Electronic Materials Letters最新文献_第2页

Electrostatic Self-Assembly of Upconversion-Functionalized Z-Scheme Heterojunction Photocatalyst and its Environmental Applications 上转换功能化z型异质结光催化剂的静电自组装及其环境应用

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-05-30 DOI: 10.1007/s13391-025-00580-w

Xinyuan Chen, Weiyang Chen, Jingjing Xu, Mindong Chen

引用次数: 0

Effects of Rotating Speed of Rotating Cylinder Electrode and Bath Composition on Fe–Ni Alloy Electroplating 旋转圆柱电极转速及镀液成分对Fe-Ni合金电镀的影响

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-05-23 DOI: 10.1007/s13391-025-00571-x

Na-Young Kang, Jae-Ho Lee

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Synergistic Enhancement of White Luminescence in WLEDs via g-C3N4-Integrated Ln-MOF Composites with Suppressed Antenna Effect 抑制天线效应的g- c3n4集成Ln-MOF复合材料协同增强wled白光

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-05-21 DOI: 10.1007/s13391-025-00578-4

Jinhu Guo, Qianwei Wang, Qi Wu, Xinyu Yang, Mengxuan Fang, Yang Li, Li Zhang, Longcheng Wang

{"title":"Synergistic Enhancement of White Luminescence in WLEDs via g-C3N4-Integrated Ln-MOF Composites with Suppressed Antenna Effect","authors":"Jinhu Guo, Qianwei Wang, Qi Wu, Xinyu Yang, Mengxuan Fang, Yang Li, Li Zhang, Longcheng Wang","doi":"10.1007/s13391-025-00578-4","DOIUrl":"10.1007/s13391-025-00578-4","url":null,"abstract":"<div><p>This study proposes a novel strategy to enhance the performance of white light-emitting diodes (WLEDs) by integrating graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) as an independent blue emitter into Tb<sup>3+</sup>/Eu<sup>3+</sup>-doped lanthanide metal–organic frameworks (Ln-MOFs). Traditional Ln-MOF-based WLEDs suffer from low luminous efficiency due to the Antenna Effect, which compromises energy transfer between ligands and lanthanide ions. By incorporating g-C<sub>3</sub>N<sub>4</sub> with high-concentration Tb<sup>3+</sup>/Eu<sup>3+</sup>-doped Ln-MOFs, the optimized composite material, g-C<sub>3</sub>N<sub>4</sub>@Tb<sub>0.95</sub>Eu<sub>0.05</sub>-MOF, demonstrated remarkable improvements in photoluminescence properties. Compared to conventional Gd<sub>0.978</sub>Tb<sub>0.02</sub>Eu<sub>0.002</sub>-MOF, the composite achieved a luminous flux of 1.24 lm, luminous efficacy of 1.66 lm/W, and color rendering index (CRI) of 91.6, representing 10.34-fold, 9.23-fold, and 9.0 enhancements, respectively. Mechanistic studies revealed no energy transfer between g-C<sub>3</sub>N<sub>4</sub> and Ln<sup>3+</sup> ions, enabling stable blue emission from g-C<sub>3</sub>N<sub>4</sub> while high-concentration Tb<sup>3+</sup> and Eu<sup>3+</sup> ions enhanced green and red emissions. This work provides a promising approach for designing high-performance WLEDs.</p><h3>Graphic Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"21 4","pages":"599 - 612"},"PeriodicalIF":2.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168006","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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Purification of Alq3 Using Ionic Liquids: Effects on Purity and Mobility for Improved OLED Performance 离子液体纯化Alq3：纯度和迁移率对OLED性能的影响

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-05-20 DOI: 10.1007/s13391-025-00577-5

Dong-Su Kim, Tae Won Ha, In Jae Park, Dae Yun Lim, Young Baek Kim, Jin Hyeok Kim, Dong Chan Shin, Chil-Hyoung Lee

{"title":"Purification of Alq3 Using Ionic Liquids: Effects on Purity and Mobility for Improved OLED Performance","authors":"Dong-Su Kim, Tae Won Ha, In Jae Park, Dae Yun Lim, Young Baek Kim, Jin Hyeok Kim, Dong Chan Shin, Chil-Hyoung Lee","doi":"10.1007/s13391-025-00577-5","DOIUrl":"10.1007/s13391-025-00577-5","url":null,"abstract":"<div><p>Alq<sub>3</sub> exists in five crystalline phases, with the δ-phase offering excellent charge transport characteristics owing to its minimal π-orbital overlap and short intermolecular binding distance. Previously, the purification of Alq<sub>3</sub> to obtain this specific phase was achieved using ionic liquids instead of sublimation methods. By controlling concentration and temperature, high-purity δ-phase Alq<sub>3</sub> could be obtained. In this study, the effectiveness of purifying Alq<sub>3</sub> using ionic liquids was examined not through high-performance liquid chromatography measurements but by fabricating and characterizing organic light-emitting devices (OLEDs) to assess improvements in purity and mobility. I–V–L measurements of the fabricated devices revealed a decrease in threshold voltage, an increase in maximum luminance, and a reduction in sub-threshold swing after purification. The I–V characteristics confirmed the effectiveness of ionic-liquid-based purification in enhancing material purity. Lastly, electron-only devices were fabricated, and charge mobility was calculated using the Mott–Gurney equation. The simulation and experimental results were compared to clarify the influence of δ-phase Alq<sub>3</sub> purified with ionic liquids on OLED performance.</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":"21 4","pages":"568 - 578"},"PeriodicalIF":2.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166835","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

Effects of Work Function and Thermal Stability of Top Electrode Materials on Electrical Properties of ZrO2-Based DRAM Capacitors 顶电极材料的功函数和热稳定性对zro2基DRAM电容器电性能的影响

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-05-08 DOI: 10.1007/s13391-025-00573-9

Hyeongjun Kim, Kyungmin Choi, Hojin Lee, Woongkyu Lee

{"title":"Effects of Work Function and Thermal Stability of Top Electrode Materials on Electrical Properties of ZrO2-Based DRAM Capacitors","authors":"Hyeongjun Kim, Kyungmin Choi, Hojin Lee, Woongkyu Lee","doi":"10.1007/s13391-025-00573-9","DOIUrl":"10.1007/s13391-025-00573-9","url":null,"abstract":"<div><p>The effects of work function and thermal stability of top electrode (TE) materials on the electrical properties of TE/ZrO<sub>2</sub>/TiN capacitors for dynamic random-access memory applications were investigated. TEs of Au, Ag, and Al were deposited via thermal evaporation on the atomic-layer-deposited ZrO<sub>2</sub> dielectric layer on a TiN bottom electrode. The high work function of 5.1 eV of Au induced a very stable insulating property, while Ag and Al showed relatively higher leakage current with equivalent dielectric layer fabrication process. To evaluate the interfacial properties between the electrode and dielectric as well as the thermal stability of the electrode, post-metallization annealing (PMA) was performed in an air ambient at 400 °C for 30 min. Ag<sup>+</sup> ion was diffused into the ZrO<sub>2</sub> layer and Al was oxidized to Al<sub>2</sub>O<sub>3</sub> at the interface for Ag and Al TEs, respectively, and severe capacitance degradation occurred. However, Au TE exhibited superior interfacial properties after PMA owing to a curing effect that promoted reducing oxygen vacancies and imperfections near the TE interface, and improved both dielectric and insulating properties.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"21 4","pages":"559 - 567"},"PeriodicalIF":2.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163218","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

Superhydrophobic Polysilicon Surface Induced by Stearic Acid-treated La(OH)3 Coating 硬脂酸处理的La(OH)3涂层诱导的超疏水多晶硅表面

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-05-07 DOI: 10.1007/s13391-025-00576-6

Junseong Hur, Sangwoo Ryu

{"title":"Superhydrophobic Polysilicon Surface Induced by Stearic Acid-treated La(OH)3 Coating","authors":"Junseong Hur, Sangwoo Ryu","doi":"10.1007/s13391-025-00576-6","DOIUrl":"10.1007/s13391-025-00576-6","url":null,"abstract":"<div><p>The growth and surface functionalization of silicon (Si) thin films have attracted significant attention for applications in microelectronics, photovoltaics, sensors, and actuators. Among various surface functionalities, hydrophobicity is critical in environments where contact with water-based liquids must be minimized. In this study, a 50 μm-thick polycrystalline Si film was deposited on a SiO₂/Si substrate using plasma-enhanced chemical vapor deposition (PECVD). X-ray diffraction revealed a strong (220) preferential orientation with a naturally textured surface morphology. Surface modification with stearic-acid-treated lanthanum hydroxide [SA-La(OH)₃] converted the initially hydrophilic Si surface to a hydrophobic state. When the treatment duration exceeded 12 h, the surface exhibited superhydrophobic behavior, with a water contact angle exceeding 150°. Furthermore, when applied to PET substrates commonly used in flexible electronics and photovoltaic backsheets, the SA-La(OH)₃ coating significantly reduced water vapor permeation by effectively repelling moisture. These results highlight the potential of SA-La(OH)₃ as a robust moisture barrier and a functional coating for hydrophobic surface engineering on Si-based devices.</p></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"21 4","pages":"626 - 632"},"PeriodicalIF":2.6,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163419","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

Evaluation of Layered Perovskite PrBaCo1.8Fe0.2O5+δ Cathode for Intermediate-Temperature Solid Oxide Fuel Cell 层状钙钛矿PrBaCo1.8Fe0.2O5+δ中温固体氧化物燃料电池阴极性能评价

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-05-07 DOI: 10.1007/s13391-025-00574-8

Aofei Li, Pingxiang Duan, Dingshan Zhen, Yue Xu, Fushao Li, YanYan Zhu, Tong Wu, Long Jiang, Qiming Pei

引用次数: 0

Synthesis of Highly Dense and Spherical Carbonate Mn0.5Fe0.5CO3 Precursor for LiMn0.5Fe0.5PO4 Cathode Material LiMn0.5Fe0.5PO4正极材料高密度球形碳酸盐Mn0.5Fe0.5CO3前驱体的合成

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-04-29 DOI: 10.1007/s13391-025-00575-7

Do Van Minh, Vitalii Ri, Jeongwoo Lim, Nguyen Cao Nam, Nguyen Minh Hieu, Chunjoong Kim

{"title":"Synthesis of Highly Dense and Spherical Carbonate Mn0.5Fe0.5CO3 Precursor for LiMn0.5Fe0.5PO4 Cathode Material","authors":"Do Van Minh, Vitalii Ri, Jeongwoo Lim, Nguyen Cao Nam, Nguyen Minh Hieu, Chunjoong Kim","doi":"10.1007/s13391-025-00575-7","DOIUrl":"10.1007/s13391-025-00575-7","url":null,"abstract":"<div><p>The development of electrical vehicles (EVs) demands more efficient and environmentally friendly electrode materials to extend the driving range and reduce the cost of the batteries. The transition metal phosphate is considered as a promising solution due to its non-toxicity, affordability and safety. However, its use has been hindered by the low tap density in comparison with layered oxide cathode materials, which limits the volumetric energy density of the batteries. In order to tackle this challenge, we synthesize high-performance LiMn<sub>0.5</sub>Fe<sub>0.5</sub>PO<sub>4</sub> (LFMP) from carbonate precursors prepared by co-precipitation method. In this work we demonstrated that adjusting key parameters of the co-precipitation process allows formation of dense and spherical precursors for micro-sized LMFP cathode materials. LMFP delivered 137.86 mAhg<sup>− 1</sup> at 50<sup>o</sup>C owing to the fast Li<sup>+</sup>-diffusion kinetics. Despite the necessity of further optimization, we believe that our synthesis route could pave the way to the development of high-energy-density batteries based on LMFP.</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":"21 4","pages":"590 - 598"},"PeriodicalIF":2.6,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170481","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

Wafer-Level Underfill Effect on Reliability of Microbump Under the Mixed Loading of Electromigration and Thermal Cycling 电迁移和热循环混合载荷下晶片级下填对微凸点可靠性的影响

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-04-25 DOI: 10.1007/s13391-025-00570-y

Kirak Son, Hyodong Ryu, Gahui Kim, Jeong Sam Han, Young-Bae Park

{"title":"Wafer-Level Underfill Effect on Reliability of Microbump Under the Mixed Loading of Electromigration and Thermal Cycling","authors":"Kirak Son, Hyodong Ryu, Gahui Kim, Jeong Sam Han, Young-Bae Park","doi":"10.1007/s13391-025-00570-y","DOIUrl":"10.1007/s13391-025-00570-y","url":null,"abstract":"<div><p>It is critical to apply wafer-level underfill (WLUF) to establish and improve the stability of microbumps. Although applying WLUF to microbump interconnection layers is common, understanding the behavior of microbump stability without WLUF protection is also critical. Electromigration (EM) and thermal cycling (T/C) tests were performed at a current density of 1.3 × 10<sup>5</sup> A/cm<sup>2</sup> at 150℃ and − 45 to 125℃, respectively, to investigate the effect of a WLUF on the reliability for mixed loading of EM and T/C in Cu/Ni/Sn-Ag microbumps. The results of the mixed loading tests showed different failure modes for microbumps with and without the WLUF. Microbump test samples without the WLUF exhibited horizontal cracks. On the other hand, the test samples with WLUF showed cracks propagating obliquely. A series of finite element analyses revealed that the WLUF caused vertical deformation and led to an increase in tensile stress, resulting in oblique crack propagation. These results suggest that the WLUF, due to its relatively high coefficient of thermal expansion, undergoes vertical expansion during thermal cycling, which introduces vertical tensile strain into the microbump structure. As a result, it functions as a stress redistribution layer that modifies the internal stress profile. This redistribution alters the crack propagation path and enhances the mechanical reliability of microbump interconnects under mixed EM and T/C loading.</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":"21 4","pages":"520 - 531"},"PeriodicalIF":2.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144618","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

Electromagnetic Interference Shielding Effect on the Strongly Correlated electron System NiWO4 Embedded in PDMS PDMS中嵌入强相关电子系统NiWO4的电磁干扰屏蔽效应

IF 2.6 4区材料科学

Electronic Materials Letters Pub Date : 2025-04-19 DOI: 10.1007/s13391-025-00572-w

Yunseong Ji, Gi Hyeon Han, Seung Yong Lee

{"title":"Electromagnetic Interference Shielding Effect on the Strongly Correlated electron System NiWO4 Embedded in PDMS","authors":"Yunseong Ji, Gi Hyeon Han, Seung Yong Lee","doi":"10.1007/s13391-025-00572-w","DOIUrl":"10.1007/s13391-025-00572-w","url":null,"abstract":"<div><p>The insulators in strongly correlated electron systems (SCES) exhibit exotic condensed matter phenomena due to the inherent strong Coulombic repulsion between magnetic cations within their crystal structures, which leads to polaronic hopping conduction, characterized by a high activation energy for carrier transport, and results in unique magnetic properties that vary with environmental conditions. Consequently, the physical properties of SCES insulators can be modulated by tailoring Coulombic repulsion through substitutional doping. In this study, we explore the electromagnetic interference (EMI) functionality of NiWO<sub>4</sub> SCES, which is tuned by substituting magnetic cations (X = V, Co, and Fe) at the Ni site. The magnetic cation-doped NiWO<sub>4</sub> SCES powders were synthesized via solid-state methods and confirmed as single-phase materials through X-ray diffraction (XRD) analysis. To fabricate the EMI film, NiWO<sub>4</sub> powders were mixed with polydimethylsiloxane (PDMS), followed by spin-coating and vacuum oven drying. Although the NiWO<sub>4</sub>-PDMS composites were physically mixed, as confirmed by optical measurements such as FT-IR and photoluminescence, the composite exhibited a reflection loss of approximately − 3 dB within the frequency range of 25–40 GHz. Upon substitution of magnetic cations at the Ni site, the X-NiWO<sub>4</sub> samples demonstrated an enhanced reflection loss of -8 dB, attributed to variations in magnetization. These findings highlight the EMI functionality of NiWO<sub>4</sub> SCES and the potential for further enhancement through magnetic cation doping. Given the simple composition of the NiWO<sub>4</sub>-PDMS system, SCES materials introduce the potential for advanced EMI functionality, providing insights into different mechanisms that can be achieved through optimized structural and compositional modifications.</p></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"21 4","pages":"552 - 558"},"PeriodicalIF":2.6,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167247","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