Pub Date : 2026-03-01Epub Date: 2026-01-23DOI: 10.1016/j.mattod.2026.103190
Hao Lu , Yuzhu Song , Feixiang Long , Yuanpeng Zhang , Hui Liu , Yonghao Yao , Lunhua He , Wen Yin , Naike Shi , Yuanji Xu , Jun Chen
Isotropic low thermal expansion (LTE) is highly sought after for practical applications but remains rare due to the strict symmetry constraints that typically restrict its occurrence to cubic systems. In this study, we overcome this limitation in the hexagonal Laves-phase TiFe2 by tailoring the microscopic magnetic structure through vanadium substitution at Fe sites. The resulting Ti(Fe0.85V0.15)2 compound exhibits nearly isotropic LTE within an intrinsically anisotropic hexagonal lattice, with thermal expansion anisotropy reduced by an order of magnitude relative to the parent compound. Comprehensive structural and magnetic characterizations, combined with first-principles calculations, reveal that non-uniform vanadium occupancy creates a heterogeneous local structure that disrupts magnetic frustration. This design triggers significant magnetovolume effects along different crystallographic directions, resulting in the observed near-isotropic LTE. Our work demonstrates that engineering the microscopic magnetic structure is a viable strategy for achieving isotropic physical properties in magnetic functional materials beyond cubic systems.
{"title":"Achieving near-isotropic low thermal expansion in anisotropic lattice via microscopic magnetic structure design","authors":"Hao Lu , Yuzhu Song , Feixiang Long , Yuanpeng Zhang , Hui Liu , Yonghao Yao , Lunhua He , Wen Yin , Naike Shi , Yuanji Xu , Jun Chen","doi":"10.1016/j.mattod.2026.103190","DOIUrl":"10.1016/j.mattod.2026.103190","url":null,"abstract":"<div><div>Isotropic low thermal expansion (LTE) is highly sought after for practical applications but remains rare due to the strict symmetry constraints that typically restrict its occurrence to cubic systems. In this study, we overcome this limitation in the hexagonal Laves-phase TiFe<sub>2</sub> by tailoring the microscopic magnetic structure through vanadium substitution at Fe sites. The resulting Ti(Fe<sub>0.85</sub>V<sub>0.15</sub>)<sub>2</sub> compound exhibits nearly isotropic LTE within an intrinsically anisotropic hexagonal lattice, with thermal expansion anisotropy reduced by an order of magnitude relative to the parent compound. Comprehensive structural and magnetic characterizations, combined with first-principles calculations, reveal that non-uniform vanadium occupancy creates a heterogeneous local structure that disrupts magnetic frustration. This design triggers significant magnetovolume effects along different crystallographic directions, resulting in the observed near-isotropic LTE. Our work demonstrates that engineering the microscopic magnetic structure is a viable strategy for achieving isotropic physical properties in magnetic functional materials beyond cubic systems.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"93 ","pages":"Article 103190"},"PeriodicalIF":22.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147400681","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}
Pub Date : 2026-03-01Epub Date: 2026-01-31DOI: 10.1016/j.mattod.2026.103197
Mengdi Fan , Guangda Wu , Fapeng Yu , Guodong Zhang , Jiayue Xu , Chun Wang , Xian Zhao
{"title":"Corrigendum to ““All three in one”: An excellent bismuth-based oxide hard X-ray detector unveiling ultra-high sensitivity, ultra-low dark current and ultra-low detection limit” [Mater. Today 89 (2025) 92–99]","authors":"Mengdi Fan , Guangda Wu , Fapeng Yu , Guodong Zhang , Jiayue Xu , Chun Wang , Xian Zhao","doi":"10.1016/j.mattod.2026.103197","DOIUrl":"10.1016/j.mattod.2026.103197","url":null,"abstract":"","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"93 ","pages":"Article 103197"},"PeriodicalIF":22.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147400244","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}
Pub Date : 2026-03-01Epub Date: 2026-01-31DOI: 10.1016/j.mattod.2026.103221
Yulu Hua, Di Li, Wenxu Yin, Jie Guo, Shuo Li, Yingtong Zhou, Xiaoyu Zhang, Weitao Zheng
Perovskite light-emitting diodes (PeLEDs) now rival incumbent emitters in efficiency at the laboratory scale, yet translating millimeter pixels into centimeter–decimeter panels expose a distinct set of bottlenecks: non-uniform film formation, current spreading limits in conductors, and constraints from encapsulation. This review maps how device physics changes with area, synthesizes progress across solution and vacuum deposition, and emphasizes the critical parameters governing film quality and device performances. Near-term opportunities include top-emission optics and tandem stacks, durable sky/deep-blue emission, and low-temperature processing for flexible light sources. Persistent bottlenecks include scalable, pre-metered manufacturing, damage-free patterning at fine pitch, and panel-level stability limited by current spreading in conductors and by encapsulation. Lab-to-fab checklist is provided, along with a manufacturing and sustainability assessment, charting a credible path from record devices to scalable, reliable PeLED panels.
{"title":"Large-area perovskite LEDs: From lab-scale pixels to scalable panels","authors":"Yulu Hua, Di Li, Wenxu Yin, Jie Guo, Shuo Li, Yingtong Zhou, Xiaoyu Zhang, Weitao Zheng","doi":"10.1016/j.mattod.2026.103221","DOIUrl":"10.1016/j.mattod.2026.103221","url":null,"abstract":"<div><div>Perovskite light-emitting diodes (PeLEDs) now rival incumbent emitters in efficiency at the laboratory scale, yet translating millimeter pixels into centimeter–decimeter panels expose a distinct set of bottlenecks: non-uniform film formation, current spreading limits in conductors, and constraints from encapsulation. This review maps how device physics changes with area, synthesizes progress across solution and vacuum deposition, and emphasizes the critical parameters governing film quality and device performances. Near-term opportunities include top-emission optics and tandem stacks, durable sky/deep-blue emission, and low-temperature processing for flexible light sources. Persistent bottlenecks include scalable, pre-metered manufacturing, damage-free patterning at fine pitch, and panel-level stability limited by current spreading in conductors and by encapsulation. Lab-to-fab checklist is provided, along with a manufacturing and sustainability assessment, charting a credible path from record devices to scalable, reliable PeLED panels.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"93 ","pages":"Article 103221"},"PeriodicalIF":22.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147400247","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}
Pub Date : 2026-03-01Epub Date: 2026-01-24DOI: 10.1016/j.mattod.2026.103193
Zheng Wang , Lin Lu , Jialin Meng , Tianyu Wang
Smart robotics technology aims to replicate humans’ core perceptual and motor capabilities while striving for superhuman performance in specific scenarios. Against the backdrop of deep integration of artificial intelligence and automation technologies, this field has emerged as a transformative core research direction. However, current issues under traditional computing architectures such as inefficient data processing excessive system energy consumption and high response latency have limited the large-scale application of smart robotics. Synaptic devices provide a viable pathway to break through these bottlenecks, endowing robots with human-like integrated sensing-memory-computing capabilities. As the key to smart robots’ ability to perceive external information biomimetic organs driven by synaptic devices not only functionally resemble biological organs more closely but also significantly reduce power consumption and enable tighter system integration. Therefore, this review focuses on biomimetic organs mimicking four fundamental biological sensory modalities including vision, tactile, auditory, and olfaction. It systematically summarizes their latest research progress with an emphasis on those empowered by synaptic devices. In the materials and structure section the optimal material and structural choices for constructing different types of biomimetic organs are clarified. Based on this cutting-edge research outcomes of biomimetic organs are presented with focused analysis of practical application scenarios. Considering the complexity of information in real-world applications a smart robot perception system equipped with synaptic device-based multimodal biomimetic organs and a neuromorphic hardware computing system serving as the brain of smart robots are subsequently proposed. Finally future research directions in this field are outlined and existing challenges are discussed.
{"title":"New horizons of bionic intelligence: synaptic devices facilitating the exploration and breakthroughs in smart robot technology","authors":"Zheng Wang , Lin Lu , Jialin Meng , Tianyu Wang","doi":"10.1016/j.mattod.2026.103193","DOIUrl":"10.1016/j.mattod.2026.103193","url":null,"abstract":"<div><div>Smart robotics technology aims to replicate humans’ core perceptual and motor capabilities while striving for superhuman performance in specific scenarios. Against the backdrop of deep integration of artificial intelligence and automation technologies, this field has emerged as a transformative core research direction. However, current issues under traditional computing architectures such as inefficient data processing excessive system energy consumption and high response latency have limited the large-scale application of smart robotics. Synaptic devices provide a viable pathway to break through these bottlenecks, endowing robots with human-like integrated sensing-memory-computing capabilities. As the key to smart robots’ ability to perceive external information biomimetic organs driven by synaptic devices not only functionally resemble biological organs more closely but also significantly reduce power consumption and enable tighter system integration. Therefore, this review focuses on biomimetic organs mimicking four fundamental biological sensory modalities including vision, tactile, auditory, and olfaction. It systematically summarizes their latest research progress with an emphasis on those empowered by synaptic devices. In the materials and structure section the optimal material and structural choices for constructing different types of biomimetic organs are clarified. Based on this cutting-edge research outcomes of biomimetic organs are presented with focused analysis of practical application scenarios. Considering the complexity of information in real-world applications a smart robot perception system equipped with synaptic device-based multimodal biomimetic organs and a neuromorphic hardware computing system serving as the brain of smart robots are subsequently proposed. Finally future research directions in this field are outlined and existing challenges are discussed.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"93 ","pages":"Article 103193"},"PeriodicalIF":22.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147400252","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}
Pub Date : 2026-03-01Epub Date: 2026-01-31DOI: 10.1016/j.mattod.2026.103210
Peibo Du , Kefan Zhang , Xiaoyan Li , Jinping Zhang , Min Song , Xin Dai , Javed Muhammad , Fengyan Ge , Qingguo Li , Zaisheng Cai
Passive daytime radiative cooling (PDRC) technology holds promise for reducing energy consumption and improving human thermal comfort. However, achieving efficient cooling under extreme environments such as thermal shock, fire exposure, and bacterial proliferation remains a formidable challenge. Inspired by natural coral, we proposed a safe-adaptive collaborative cooling design concept and fabricated a novel cellulose acetate-phytic acid-calcium(II) (CPC)-coated fabric that integrates Janus wettability, spectral selectivity, flame retardancy and antibacterial properties via an endogenous-water-driven phase separation strategy. The hierarchical CPC-coated fabric possesses splendid solar reflectance (96.5%), mid-infrared emittance(98.1%), and unidirectional moisture-wicking performance, triggering a cooling temperature of 12.9 ℃ and 17.1 ℃ in dry and sweaty state, respectively. Besides, the CPC-coated fabric shows excellent flame retardancy (limiting oxidation index (LOI) of 32% and peak of heat release rate (PHRR) of 58.1 W/g) and antibacterial performance (exceeding 99.9% against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus)). Furthermore, the CPC-coated fabric exhibits favourable UV resistance, biocompatibility, mechanical robustness, color scalability and washability. Given these first-class features, the CPC-coated may provide a new insight into developing advanced radiative cooling textiles.
{"title":"Coral-inspired passive radiative cooling textiles toward extreme environments","authors":"Peibo Du , Kefan Zhang , Xiaoyan Li , Jinping Zhang , Min Song , Xin Dai , Javed Muhammad , Fengyan Ge , Qingguo Li , Zaisheng Cai","doi":"10.1016/j.mattod.2026.103210","DOIUrl":"10.1016/j.mattod.2026.103210","url":null,"abstract":"<div><div>Passive daytime radiative cooling (PDRC) technology holds promise for reducing energy consumption and improving human thermal comfort. However, achieving efficient cooling under extreme environments such as thermal shock, fire exposure, and bacterial proliferation remains a formidable challenge. Inspired by natural coral, we proposed a safe-adaptive collaborative cooling design concept and fabricated a novel cellulose acetate-phytic acid-calcium(II) (CPC)-coated fabric that integrates Janus wettability, spectral selectivity, flame retardancy and antibacterial properties via an endogenous-water-driven phase separation strategy. The hierarchical CPC-coated fabric possesses splendid solar reflectance (96.5%), mid-infrared emittance(98.1%), and unidirectional moisture-wicking performance, triggering a cooling temperature of 12.9 ℃ and 17.1 ℃ in dry and sweaty state, respectively. Besides, the CPC-coated fabric shows excellent flame retardancy (limiting oxidation index (LOI) of 32% and peak of heat release rate (PHRR) of 58.1 W/g) and antibacterial performance (exceeding 99.9% against <em>Escherichia coli</em> (E. coli) and <em>Staphylococcus aureus</em> (S. aureus)). Furthermore, the CPC-coated fabric exhibits favourable UV resistance, biocompatibility, mechanical robustness, color scalability and washability. Given these first-class features, the CPC-coated may provide a new insight into developing advanced radiative cooling textiles.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"93 ","pages":"Article 103210"},"PeriodicalIF":22.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146090362","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}
Pub Date : 2026-01-01Epub Date: 2025-12-20DOI: 10.1016/j.mattod.2025.12.009
Sai Varun Sunkara , Sukriti Manna , Dario F. Zambrano , Brian C. Wyatt , Jacob Patenaude , Bethany G. Wright , Yuzi Liu , Subramanian Sankaranarayanan , Babak Anasori , Andreas Rosenkranz , Anirudha V. Sumant
The mechanical and tribological properties of MXene coatings have gained notable attention in recent years due to their promising friction and wear performance. However, the chemical stability of MXenes under tribo-mechanical stress, a critical factor for ensuring long-term reliable lubrication, remains largely unexplored. In this study, we investigate the tribological behavior of a multi-layer molybdenum-based carbide MXene (ordered double transition metal Mo2TiC2Tx), highlighting its exceptional performance as a solid lubricant in dry nitrogen atmosphere when sliding against a diamond-like carbon (DLC) counterface at macroscale. Our findings reveal sustained superlubricity, with an impressively low friction coefficient of 0.005, and remarkable wear rate (5.11x10-10 mm3 N−1 m−1) over a prolonged linear sliding distance of 86 km without any sign of failure, outperforming all previously tested MXenes and 2D materials under similar conditions. Comprehensive characterization, along with molecular dynamics simulations, reveals the formation of a carbon-rich tribolayer, enabled by the enhanced tribo-catalytic activity of Mo under tribo-mechanical stress, which facilitates prolonged superlubricity. The exceptional durability and superlubricious performance of Mo2TiC2Tx coatings with negligible wear pave the way for the development of more robust and catalytically active MXenes with extended wear life and offer a promising alternative to oil-based lubricants in tribology.
{"title":"Solid Lubricant Molybdenum Based MXene With Prolonged Macroscale Superlubricity","authors":"Sai Varun Sunkara , Sukriti Manna , Dario F. Zambrano , Brian C. Wyatt , Jacob Patenaude , Bethany G. Wright , Yuzi Liu , Subramanian Sankaranarayanan , Babak Anasori , Andreas Rosenkranz , Anirudha V. Sumant","doi":"10.1016/j.mattod.2025.12.009","DOIUrl":"10.1016/j.mattod.2025.12.009","url":null,"abstract":"<div><div>The mechanical and tribological properties of MXene coatings have gained notable attention in recent years due to their promising friction and wear performance. However, the chemical stability of MXenes under tribo-mechanical stress, a critical factor for ensuring long-term reliable lubrication, remains largely unexplored. In this study, we investigate the tribological behavior of a multi-layer molybdenum-based carbide MXene (ordered double transition metal Mo<sub>2</sub>TiC<sub>2</sub>T<em><sub>x</sub></em>), highlighting its exceptional performance as a solid lubricant in dry nitrogen atmosphere when sliding against a diamond-like carbon (DLC) counterface at macroscale. Our findings reveal sustained superlubricity, with an impressively low friction coefficient of 0.005, and remarkable wear rate (5.11x10<sup>-10</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup>) over a prolonged linear sliding distance of 86 km without any sign of failure, outperforming all previously tested MXenes and 2D materials under similar conditions. Comprehensive characterization, along with molecular dynamics simulations, reveals the formation of a carbon-rich tribolayer, enabled by the enhanced tribo-catalytic activity of Mo under tribo-mechanical stress, which facilitates prolonged superlubricity. The exceptional durability and superlubricious performance of Mo<sub>2</sub>TiC<sub>2</sub>T<em><sub>x</sub></em> coatings with negligible wear pave the way for the development of more robust and catalytically active MXenes with extended wear life and offer a promising alternative to oil-based lubricants in tribology.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"92 ","pages":"Pages 294-303"},"PeriodicalIF":22.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146015589","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}
Pub Date : 2026-01-01Epub Date: 2025-12-27DOI: 10.1016/j.mattod.2025.12.018
Wei Li , Da Liu , Ding Yuan , Porun Liu , Huakun Liu , Shixue Dou , Renbing Wu , Yuhai Dou
The increasing global energy demand and environmental challenges have highlighted the need for efficient, sustainable energy conversion technologies, particularly those involving the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). These reactions are crucial for electrochemical devices like water splitting, fuel cells and metal-air batteries, but their high overpotentials and energy requirements limit widespread application. Noble metal catalysts, though effective, are costly and scarce, prompting interest in transition metal alternatives. Anion vacancy engineering has shown promise in enhancing these catalysts’ performance. This review covers recent advancements in anion vacancy engineering for OER and ORR electrocatalysis, discussing fundamental mechanisms, strategies for creating anion vacancies (e.g., solution etching, plasma treatment), advanced characterization techniques (e.g., EPR, PAS, XPS), and how anion vacancies enhance catalytic performance through optimizing intermediate adsorption/desorption, improving metal-support interactions, facilitating catalyst reconstruction and so on. Challenges remain in precisely controlling anion vacancy synthesis, scaling up production, and understanding real-time structural changes in vacancy-rich catalysts. Future research should focus on novel synthesis techniques, in situ characterization methods, and leveraging machine learning to optimize these catalysts. This review aims to guide the development of efficient, sustainable energy conversion technologies using vacancy-engineered electrocatalysts.
{"title":"Optimizing oxygen evolution/reduction reaction processes via anion vacancy engineering","authors":"Wei Li , Da Liu , Ding Yuan , Porun Liu , Huakun Liu , Shixue Dou , Renbing Wu , Yuhai Dou","doi":"10.1016/j.mattod.2025.12.018","DOIUrl":"10.1016/j.mattod.2025.12.018","url":null,"abstract":"<div><div>The increasing global energy demand and environmental challenges have highlighted the need for efficient, sustainable energy conversion technologies, particularly those involving the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). These reactions are crucial for electrochemical devices like water splitting, fuel cells and metal-air batteries, but their high overpotentials and energy requirements limit widespread application. Noble metal catalysts, though effective, are costly and scarce, prompting interest in transition metal alternatives. Anion vacancy engineering has shown promise in enhancing these catalysts’ performance. This review covers recent advancements in anion vacancy engineering for OER and ORR electrocatalysis, discussing fundamental mechanisms, strategies for creating anion vacancies (e.g., solution etching, plasma treatment), advanced characterization techniques (e.g., EPR, PAS, XPS), and how anion vacancies enhance catalytic performance through optimizing intermediate adsorption/desorption, improving metal-support interactions, facilitating catalyst reconstruction and so on. Challenges remain in precisely controlling anion vacancy synthesis, scaling up production, and understanding real-time structural changes in vacancy-rich catalysts. Future research should focus on novel synthesis techniques, in situ characterization methods, and leveraging machine learning to optimize these catalysts. This review aims to guide the development of efficient, sustainable energy conversion technologies using vacancy-engineered electrocatalysts.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"92 ","pages":"Pages 801-827"},"PeriodicalIF":22.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146015643","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}
Pub Date : 2026-01-01Epub Date: 2025-12-30DOI: 10.1016/j.mattod.2025.12.012
Haiping Luo , Shenglan Zhou , Wenjie Deng , Jiahao Liu , Jiaqing Peng , Bo Li , Zhihua Xiong , Wei Wang , Xinyu Ye
Fe3+ is a promising near-infrared (NIR) activator ion due to its tunable emission and non-toxicity, which has attracted growing interest. However, developing high-performance broadband NIR-emitting phosphors based on Fe3+ remains a significant challenge. In this work, we present Fe3+-activated A2LuSbO6 (A = Ba/Sr/Ca) double perovskite phosphors, which exhibit unusually long-wavelength NIR emission (>850 nm). By adopting a cation substitution strategy at the A-site, we designed the gradual replacement of large-radius ions with small-radius ions, achieving controllable tuning of emission from 847 nm to 937 nm. This substitution process simultaneously reduces structural symmetry and induces octahedral distortion, which breaks the spin-forbidden transition of Fe3+ and enhances luminescence performance. However, the continuous emission redshift leads to a large Stokes shift, which suppresses Fe3+ luminescence. The combined effect of these two factors results in optimal luminescence efficiency in Sr2LuSbO6:1.0 %Fe3+ (SLSO) sample, with internal/external quantum efficiencies (IQE/EQE) of 94.8 %/54.5 %. To further enhance luminescence performance, we introduced the rare-earth Yb3+, establishing an efficient Fe3+→Yb3+ energy transfer (ET) channel that reduces non-radiative transition losses. Compared with the Yb3+-free sample, the SLSO:1.0 %Fe3+, 3.0 %Yb3+ sample exhibits a broadened FWHM from 115 nm to 180 nm, enhanced IQE and EQE of 98.1 % and 56.4 %, respectively, and 13 % improved thermal stability. Finally, a pc-LED device based on the SLSO:1.0 %Fe3+, 3.0 %Yb3+ phosphor demonstrates potential for applications in NIR spectroscopy analysis, night vision, biomedical imaging, and other fields. This work lays a foundation for further research on strategies to regulation the optical properties of Fe3+-activated NIR phosphors.
{"title":"Boosting internal quantum efficiency to near-unity in Fe3+-doped NIR phosphors: Structural engineering and energy transfer in A2LuSbO6 (A = Ba/Sr/Ca) double perovskites","authors":"Haiping Luo , Shenglan Zhou , Wenjie Deng , Jiahao Liu , Jiaqing Peng , Bo Li , Zhihua Xiong , Wei Wang , Xinyu Ye","doi":"10.1016/j.mattod.2025.12.012","DOIUrl":"10.1016/j.mattod.2025.12.012","url":null,"abstract":"<div><div>Fe<sup>3+</sup> is a promising near-infrared (NIR) activator ion due to its tunable emission and non-toxicity, which has attracted growing interest. However, developing high-performance broadband NIR-emitting phosphors based on Fe<sup>3+</sup> remains a significant challenge. In this work, we present Fe<sup>3+</sup>-activated A<sub>2</sub>LuSbO<sub>6</sub> (A = Ba/Sr/Ca) double perovskite phosphors, which exhibit unusually long-wavelength NIR emission (>850 nm). By adopting a cation substitution strategy at the A-site, we designed the gradual replacement of large-radius ions with small-radius ions, achieving controllable tuning of emission from 847 nm to 937 nm. This substitution process simultaneously reduces structural symmetry and induces octahedral distortion, which breaks the spin-forbidden transition of Fe<sup>3+</sup> and enhances luminescence performance. However, the continuous emission redshift leads to a large Stokes shift, which suppresses Fe<sup>3+</sup> luminescence. The combined effect of these two factors results in optimal luminescence efficiency in Sr<sub>2</sub>LuSbO<sub>6</sub>:1.0 %Fe<sup>3+</sup> (SLSO) sample, with internal/external quantum efficiencies (IQE/EQE) of 94.8 %/54.5 %. To further enhance luminescence performance, we introduced the rare-earth Yb<sup>3+</sup>, establishing an efficient Fe<sup>3+</sup>→Yb<sup>3+</sup> energy transfer (ET) channel that reduces non-radiative transition losses. Compared with the Yb<sup>3+</sup>-free sample, the SLSO:1.0 %Fe<sup>3+</sup>, 3.0 %Yb<sup>3+</sup> sample exhibits a broadened FWHM from 115 nm to 180 nm, enhanced IQE and EQE of 98.1 % and 56.4 %, respectively, and 13 % improved thermal stability. Finally, a pc-LED device based on the SLSO:1.0 %Fe<sup>3+</sup>, 3.0 %Yb<sup>3+</sup> phosphor demonstrates potential for applications in NIR spectroscopy analysis, night vision, biomedical imaging, and other fields. This work lays a foundation for further research on strategies to regulation the optical properties of Fe<sup>3+</sup>-activated NIR phosphors.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"92 ","pages":"Pages 315-325"},"PeriodicalIF":22.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146015705","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}
Pub Date : 2026-01-01Epub Date: 2025-12-25DOI: 10.1016/j.mattod.2025.12.013
Xinlong Li , Wanshan Gao , Hao Zheng , Zhiyun Dong , Xiaoyu Huang , Hanjiao Chen , Hong Chen , Jiaojiao Yang , Jun Luo , Jianshu Li
Inspired by the thermal hysteresis of honey, we report an atypical temperature‑responsive strategy to overcome the strength-switchability trade-off in underwater adhesives. By programming the reversible polymerization-crystallization of the natural small-molecule thioctic acid (TA) using a long-chain alkylated TA derivative as “molecular pollen” and tris(2-carboxyethyl)phosphine (TCEP) as a stabilizer, we designed a robust yet highly reversible underwater adhesive. Upon mild heating, TA polymerizes into a metastable polyTA complex stabilized by TCEP and plasticized by the molecular pollen, maintaining a supercooled fluid state even below its crystallization temperature to enable thorough underwater wetting. Cooling underwater triggers depolymerization, releasing TA monomers that co‑crystallize with the molecular pollen to induce complete solidification with high cohesion. This mild thermal cycling enables wide-range cohesion modulation, yielding robust underwater adhesion (2.21 MPa on steel within 24 h) and high switching efficiency (>99.9 %) within a narrow temperature window (ΔT ≤ 30 °C). With honey-like thermal hysteresis near body temperature, the adhesive provides secure wound sealing and stable catheter fixation (≥7 d) in vivo, followed by minimal-trauma removal with reduced inflammation under gentle thermal stimulation. This sustainable biomimetic strategy resolves the “switchability conflict” in underwater adhesives, with promising applicability in medical device fixation, wearable electronics, and reversible assembly.
{"title":"Honey-inspired thermally hysteretic adhesives for high strength and reversible underwater adhesion","authors":"Xinlong Li , Wanshan Gao , Hao Zheng , Zhiyun Dong , Xiaoyu Huang , Hanjiao Chen , Hong Chen , Jiaojiao Yang , Jun Luo , Jianshu Li","doi":"10.1016/j.mattod.2025.12.013","DOIUrl":"10.1016/j.mattod.2025.12.013","url":null,"abstract":"<div><div>Inspired by the thermal hysteresis of honey, we report an atypical temperature‑responsive strategy to overcome the strength-switchability trade-off in underwater adhesives. By programming the reversible polymerization-crystallization of the natural small-molecule thioctic acid (TA) using a long-chain alkylated TA derivative as “molecular pollen” and tris(2-carboxyethyl)phosphine (TCEP) as a stabilizer, we designed a robust yet highly reversible underwater adhesive. Upon mild heating, TA polymerizes into a metastable polyTA complex stabilized by TCEP and plasticized by the molecular pollen, maintaining a supercooled fluid state even below its crystallization temperature to enable thorough underwater wetting. Cooling underwater triggers depolymerization, releasing TA monomers that co‑crystallize with the molecular pollen to induce complete solidification with high cohesion. This mild thermal cycling enables wide-range cohesion modulation, yielding robust underwater adhesion (2.21 MPa on steel within 24 h) and high switching efficiency (>99.9 %) within a narrow temperature window (ΔT ≤ 30 °C). With honey-like thermal hysteresis near body temperature, the adhesive provides secure wound sealing and stable catheter fixation (≥7 d) <em>in vivo</em>, followed by minimal-trauma removal with reduced inflammation under gentle thermal stimulation. This sustainable biomimetic strategy resolves the “switchability conflict” in underwater adhesives, with promising applicability in medical device fixation, wearable electronics, and reversible assembly.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"92 ","pages":"Pages 326-338"},"PeriodicalIF":22.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016541","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}
Pub Date : 2026-01-01Epub Date: 2025-12-29DOI: 10.1016/j.mattod.2025.12.017
Sagnik Chowdhury , Keum-Jin Ko , Vinayak Vitthal Satale , Hyerin Kim , Sung-Ho Jin , Jae-Wook Kang
Inkjet printing offers a scalable and material-efficient route for fabricating organic light-emitting devices, yet solution-processed phosphorescent OLEDs (PHOLEDs) remain limited by interfacial instability, solvent incompatibility, and poor ambient processability. In this study, we report a high-performance, hole-transport layer (HTL)-free PHOLED fully fabricated under ambient conditions using an inkjet printing strategy based on eco-friendly solvents. A dual self-assembled monolayer (SAM) modification on the ITO anode, combining 2,3,4,5,6-pentafluorobenzoyl phosphonic acid and tricosafluorododecanoic acid, enables efficient charge injection without the need for conventional HTLs. Complementing this, a binary solvent system comprising environmentally benign components is engineered to suppress the coffee-ring effect and significantly improve film uniformity. Furthermore, a newly designed heteroleptic Ir(III) emitter with tailored solubilizing groups enhances ink compatibility and charge-transport properties. The resulting devices achieve a record-high external quantum efficiency of 16.8% under ambient processing conditions, marking a new benchmark for inkjet-printed PHOLEDs. This work demonstrates a synergistic approach to interfacial engineering and eco-conscious solvent design, offering a scalable, sustainable pathway toward high-efficiency, vacuum-free OLED technologies.
{"title":"Ambient inkjet-printed PHOLEDs with record efficiency via dual-SAM engineering and eco-friendly solvent design","authors":"Sagnik Chowdhury , Keum-Jin Ko , Vinayak Vitthal Satale , Hyerin Kim , Sung-Ho Jin , Jae-Wook Kang","doi":"10.1016/j.mattod.2025.12.017","DOIUrl":"10.1016/j.mattod.2025.12.017","url":null,"abstract":"<div><div>Inkjet printing offers a scalable and material-efficient route for fabricating organic light-emitting devices, yet solution-processed phosphorescent OLEDs (PHOLEDs) remain limited by interfacial instability, solvent incompatibility, and poor ambient processability. In this study, we report a high-performance, hole-transport layer (HTL)-free PHOLED fully fabricated under ambient conditions using an inkjet printing strategy based on eco-friendly solvents. A dual self-assembled monolayer (SAM) modification on the ITO anode, combining 2,3,4,5,6-pentafluorobenzoyl phosphonic acid and tricosafluorododecanoic acid, enables efficient charge injection without the need for conventional HTLs. Complementing this, a binary solvent system comprising environmentally benign components is engineered to suppress the coffee-ring effect and significantly improve film uniformity. Furthermore, a newly designed heteroleptic Ir(III) emitter with tailored solubilizing groups enhances ink compatibility and charge-transport properties. The resulting devices achieve a record-high external quantum efficiency of 16.8% under ambient processing conditions, marking a new benchmark for inkjet-printed PHOLEDs. This work demonstrates a synergistic approach to interfacial engineering and eco-conscious solvent design, offering a scalable, sustainable pathway toward high-efficiency, vacuum-free OLED technologies.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"92 ","pages":"Pages 347-357"},"PeriodicalIF":22.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016574","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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