"https://doi.org/10.1002/adfm.202526679","url":null,"abstract":"Formamidinium lead triiodide (FAPbI<sub>3</sub>) is a leading candidate for high-performance perovskite solar cells (PSCs) because of its near-ideal bandgap and excellent thermal stability. However, its practical development is still limited by challenges in crystallization control and phase stability. While compositional engineering strategies often broaden optical bandgap and introduce heterogeneity, additive strategies offer a promising alternative for optimizing perovskite properties. In this study, a series of novel fluoropyridine derivatives are introduced as additives into the precursor solution for fabricating FAPbI<sub>3</sub>-based PSCs. Among them, 3,5-difluoropyridine (DFPy) additive effectively modulates the crystallization process, yielding perovskite films with reduced defect density, suppressed non-radiative recombination, and enhanced phase stability. The corresponding devices achieved the highest performance, with the optimized inverted PSCs delivering a champion power conversion efficiency (PCE) of nearly 26% along with a <i>J</i><sub>SC</sub> of 25.77 mA cm<sup>−2</sup>, a <i>V</i><sub>OC</sub> of 1.18 V, and an FF of 85.62%. Furthermore, the DFPy modified devices exhibit significantly enhanced humidity and thermal stability, attributed to the superior film quality. This study establishes a new additive paradigm for fabricating efficient and stable FAPbI<sub>3</sub>-based PSCs, paving the way for further exploration of pyridine-derived additives in high-performance perovskite photovoltaics.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"90 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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