Platinum is widely used in the important components in most electrochemical energy conversion systems while as a noble metal it faces the inevitable challenge of limited reserves. Herein, porous single–crystalline (PSC) molybdenum nitride (MoN) monoliths are reported at the centimeter scale that surpass platinum for all–pH hydrogen evolution. Free–standing PSC MoN electrode with the pore size of ≈6 nm and porosity of ≈72% present both noble–metal–like electronic structure and unsaturated Mo─N coordination structures at surface, contributing to remarkably high intrinsic electrocatalytic activity. The unprecedented overpotentials of as low as 13 and 11 mV are presented at the geometrical current density of 10 mA cm−2 for hydrogen evolution in H2SO4 (pH 0) and KOH (pH 14) media, respectively, which is dramatically superior to commercial Pt electrodes. As a result of the structural stability, the outstanding long–term durability for all pH hydrogen evolution is demonstrated without visible degradation in a continuous operation for 300 h.
{"title":"Porous Single-Crystalline Molybdenum Nitride Monoliths at the Centimeter Scale Surpass Platinum for all pH Hydrogen Evolution","authors":"Shaobo Xi, Cong Luo, Kui Xie","doi":"10.1002/adma.202502583","DOIUrl":"https://doi.org/10.1002/adma.202502583","url":null,"abstract":"Platinum is widely used in the important components in most electrochemical energy conversion systems while as a noble metal it faces the inevitable challenge of limited reserves. Herein, porous single–crystalline (PSC) molybdenum nitride (MoN) monoliths are reported at the centimeter scale that surpass platinum for all–pH hydrogen evolution. Free–standing PSC MoN electrode with the pore size of ≈6 nm and porosity of ≈72% present both noble–metal–like electronic structure and unsaturated Mo─N coordination structures at surface, contributing to remarkably high intrinsic electrocatalytic activity. The unprecedented overpotentials of as low as 13 and 11 mV are presented at the geometrical current density of 10 mA cm<sup>−2</sup> for hydrogen evolution in H<sub>2</sub>SO<sub>4</sub> (pH 0) and KOH (pH 14) media, respectively, which is dramatically superior to commercial Pt electrodes. As a result of the structural stability, the outstanding long–term durability for all pH hydrogen evolution is demonstrated without visible degradation in a continuous operation for 300 h.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"39 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820060","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}
Reducing heterointerface nonradiative recombination is a key challenge for realizing highly efficient perovskite solar cells (PSCs). Motivated by this, a facile strategy is developed via interfacial energetics reversal to functionalize perovskite heterointerface. A surfactant molecule, trichloro[3-(pentafluorophenyl)propyl]silane (TPFS) reverses perovskite surface energetics from intrinsic n-type to p-type, evidently demonstrated by ultraviolet and inverse photoelectron spectroscopies. The reconstructed perovskite surface energetics match well with the upper deposited hole transport layer, realizing an exquisite energy level alignment for accelerating hole extraction across the heterointerface. Meanwhile, TPFS further diminishes surface defect density. As a result, this cooperative strategy leads to greatly minimized nonradiative recombination. PSCs achieve an impressive power conversion efficiency of 25.9% with excellent reproducibility, and a nonradiative recombination-induced qVoc loss of only 57 meV, which is the smallest reported to date in n-i-p structured PSCs.
减少异质界面非辐射重组是实现高效包晶太阳能电池(PSCs)的关键挑战。受此启发,我们开发了一种通过界面能量反转使包晶石异质界面功能化的简便策略。一种表面活性剂分子--三氯[3-(五氟苯基)丙基]硅烷(TPFS)可将过氧化物表面能量从固有的 n 型逆转为 p 型,紫外光谱和反向光电子能谱对此进行了证明。重建后的包晶表面能级与上部沉积的空穴传输层非常吻合,实现了精致的能级排列,从而加速了空穴在异质界面上的萃取。同时,TPFS 进一步降低了表面缺陷密度。因此,这种合作策略大大减少了非辐射重组。PSCs 的功率转换效率达到了令人印象深刻的 25.9%,而且具有极佳的可重复性,非辐射重组引起的 qVoc 损耗仅为 57 meV,是迄今为止报道的 ni-p 结构 PSCs 中最小的。
{"title":"Interfacial Energetics Reversal Strategy for Efficient Perovskite Solar Cells","authors":"Sheng Jiang, Shaobing Xiong, Zhongcheng Yuan, Yafang Li, Xiaomeng You, Hongbo Wu, Menghui Jia, Zhennan Lin, Zaifei Ma, Yuning Wu, Yefeng Yao, Xianjie Liu, Junhao Chu, Zhenrong Sun, Mats Fahlman, Henry J. Snaith, Qinye Bao","doi":"10.1002/adma.202503110","DOIUrl":"https://doi.org/10.1002/adma.202503110","url":null,"abstract":"Reducing heterointerface nonradiative recombination is a key challenge for realizing highly efficient perovskite solar cells (PSCs). Motivated by this, a facile strategy is developed via interfacial energetics reversal to functionalize perovskite heterointerface. A surfactant molecule, trichloro[3-(pentafluorophenyl)propyl]silane (TPFS) reverses perovskite surface energetics from intrinsic n-type to p-type, evidently demonstrated by ultraviolet and inverse photoelectron spectroscopies. The reconstructed perovskite surface energetics match well with the upper deposited hole transport layer, realizing an exquisite energy level alignment for accelerating hole extraction across the heterointerface. Meanwhile, TPFS further diminishes surface defect density. As a result, this cooperative strategy leads to greatly minimized nonradiative recombination. PSCs achieve an impressive power conversion efficiency of 25.9% with excellent reproducibility, and a nonradiative recombination-induced <i>qV</i><sub>oc</sub> loss of only 57 meV, which is the smallest reported to date in <i>n-i-p</i> structured PSCs.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"59 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820062","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}
Chengming Zhang, Wanqing Su, Jianan Sun, Yi Man, Ying Wei, Chunbo Duan, Chunmiao Han, Hui Xu
The bottleneck in efficiency stability at high luminance limits the development of thermally activated delayed fluorescence (TADF) diodes, due to the insufficient management of quenching factors, especially exciton-phonon coupling during reverse intersystem crossing (RISC) assistant with vibrational coupling. Herein, this challenge is overcome by a TADF sensitizer based “energy transfer loop” strategy. A dimethylacridine-phosphole oxide hybrid sensitizer named 24DDMACPPPO is constructed with vibration-free RISC and excited-state energy levels equal to a TADF emitter 4CzTPNBu. The former displaces the latter in RISC for phonon decoupling through reverse triplet and positive singlet energy transfer between them. As a result, co-doping 0 .1%wt. 24DDMACPPPO doubles the RISC rate constant and triples the singlet radiation rate of 4CzTPNBu, and simultaneously nearly halves non-radiation rate constants, giving rise to 70% and 90% increased photo- and electro-luminescence quantum efficiencies of 4CzTPNBu. More importantly, the energy transfer loop between 24DDMACPPPO and 4CzTPNBu combines their advantages in RISC, quenching suppression, and singlet radiation, giving rise to the record values of external quantum efficiency (≈23%wt.) and roll-off (2.6%) at 104 cd m−2.
{"title":"Energy Transfer Loop Enables Thermally Activated Delayed Fluorescence with >20% EQE and Near-Zero Roll-Offs at 104 Nits","authors":"Chengming Zhang, Wanqing Su, Jianan Sun, Yi Man, Ying Wei, Chunbo Duan, Chunmiao Han, Hui Xu","doi":"10.1002/adma.202502747","DOIUrl":"https://doi.org/10.1002/adma.202502747","url":null,"abstract":"The bottleneck in efficiency stability at high luminance limits the development of thermally activated delayed fluorescence (TADF) diodes, due to the insufficient management of quenching factors, especially exciton-phonon coupling during reverse intersystem crossing (RISC) assistant with vibrational coupling. Herein, this challenge is overcome by a TADF sensitizer based “energy transfer loop” strategy. A dimethylacridine-phosphole oxide hybrid sensitizer named 24DDMACPPPO is constructed with vibration-free RISC and excited-state energy levels equal to a TADF emitter 4CzTPNBu. The former displaces the latter in RISC for phonon decoupling through reverse triplet and positive singlet energy transfer between them. As a result, co-doping 0 .1%wt. 24DDMACPPPO doubles the RISC rate constant and triples the singlet radiation rate of 4CzTPNBu, and simultaneously nearly halves non-radiation rate constants, giving rise to 70% and 90% increased photo- and electro-luminescence quantum efficiencies of 4CzTPNBu. More importantly, the energy transfer loop between 24DDMACPPPO and 4CzTPNBu combines their advantages in RISC, quenching suppression, and singlet radiation, giving rise to the record values of external quantum efficiency (≈23%wt.) and roll-off (2.6%) at 10<sup>4</sup> cd m<sup>−2</sup>.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"74 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820063","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}
Multiferroic materials, characterized by the coexisting of ferroelectric polarization (breaking space- inversion symmetry, 𝒫) and magnetism (breaking time-reversal symmetry, 𝒯), with strong magnetoelectric coupling, are highly sought after for advanced technological applications. Novel altermagnets, distinct from conventional magnets, have recently been revealed to exhibit unique spin polarization protected by crystal symmetry, which naturally overcomes the isolation of magnetism from ferroelectrics associated with spatial symmetry. In this study, a novel class of type-III multiferroics is proposed, which leverages the unique symmetry of altermagnets to enforce spin-ferroelectric locking, setting them apart from conventional multiferroics. Through first-principles calculations, ferroelectric switching is shown to fully invert the spin polarization of altermagnets, equivalent to a 180° reversal of magnetic spin. This altermagnetic phase controlled by ferroelectrics can be effectively probed using the magneto-optical Kerr effect, revealing a new class of multiferroics with intrinsic and deterministic magnetoelectric coupling. This theoretical advancement redefines the design principles of magnetoelectric materials and lays the foundation for the design of next-generation spintronic devices leveraging altermagnetism.
多铁性材料的特点是铁电极化(打破空间反转对称性,𝒫)和磁性(打破时间反转对称性,𝒯)共存,并具有很强的磁电耦合,在先进技术应用中备受追捧。最近发现,有别于传统磁体的新型变磁体在晶体对称性的保护下表现出独特的自旋极化,这自然克服了与空间对称性相关的磁性与铁电的隔离。本研究提出了一类新型的 III 型多铁氧体,它利用改性磁体的独特对称性实现了自旋-铁电锁定,使其有别于传统的多铁氧体。通过第一原理计算,铁电转换可完全反转变磁体的自旋极化,相当于磁自旋的 180° 反转。利用磁光克尔效应可以有效地探测这种由铁电控制的改磁相,从而揭示了一类具有内在确定性磁电耦合的新型多铁氧体。这一理论进展重新定义了磁电材料的设计原理,为利用变磁性设计下一代自旋电子器件奠定了基础。
{"title":"Proposing Altermagnetic-Ferroelectric Type-III Multiferroics with Robust Magnetoelectric Coupling","authors":"Wei Sun, Changhong Yang, Wenxuan Wang, Ying Liu, Xiaotian Wang, Shifeng Huang, Zhenxiang Cheng","doi":"10.1002/adma.202502575","DOIUrl":"https://doi.org/10.1002/adma.202502575","url":null,"abstract":"Multiferroic materials, characterized by the coexisting of ferroelectric polarization (breaking space- inversion symmetry, 𝒫) and magnetism (breaking time-reversal symmetry, 𝒯), with strong magnetoelectric coupling, are highly sought after for advanced technological applications. Novel altermagnets, distinct from conventional magnets, have recently been revealed to exhibit unique spin polarization protected by crystal symmetry, which naturally overcomes the isolation of magnetism from ferroelectrics associated with spatial symmetry. In this study, a novel class of type-III multiferroics is proposed, which leverages the unique symmetry of altermagnets to enforce spin-ferroelectric locking, setting them apart from conventional multiferroics. Through first-principles calculations, ferroelectric switching is shown to fully invert the spin polarization of altermagnets, equivalent to a 180° reversal of magnetic spin. This altermagnetic phase controlled by ferroelectrics can be effectively probed using the magneto-optical Kerr effect, revealing a new class of multiferroics with intrinsic and deterministic magnetoelectric coupling. This theoretical advancement redefines the design principles of magnetoelectric materials and lays the foundation for the design of next-generation spintronic devices leveraging altermagnetism.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"33 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820064","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}
Taehyun Park, Juhyung Seo, Namju Kim, Chaehyun Kim, Yeong Jae Kim, Hyeonghun Kim, Hyun Ho Kim, Seyong Oh, Dong Chan Kim, Donghee Son, Jaehyun Hur, Young-Joon Kim, Byung Chul Jang, Hocheon Yoo
True Random Number Generator
In article number 2419579, Hocheon Yoo and co-workers present arc discharge light-induced true random number generator (ALTRNG), using a bipolar photo-responsive photodetector to generate random bits through unpredictable arc discharge illumination. Validated by 15 National Institute of Standards and Technology (NIST) tests, ALTRNG produces highly random bit streams and, with a 2-kbps readout circuit, enables wireless random number transmission for secure password systems and artificial X-ray imaging.
{"title":"Rolling the Dice with Light Competition: Introducing a True Random Number Generator Powered by Photo-Induced Polarity Current (Adv. Mater. 14/2025)","authors":"Taehyun Park, Juhyung Seo, Namju Kim, Chaehyun Kim, Yeong Jae Kim, Hyeonghun Kim, Hyun Ho Kim, Seyong Oh, Dong Chan Kim, Donghee Son, Jaehyun Hur, Young-Joon Kim, Byung Chul Jang, Hocheon Yoo","doi":"10.1002/adma.202570109","DOIUrl":"https://doi.org/10.1002/adma.202570109","url":null,"abstract":"<p><b>True Random Number Generator</b></p><p>In article number 2419579, Hocheon Yoo and co-workers present arc discharge light-induced true random number generator (ALTRNG), using a bipolar photo-responsive photodetector to generate random bits through unpredictable arc discharge illumination. Validated by 15 National Institute of Standards and Technology (NIST) tests, ALTRNG produces highly random bit streams and, with a 2-kbps readout circuit, enables wireless random number transmission for secure password systems and artificial X-ray imaging.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"37 14","pages":""},"PeriodicalIF":27.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adma.202570109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809638","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}
Despite the reported high efficiencies of small-area perovskite photovoltaic cells, the deficiency in large-area modules has impeded the commercialization of perovskite photovoltaics. Enhancing the surface/interface conductivity and carrier-transport in polycrystalline perovskite films presents significant potential for boosting the efficiency of perovskite solar modules (PSMs) by mitigating voltage losses. This is particularly critical for multi-series connected sub-cell modules, where device resistance significantly impacts performance compared to small-area cells. Here, an effective approach is reported for decreasing photovoltage loss through surface/interface modulation of perovskite film with a surface conductive coordination polymer. With post-treatment of meso-tetra pyridine porphyrin on perovskite film, PbI2 on perovskite film reacts with pyridine units in porphyrins to generate an iso-structural 2D coordination polymer with a layered surface conductivity as high as 1.14 × 102 S m−1, due to the effect of surface structure reconstruction. Modified perovskite film exhibits greatly increased surface/interface conductivity. The champion PSM obtains a record efficiency up to 23.39% (certified 22.63% with an aperture area of 11.42 cm2) featuring only 0.33-volt voltage loss. Such a modification also leads to substantially improved operational device stability.
{"title":"Achieving >23% Efficiency Perovskite Solar Minimodules with Surface Conductive Coordination Polymer","authors":"Guo-Bin Xiao, Zhen-Yang Suo, Xijiao Mu, Houen Wu, Runmin Dong, Fei Song, Xingyu Gao, Liming Ding, Yiying Wu, Jing Cao","doi":"10.1002/adma.202407225","DOIUrl":"https://doi.org/10.1002/adma.202407225","url":null,"abstract":"Despite the reported high efficiencies of small-area perovskite photovoltaic cells, the deficiency in large-area modules has impeded the commercialization of perovskite photovoltaics. Enhancing the surface/interface conductivity and carrier-transport in polycrystalline perovskite films presents significant potential for boosting the efficiency of perovskite solar modules (PSMs) by mitigating voltage losses. This is particularly critical for multi-series connected sub-cell modules, where device resistance significantly impacts performance compared to small-area cells. Here, an effective approach is reported for decreasing photovoltage loss through surface/interface modulation of perovskite film with a surface conductive coordination polymer. With post-treatment of meso-tetra pyridine porphyrin on perovskite film, PbI<sub>2</sub> on perovskite film reacts with pyridine units in porphyrins to generate an iso-structural 2D coordination polymer with a layered surface conductivity as high as 1.14 × 10<sup>2</sup> S m<sup>−1</sup>, due to the effect of surface structure reconstruction. Modified perovskite film exhibits greatly increased surface/interface conductivity. The champion PSM obtains a record efficiency up to 23.39% (certified 22.63% with an aperture area of 11.42 cm<sup>2</sup>) featuring only 0.33-volt voltage loss. Such a modification also leads to substantially improved operational device stability.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"75 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814316","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}
Sonocatalytic therapy is gaining interest for its non-invasive nature, precise control, and excellent tissue penetration, making it a promising approach for treating malignant tumors. While defect engineering enhances electron and hole separation to boost reactive oxygen species (ROS) generation, challenges in constructing effective hole traps compared to electron traps severely limit ROS production. In this study, 2D ZnIn2S4-VIn nanosheets enriched are rationally designed with In vacancies for the efficient capture of electrons and holes, which has achieved substantial sonocatalytic performance in suppressing tumor growth. Compared to pristine ZnIn2S4 nanosheets, which possess a periodic electrostatic potential inherent in their structure, In vacancies effectively disrupt this potential field, promote the simultaneous separation and migration of charge carriers, and inhibit their recombination, thereby boosting ROS production and inducing tumor cell pyroptosis via the ROS-NLRP3-caspase-1-GSDMD pathway under ultrasound (US) irradiation. Furthermore, both pristine ZnIn2S4 and ZnIn2S4-VIn nanosheets exhibited remarkable biocompatibility. In vitro and in vivo antineoplastic experiments demonstrate that this sonocatalytic approach effectively promotes tumor elimination, underscoring the critical importance of defect-engineered optimization in sonocatalytic tumor therapy.
{"title":"2D Indium-Vacancy-Rich ZnIn2S4 Nanocatalysts for Sonocatalytic Cancer Suppression by Boosting Cancer-Cell Pyroptosis","authors":"Zeyu Wang, Xue Wang, Hongsheng Fang, Xinran Song, Li Ding, Meiqi Chang, Hao Yan, Yu Chen","doi":"10.1002/adma.202414432","DOIUrl":"https://doi.org/10.1002/adma.202414432","url":null,"abstract":"Sonocatalytic therapy is gaining interest for its non-invasive nature, precise control, and excellent tissue penetration, making it a promising approach for treating malignant tumors. While defect engineering enhances electron and hole separation to boost reactive oxygen species (ROS) generation, challenges in constructing effective hole traps compared to electron traps severely limit ROS production. In this study, 2D ZnIn<sub>2</sub>S<sub>4</sub>-V<sub>In</sub> nanosheets enriched are rationally designed with In vacancies for the efficient capture of electrons and holes, which has achieved substantial sonocatalytic performance in suppressing tumor growth. Compared to pristine ZnIn<sub>2</sub>S<sub>4</sub> nanosheets, which possess a periodic electrostatic potential inherent in their structure, In vacancies effectively disrupt this potential field, promote the simultaneous separation and migration of charge carriers, and inhibit their recombination, thereby boosting ROS production and inducing tumor cell pyroptosis via the ROS-NLRP3-caspase-1-GSDMD pathway under ultrasound (US) irradiation. Furthermore, both pristine ZnIn<sub>2</sub>S<sub>4</sub> and ZnIn<sub>2</sub>S<sub>4</sub>-V<sub>In</sub> nanosheets exhibited remarkable biocompatibility. In vitro and in vivo antineoplastic experiments demonstrate that this sonocatalytic approach effectively promotes tumor elimination, underscoring the critical importance of defect-engineered optimization in sonocatalytic tumor therapy.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"108 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814318","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}
Cong Li, Yang Wang, Jianfeng Zhang, Guowei Liu, Hongxiong Liu, Wanyu Chen, Hanbin Deng, Wenbo Ma, Craig Polley, Balasubramanian Thiagarajan, Timur K. Kim, Jiaxin Yin, Youguo Shi, Tao Xiang, Oscar Tjernberg
Weyl Semimetal
n article number 2419559, Cong Li, Tao Xiang, Oscar Tjernberg, and co-workers provide a feasible experimental platform, the surface reconstructed Weyl semimetal, to incorporate non-Hermitian effects into condensed matter physics for the first time. The emergence of boundary non-Hermitian effects offers valuable insights into the abnormal anomalous Hall effect observed in the Weyl semimetal NdAlSi and suggests that the potential to modify the overall transport properties of topological materials through simple adjustments to their surface atomic arrangements.
{"title":"Non-Hermitian Boundary in a Surface Selective Reconstructed Magnetic Weyl Semimetal (Adv. Mater. 14/2025)","authors":"Cong Li, Yang Wang, Jianfeng Zhang, Guowei Liu, Hongxiong Liu, Wanyu Chen, Hanbin Deng, Wenbo Ma, Craig Polley, Balasubramanian Thiagarajan, Timur K. Kim, Jiaxin Yin, Youguo Shi, Tao Xiang, Oscar Tjernberg","doi":"10.1002/adma.202570111","DOIUrl":"https://doi.org/10.1002/adma.202570111","url":null,"abstract":"<p><b>Weyl Semimetal</b></p><p>n article number 2419559, Cong Li, Tao Xiang, Oscar Tjernberg, and co-workers provide a feasible experimental platform, the surface reconstructed Weyl semimetal, to incorporate non-Hermitian effects into condensed matter physics for the first time. The emergence of boundary non-Hermitian effects offers valuable insights into the abnormal anomalous Hall effect observed in the Weyl semimetal NdAlSi and suggests that the potential to modify the overall transport properties of topological materials through simple adjustments to their surface atomic arrangements.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"37 14","pages":""},"PeriodicalIF":27.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adma.202570111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809416","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}
Microparticle cathode materials are widely used in secondary batteries. However, obtaining dynamic chemical heterogeneities of these microparticles is challenging, hindering in-depth mechanistic investigation of the underlying processes. For example, although vanadium pentoxide shows promise as an electrode material for zinc ion batteries, its poor performance's root cause is elusive. Herein, a fluorescence/scattering dual-mode spinning disk confocal microscopy-based approach is developed to visualize the 4D chemical heterogeneity of single V2O5 particles during cycling. Dual-mode in situ imaging identifies valence state changes of vanadium ions with high spatiotemporal resolution. A unique difference is observed between the scattering intensities of a particle's bottom electric contact points and the rest parts during the discharging process. In contrast, fluorescence intensity variation suggests high consistency across the particles. Correlative Raman, UV–Vis spectroscopy, and electrochemical impedance spectroscopy analyses suggest the precipitation of V3+ species at the bottom interface of the V2O5 electrode, leading to increased electron transfer resistance and compromised overall performance. A coordination strategy between ethylene diamine tetraacetic acid and V3+ is proposed for inhibiting V3+ precipitation, and its effectiveness is further verified by imaging and electrochemical impedance spectroscopy analyses. Insights from the imaging approach presented herein will enable the rational design of high-performance batteries.
{"title":"Imaging the 4D Chemical Heterogeneity of Single V2O5 Particles During Charging/Discharging Processes","authors":"Jiaxin Mao, Binhong Wu, Rui Hao","doi":"10.1002/adma.202501425","DOIUrl":"https://doi.org/10.1002/adma.202501425","url":null,"abstract":"Microparticle cathode materials are widely used in secondary batteries. However, obtaining dynamic chemical heterogeneities of these microparticles is challenging, hindering in-depth mechanistic investigation of the underlying processes. For example, although vanadium pentoxide shows promise as an electrode material for zinc ion batteries, its poor performance's root cause is elusive. Herein, a fluorescence/scattering dual-mode spinning disk confocal microscopy-based approach is developed to visualize the 4D chemical heterogeneity of single V<sub>2</sub>O<sub>5</sub> particles during cycling. Dual-mode in situ imaging identifies valence state changes of vanadium ions with high spatiotemporal resolution. A unique difference is observed between the scattering intensities of a particle's bottom electric contact points and the rest parts during the discharging process. In contrast, fluorescence intensity variation suggests high consistency across the particles. Correlative Raman, UV–Vis spectroscopy, and electrochemical impedance spectroscopy analyses suggest the precipitation of V<sup>3+</sup> species at the bottom interface of the V<sub>2</sub>O<sub>5</sub> electrode, leading to increased electron transfer resistance and compromised overall performance. A coordination strategy between ethylene diamine tetraacetic acid and V<sup>3+</sup> is proposed for inhibiting V<sup>3+</sup> precipitation, and its effectiveness is further verified by imaging and electrochemical impedance spectroscopy analyses. Insights from the imaging approach presented herein will enable the rational design of high-performance batteries.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"3 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814147","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}
Yi Yu, Bing-Feng Wang, Yang Shen, Yu-Tong Wang, Yu-Hang Zhang, Ying-Ying Li, Zhen-Huang Su, Long-Xue Cao, Shi-Chi Feng, Yuan-Hang Wu, Xing-Yu Gao, Satoshi Kera, Nobuo Ueno, Jian-Xin Tang, Yan-Qing Li
Perovskite light-emitting diodes (PeLEDs) are emerging as strong candidates for next-generation displays due to their outstanding optoelectronic properties, solution processability, and cost-effectiveness. However, the development of highly efficient blue PeLEDs remains a significant challenge. Here, a bottom-up strategy is introduced for precise charge manipulation in blue perovskites to enhance radiative recombination efficiency. By employing 1,3-bis(N-carbazolyl)benzene as an inserted hole transport layer, improved hole injection efficiency is achieved while effectively suppressing reverse electron transport and exciton quenching. Additionally, a fluorinated ester additive is incorporated to control perovskite crystallization, facilitating the formation of well-aligned reduced-dimensional phases to reduce nonradiative recombination losses. The resulting blue PeLEDs exhibit a record-breaking external quantum efficiency of 25.87%, the highest reported for one-step-prepared blue perovskite films. Furthermore, integration with thin-film transistor circuits enables solution-processed active-matrix perovskite displays with sharp and uniform patterning. This work provides a comprehensive pathway for advancing blue PeLEDs toward high-performance display applications.
{"title":"Efficient Blue Perovskite LEDs via Bottom-Up Charge Manipulation for Solution-Processed Active-Matrix Displays","authors":"Yi Yu, Bing-Feng Wang, Yang Shen, Yu-Tong Wang, Yu-Hang Zhang, Ying-Ying Li, Zhen-Huang Su, Long-Xue Cao, Shi-Chi Feng, Yuan-Hang Wu, Xing-Yu Gao, Satoshi Kera, Nobuo Ueno, Jian-Xin Tang, Yan-Qing Li","doi":"10.1002/adma.202503234","DOIUrl":"https://doi.org/10.1002/adma.202503234","url":null,"abstract":"Perovskite light-emitting diodes (PeLEDs) are emerging as strong candidates for next-generation displays due to their outstanding optoelectronic properties, solution processability, and cost-effectiveness. However, the development of highly efficient blue PeLEDs remains a significant challenge. Here, a bottom-up strategy is introduced for precise charge manipulation in blue perovskites to enhance radiative recombination efficiency. By employing 1,3-bis(N-carbazolyl)benzene as an inserted hole transport layer, improved hole injection efficiency is achieved while effectively suppressing reverse electron transport and exciton quenching. Additionally, a fluorinated ester additive is incorporated to control perovskite crystallization, facilitating the formation of well-aligned reduced-dimensional phases to reduce nonradiative recombination losses. The resulting blue PeLEDs exhibit a record-breaking external quantum efficiency of 25.87%, the highest reported for one-step-prepared blue perovskite films. Furthermore, integration with thin-film transistor circuits enables solution-processed active-matrix perovskite displays with sharp and uniform patterning. This work provides a comprehensive pathway for advancing blue PeLEDs toward high-performance display applications.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"56 1","pages":""},"PeriodicalIF":29.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143805987","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}