Electronic Materials Letters最新文献_第2页

Morphology Engineering Enables Structural Stability and Kinetics of O3-Na0.87Fe0.5Mn0.5O2 Cathode Material for Sodium-Ion Batteries O3-Na0.87Fe0.5Mn0.5O2钠离子电池正极材料的结构稳定性和动力学研究

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-04-11 DOI: 10.1007/s13391-026-00644-5

HaoFeng Tan, Shan Jin, JunXia Meng, ChaoHui Chen, DeHao Fu, YingXiang Zhong, Qian Zhang, QuanXin Ma

{"title":"Morphology Engineering Enables Structural Stability and Kinetics of O3-Na0.87Fe0.5Mn0.5O2 Cathode Material for Sodium-Ion Batteries","authors":"HaoFeng Tan, Shan Jin, JunXia Meng, ChaoHui Chen, DeHao Fu, YingXiang Zhong, Qian Zhang, QuanXin Ma","doi":"10.1007/s13391-026-00644-5","DOIUrl":"10.1007/s13391-026-00644-5","url":null,"abstract":"<div><p>O3<b>-</b>type layered oxide cathode materials have garnered substantial attention owing to their high theoretical capacity and low cost, making them one of the most promising candidates for sodium-ion battery (SIB) cathodes. Nevertheless, their practical application is hindered by insufficient structural stability and inferior rate capability. Rational morphology engineering emerges as a viable strategy to alleviate these drawbacks, as it can enlarge the Na<sup>+</sup> interlayer spacing, increase the electroactive surface area, and thereby enhance both structural integrity and ionic transport kinetics. In this study, a co-precipitation method was adopted to regulate the morphology of the Fe<sub>0.5</sub>Mn<sub>0.5</sub>(OH)<sub>2</sub> precursor (denoted as FM-X) by tailoring the reaction environment. The ultimately synthesized O3-Na<sub>0.87</sub>Fe<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub> cathode material (denoted as NFMO-X) exhibit distinct morphologies and microstructures. Notably, the NFMO-9.5 sample, prepared at pH = 9.5 with a hexagonal block-like morphology, possesses high crystallinity, abundant surface active sites exposed {010} planes, and an expanded Na<sup>+</sup> interlayer spacing. These favorable characteristics endow NFMO-9.5 with the highest initial discharge specific capacity (163.61 mAh g<sup>− 1</sup> at 0.1 C), better capacity retention rate (73% after 100 cycles at 1.0 C), and superior Na<sup>+</sup> diffusion coefficient (2.6 × 10<sup>− 14</sup> cm<sup>2</sup> s<sup>− 1</sup>). This study reveals the correlation between material morphology, microstructure and electrochemical performance, providing valuable insights for the rational design of high-performance SIB cathode materials.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 6","pages":"566 - 578"},"PeriodicalIF":3.1,"publicationDate":"2026-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149367395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning sp3/sp2 Carbon Hybridization to Realize Highly Durable Gas Diffusion Layers (GDLs) for Fuel Cells 调整sp3/sp2碳杂交实现燃料电池高耐用气体扩散层(gdl

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-03-17 DOI: 10.1007/s13391-026-00643-6

Tang Yu, Ge Jing, Yu Jun-kai, Su Zhi-peng, Yang Si-cheng, Shu-hong Liu, Li Zhu-xin, Zhao Hong, Zhang Yong

{"title":"Tuning sp3/sp2 Carbon Hybridization to Realize Highly Durable Gas Diffusion Layers (GDLs) for Fuel Cells","authors":"Tang Yu, Ge Jing, Yu Jun-kai, Su Zhi-peng, Yang Si-cheng, Shu-hong Liu, Li Zhu-xin, Zhao Hong, Zhang Yong","doi":"10.1007/s13391-026-00643-6","DOIUrl":"10.1007/s13391-026-00643-6","url":null,"abstract":"<div><p>Gas diffusion layers (GDLs) are important components of fuel cells, which play important roles in supporting catalyst layer, collecting current, transmitting gas and managing water reaction product in fuel cells. Due to the carbon corrosion issue, however, the durability of GDLs is still not satisfied. Herein, a duplex oxidation–reduction treatment is adopted to tune the <i>sp</i><sup>3</sup>/<i>sp</i><sup>2</sup> hybridization of CNTs in GDLs. XRD, FTIR and Raman spectroscopies measurement elucidated that, the <i>sp</i><sup>3</sup>/<i>sp</i><sup>2</sup> ratio of GDLs was precisely tuned by duplex oxidation–reduction treatment, which enhanced the electrochemical stability and electric conductivity of GDLs. When duplex oxidation–reduction treated GDLs were assembled to single fuel cells, a high power-density (838 mW cm<sup>−2</sup>) was achieved, which was much higher than that of untreated GDLs (571 mW cm<sup>−2</sup>). Because the output power-density of single fuel cells in this paper is similar to that of commercial GDLs assembled fuel cells (908 mW cm<sup>−2</sup>), the s–p hybridization route will provide fruitful highlights to overcome carbon corrosion and find promising applications in the fields of fuel cells.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>The sp<sup>3</sup>/sp<sup>2</sup> ratio of GDLs is precisely tuned by a duplex oxidation-reduction treatment. Regulating sp<sup>3</sup>/sp<sup>2</sup> ratio of GDLs, the output power-density of single fuel cell is increased 46.7%. The s–p hybridization route paves a new road to design highly durable GDLs for fuel cells</p></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 5","pages":"437 - 448"},"PeriodicalIF":3.1,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Z-Scheme Charge Transfer in BiOCl/CoWO4 Heterostructures for Enhanced Photocatalytic Removal of Ciprofloxacin and Microplastics BiOCl/CoWO4异质结构中Z-Scheme电荷转移增强光催化去除环丙沙星和微塑料

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-03-12 DOI: 10.1007/s13391-026-00640-9

Xuanyi Huo, Yi Dong, Jingjing Xu, Mindong Chen

{"title":"Z-Scheme Charge Transfer in BiOCl/CoWO4 Heterostructures for Enhanced Photocatalytic Removal of Ciprofloxacin and Microplastics","authors":"Xuanyi Huo, Yi Dong, Jingjing Xu, Mindong Chen","doi":"10.1007/s13391-026-00640-9","DOIUrl":"10.1007/s13391-026-00640-9","url":null,"abstract":"<div><p>To develop highly efficient photocatalysts for environmental pollution control, constructing Z-scheme heterojunctions with excellent redox capabilities is one of the effective approaches. In this study, a Z-scheme BiOCl (BOC)/CoWO₄ (CWO) heterostructure was fabricated via a solvothermal method. When exposed to visible light, this composite showed substantially higher efficiency in degrading ciprofloxacin (CIP) via photocatalysis. The best-performing sample, BCW-2, attained a 91.2% degradation efficiency over 40 min. Its degradation rate constant (k) was 37.59 times and 3.44 times higher than that of pure CoWO₄ and pristine BiOCl, respectively. Notably, BCW-2 showed a moderate degradation effect on polyethylene (PE) microplastics, resulting in an 8.3% decrease in weight within 24 h. Characterization tests revealed that the enhanced charge separation and transfer capabilities, as well as the suppression of carrier recombination in the heterojunction, contributed to the improved photocatalytic performance. Furthermore, quenching experiments combined with ESR spectroscopy revealed a Z-scheme charge transfer pathway, offering a theoretical foundation for the exceptional photocatalytic degradation efficiency observed.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 5","pages":"478 - 496"},"PeriodicalIF":3.1,"publicationDate":"2026-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metastable Phase in Molybdate XMoO4 (X = Ni, Co, Cu) for Oxygen Evolution Reaction: Structural Phase Dependence 钼酸盐XMoO4 （X = Ni, Co, Cu）析氧反应的亚稳相：结构相依赖性

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-03-12 DOI: 10.1007/s13391-026-00641-8

Si Hoon Jeong, Seung Yong Lee, Nosang Vincent Myung, Kyu Hyoung Lee

{"title":"Metastable Phase in Molybdate XMoO4 (X = Ni, Co, Cu) for Oxygen Evolution Reaction: Structural Phase Dependence","authors":"Si Hoon Jeong, Seung Yong Lee, Nosang Vincent Myung, Kyu Hyoung Lee","doi":"10.1007/s13391-026-00641-8","DOIUrl":"10.1007/s13391-026-00641-8","url":null,"abstract":"<div><p>Piezochromic molybdates (XMoO<sub>4</sub>, X = Ni, Co, Cu) can reversibly modulate their color via pressure- or temperature-induced polymorphic phase transitions. Beyond chromic behavior, the structural flexibility of the molybdate sublattice, switching between [MoO<sub>4</sub>] tetrahedral and [MoO<sub>6</sub>] octahedral coordination, implies tunable charge-transfer characteristics that are highly relevant to electrochemical applications, particularly when these compounds are regarded as metastable materials with intrinsically active frameworks. Herein, we demonstrate that microscale XMoO<sub>4</sub> powders exhibit distinct oxygen evolution reaction (OER) activities governed by structural instability and electronic structure. Single-phase XMoO<sub>4</sub> micropowders show composition-dependent OER performance (151 mA cm<sup>-2</sup> for NiMoO<sub>4</sub>, 218 mA cm<sup>-2</sup> for CoMoO<sub>4</sub>, and 206 mA cm<sup>-2</sup> for CuMoO<sub>4</sub> in 1 M KOH). Moreover, the electrochemical oxidation behavior of XMoO<sub>4</sub> during water electrolysis varies markedly with the structural phase described (α and β), particularly near an applied potential of ~ 1 V. These results highlight the catalytic potential of metastable ternary metal oxide powders without relying on noble or rare-earth elements and suggest that metastability can serve as an effective design parameter for advanced electrocatalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 5","pages":"429 - 436"},"PeriodicalIF":3.1,"publicationDate":"2026-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13391-026-00641-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Sensitivity Enzyme-Free Glucose Sensing and Enhanced Photocurrent Response by a Nanoporous CuO and CuO-ZnO Composite 纳米多孔CuO和CuO- zno复合材料的高敏无酶葡萄糖传感和增强光电流响应

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-03-10 DOI: 10.1007/s13391-026-00642-7

Dayoung Yoo, Minseok Kim, Jingya Wang, Shinyoung Kim, Siyeon Joo, Dongyun Lee

{"title":"High-Sensitivity Enzyme-Free Glucose Sensing and Enhanced Photocurrent Response by a Nanoporous CuO and CuO-ZnO Composite","authors":"Dayoung Yoo, Minseok Kim, Jingya Wang, Shinyoung Kim, Siyeon Joo, Dongyun Lee","doi":"10.1007/s13391-026-00642-7","DOIUrl":"10.1007/s13391-026-00642-7","url":null,"abstract":"<div><p>This study presents the synthesis and multifunctional performance of nanoporous CuO-ZnO composites prepared via a polymer-confined direct solution pyrolysis (PDSP) method. The fabricated materials exhibit a highly porous architecture with uniformly distributed <i>p</i>-type CuO and <i>n</i>-type ZnO phases, forming efficient p–n heterojunctions. Electrochemical investigations revealed that the nanoporous CuO–ZnO electrodes achieved a high sensitivity of up to 8 mA cm⁻² mM⁻¹ with a rapid response time as fast as 1 s for enzyme-free glucose sensing, significantly outperforming other types of copper oxide- and Au- or Cu metal-based sensors. Additionally, photocurrent analysis under simulated solar illumination demonstrated a 5.6-fold enhancement in photocurrent for the CuO-ZnO composite compared to ZnO alone, which is attributed to efficient charge carrier separation across the heterojunction and improved light harvesting enabled by the porous structure. These findings highlight the potential of PDSP-derived CuO-ZnO nanocomposites as dual-functional materials for electrochemical glucose sensing and solar-driven photocatalysis.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 5","pages":"449 - 457"},"PeriodicalIF":3.1,"publicationDate":"2026-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-Step Synthesis of Ni-Mo2C/N-Biochar Heterojunction Bifunctional Electrocatalyst from Waste Grapefruit Peel for Efficient Overall Water Electrolysis 废柚子皮一步法合成Ni-Mo2C/ n -生物炭异质结双功能电催化剂

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-02-26 DOI: 10.1007/s13391-026-00639-2

Fangzhen He, Ying Bai, Aiju Zhang, Xiaolin Zhang, Fang Wang, Qingyun Wang, Ming Zhong, Bitao Su, Na Dong

{"title":"One-Step Synthesis of Ni-Mo2C/N-Biochar Heterojunction Bifunctional Electrocatalyst from Waste Grapefruit Peel for Efficient Overall Water Electrolysis","authors":"Fangzhen He, Ying Bai, Aiju Zhang, Xiaolin Zhang, Fang Wang, Qingyun Wang, Ming Zhong, Bitao Su, Na Dong","doi":"10.1007/s13391-026-00639-2","DOIUrl":"10.1007/s13391-026-00639-2","url":null,"abstract":"<div><p>Amidst escalating global energy crises and environmental degradation, biomass resources offer a critical pathway for energy transition through their inherent renewability, carbon neutrality, and abundance. However, efficient conversion of waste biomass remains impeded by compositional complexity and suboptimal process energetics, constraining scalable industrial implementation. Building on this, we innovatively utilize waste grapefruit peel as a multifunctional precursor to construct Ni-Mo₂C heterojunction nanocomposites (Ni-Mo₂C/NGC) on a biomass-derived N-doped graphene-like carbon matrix (NGC) via an in situ one-step pyrolysis strategy. Electrocatalytic evaluation reveals that the nanocomposite exhibits outstanding bifunctional activity for both oxygen and hydrogen evolution reactions (OER/HER) in alkaline electrolyte, achieving low overpotentials (<i>η</i>) of 260 mV for OER and 120 mV for HER at a current density of 10 mA cm⁻², with corresponding Tafel slopes of 48 and 52 mV dec⁻¹, respectively. Density functional theory (DFT) calculations elucidate that synergistic interfacial electron coupling between Ni and Mo₂C at the heterojunction significantly elevates the density of exposed catalytic active sites, optimizes the adsorption free energy of key reaction intermediates, and accelerates interfacial charge transfer kinetics, thereby cooperatively enhancing the intrinsic bifunctional electrocatalytic activity. This study establishes a novel strategy for the high-value-oriented preparation of high-performance electrocatalysts from waste biomass, providing insights into the construction of non-precious metal bifunctional heterojunction catalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 5","pages":"417 - 428"},"PeriodicalIF":3.1,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radiation-Tolerant Amorphous Indium–Zinc–Tin–Oxide Thin-Film Transistors 耐辐射非晶铟锌锡氧化物薄膜晶体管

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-02-24 DOI: 10.1007/s13391-026-00633-8

Dongwon Kang, Subin Jeon, Eun Chong Ju, Jaewon Shin, Dayul Nam, Jaehyun Kim, Sung Kyu Park

{"title":"Radiation-Tolerant Amorphous Indium–Zinc–Tin–Oxide Thin-Film Transistors","authors":"Dongwon Kang, Subin Jeon, Eun Chong Ju, Jaewon Shin, Dayul Nam, Jaehyun Kim, Sung Kyu Park","doi":"10.1007/s13391-026-00633-8","DOIUrl":"10.1007/s13391-026-00633-8","url":null,"abstract":"<div><p>Metal oxide thin-film transistors (MOTFTs) have been widely utilized in various electronic devices such as display backplanes, radiation detectors, and aerospace applications. As these electronics are increasingly deployed in harsh space and heavy radiation environments, the demand for semiconductor materials capable of maintaining electrical and structural stability has intensified. However, the limited understanding of how X-ray irradiation influences metal oxide semiconductor behavior has hindered their reliable use in practical heavy-radiation environments. In this study, we investigate the change of the electrical characteristics of metal oxide semiconductors such as amorphous indium gallium zinc oxide (a-IGZO), zinc tin oxide (a-ZTO), and indium zinc tin oxide (a-IZTO) under X-ray irradiation. The extracted threshold voltage shifts reveal a substantial difference among the three metal oxide semiconductors, with a-IGZO exhibiting a large shift of ΔV<sub>th</sub> ≤ 16 V and a-ZTO showing a moderate shift of ΔV<sub>th</sub> ≤ 7.1 V, while a-IZTO demonstrates significantly improved irradiation tolerance with a minimal shift of ΔV<sub>th</sub> ≤ 2.3 V even when the corresponding TFTs are X-ray irradiated up to 7 kGy. The distinct threshold voltage shifts induced under X-ray irradiation are primarily driven by excessive oxygen vacancy formation and radiation induced ionization. This study demonstrates that metal oxide semiconductors have significant potential as radiation hardness large area electronic devices for medical and aerospace applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 4","pages":"348 - 355"},"PeriodicalIF":3.1,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148281809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Performance High-Entropy Oxide (FeMnAlCrTi)3O4 as a Cathode Material for Aqueous Zinc-Ion Batteries 高性能高熵氧化物（FeMnAlCrTi）3O4作为锌离子电池正极材料

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2026-02-24 DOI: 10.1007/s13391-026-00636-5

Renzhi Jiang, Yuncheng Cai, Dingce Yan

{"title":"High-Performance High-Entropy Oxide (FeMnAlCrTi)3O4 as a Cathode Material for Aqueous Zinc-Ion Batteries","authors":"Renzhi Jiang, Yuncheng Cai, Dingce Yan","doi":"10.1007/s13391-026-00636-5","DOIUrl":"10.1007/s13391-026-00636-5","url":null,"abstract":"<div><p>Aqueous zinc-ion batteries (ZIBs) have emerged as a highly promising candidate for next-generation energy storage systems, owing to their inherent cost-effectiveness, exceptional safety, and environmental benignity. However, the sluggish development of high-performance cathode materials remains a critical bottleneck hindering the practical application of ZIBs. Herein, we report the rational design and successful synthesis of a novel high-entropy oxide, (FeMnAlCrTi)<sub>3</sub>O<sub>4</sub> (denoted as FMACTO), and systematically evaluate its electrochemical performance as a cathode material for ZIBs. Benefiting from the unique multi-cation synergistic effect and lattice distortion inherent in FMACTO, the material exhibits significantly enhanced electronic conductivity and accelerated zinc-ion diffusion kinetics. As a result, FMACTO delivers a high specific capacity of 238.6 mAh g⁻¹ at a current density of 0.2 A g⁻¹ and excellent cycling stability with 70.1% capacity retention after 1100 charge-discharge cycles. This work not only demonstrates the great potential of FMACTO as a high-performance ZIB cathode but also provides a versatile high-entropy design strategy for the development of advanced electrode materials in energy storage fields.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 3","pages":"273 - 279"},"PeriodicalIF":2.6,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147743684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling the Substrate Effect: A Combined Experimental and Simulation Study of Field Emission from Carbon Nanotubes on Stainless Steel and Silicon 揭示衬底效应：碳纳米管在不锈钢和硅上场发射的实验与模拟相结合研究

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-02-21 DOI: 10.1007/s13391-026-00637-4

Jianwei Chen, Yike Zhao, Yajie Guo, Wuwei Feng, Jiajie Fan, Yangyang Zhao, Jun Jiang

{"title":"Unveiling the Substrate Effect: A Combined Experimental and Simulation Study of Field Emission from Carbon Nanotubes on Stainless Steel and Silicon","authors":"Jianwei Chen, Yike Zhao, Yajie Guo, Wuwei Feng, Jiajie Fan, Yangyang Zhao, Jun Jiang","doi":"10.1007/s13391-026-00637-4","DOIUrl":"10.1007/s13391-026-00637-4","url":null,"abstract":"<div><p>Carbon nanotubes (CNTs) have emerged as promising candidates for next-generation cold cathode electron sources due to their excellent field emission properties. However, the mechanism by which substrate materials influence emission performance remains poorly understood. In this work, we systematically investigate the field emission behavior of CNTs grown on stainless steel (SS304) and silicon (Si) substrates by combining experimental characterization with finite element simulations. The results show that the SS304 substrate, owing to its high electrical conductivity, significantly reduces contact resistance, enabling an ultralow turn-on field of 1.86 V/µm and high current density of 5.5 mA/cm<sup>2</sup>, thereby greatly enhancing emission efficiency. In contrast, although the Si substrate has lower electrical conductivity, its high thermal conductivity ranging from 140 to 150 W/(m·K) allows for effective heat dissipation, resulting in excellent long-term stability with only 7% current fluctuation over a 4 h period, which is significantly better than the 15% fluctuation observed for the SS304 based cathode. Triode structured electron gun tests further confirm the superior output performance of the SS304 based device under low driving voltages. Our results reveal a key trade-off between emission efficiency and thermal stability governed by substrate properties, providing valuable guidance for optimal substrate selection in the development of high performance and reliable carbon nanotube based vacuum electronic devices.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 5","pages":"458 - 467"},"PeriodicalIF":3.1,"publicationDate":"2026-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Photodetection in Slanted Silicon Nanowire Array via Spin-On-Glass-Based Surface Passivation 基于玻璃自旋表面钝化的斜硅纳米线阵列增强光探测

IF 3.1 4区材料科学

Electronic Materials Letters Pub Date : 2026-02-21 DOI: 10.1007/s13391-026-00638-3

Hayoung Jang, Youngmin Kim

{"title":"Enhanced Photodetection in Slanted Silicon Nanowire Array via Spin-On-Glass-Based Surface Passivation","authors":"Hayoung Jang, Youngmin Kim","doi":"10.1007/s13391-026-00638-3","DOIUrl":"10.1007/s13391-026-00638-3","url":null,"abstract":"<div><p>Slanted silicon (Si) nanowire (NW) arrays have emerged as a promising platform for high-performance photodetectors due to their large surface-to-volume ratio, intrinsic anti-reflection characteristics and asymmetric geometry that enables diverse optical mode coupling. Although the slanted geometry inherently provides enhanced light trapping capability, its practical implementation has been hindered by challenges in achieving uniform and effective surface passivation, an issue far less problematic in vertically standing NW arrays. Here, we present an effective silicon oxide (SiO<sub>x</sub>) passivation strategy for slanted Si NW arrays using spin-on-glass (SOG) technology, leading to an improved optical absorption. The inter-wire gaps were filled with SOG and subsequently annealed to convert the material into SiO<sub>x</sub>, thereby uniformly passivating the NW surfaces. Finite-difference time-domain (FDTD) simulations reveal that the uniformly formed SiO<sub>x</sub> layer enhances optical absorption by ~ 70% at 1060 nm, attributed to an increased effective refractive index within the NW array, which improves accommodation of the longer-wavelength incident light inside the NW array. Experimentally, the passivated NW array exhibits a markedly reduced dark current of 2.6 µA at 3 V, compared with 133 µA for unpassivated device, along with an improved responsivity of ~ 17 mA/W at 1050 nm, in contrast to ~ 6 mA/W observed in the unpassivated device. This work demonstrates a simple yet effective passivation route for slanted NW architectures, offering a scalable pathway to enhance light absorption and stability in Si-based photodetection applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"22 5","pages":"403 - 408"},"PeriodicalIF":3.1,"publicationDate":"2026-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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