Synthetic Metals最新文献_第2页

Efficient decoration of graphene oxide with a narrow size distribution of noble metal nanoparticles: Green reduction and integration into a thermoelastic composite 用窄尺寸分布的贵金属纳米颗粒高效修饰氧化石墨烯：绿色还原并整合成热弹性复合材料

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-27 DOI: 10.1016/j.synthmet.2025.117894

D. Vella , D. Vengust , P. Umek , A. Rezaei , M. Jezeršek , A. Mrzel

{"title":"Efficient decoration of graphene oxide with a narrow size distribution of noble metal nanoparticles: Green reduction and integration into a thermoelastic composite","authors":"D. Vella , D. Vengust , P. Umek , A. Rezaei , M. Jezeršek , A. Mrzel","doi":"10.1016/j.synthmet.2025.117894","DOIUrl":"10.1016/j.synthmet.2025.117894","url":null,"abstract":"<div><div>We have developed a significantly enhanced method for the effective and homogeneous decoration of graphene oxide (GO) and reduced graphene oxide (r-GO) flakes with gold (Au) and platinum (Pt) nanoparticles. This method involves the direct nucleation of nanoparticles on the surface of dispersed GO through a single-step reaction. By carefully controlling the stepwise introduction of gold and platinum complexes at elevated temperatures, without additional reducing agents, we successfully achieved a homogeneous distribution of Au and Pt nanoparticles, ∼ 20 nm and ∼ 3 nm in size, densely covering the GO sheets. The decoration yield in a mass ratio between Au and GO was up to 20 %. Reduced GO with attached gold and platinum nanoparticles was obtained using ascorbic acid as a reducing agent. Finally, we embedded Au-decorated r-GO in polydimethylsiloxane (PDMS) to form a composite. We show how this stable hybrid material composite can be spin-coated to form a thin thermoelastic film on a flexible substrate, enabling promising photoacoustic properties that could be exploited further in biomedical applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117894"},"PeriodicalIF":4.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Analysis of supramolecular self-assembly in μ-phenoxide bridged heterocyclic β-diketone dinuclear Cu (II) complex μ-苯氧化合物桥接杂环β-二酮双核Cu （II）配合物的超分子自组装分析

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-27 DOI: 10.1016/j.synthmet.2025.117881

Mahesha , A.H. Udaya Kumar , M.J. Nagesh Khadri , K.J. Pampa , N.K. Lokanath

{"title":"Analysis of supramolecular self-assembly in μ-phenoxide bridged heterocyclic β-diketone dinuclear Cu (II) complex","authors":"Mahesha , A.H. Udaya Kumar , M.J. Nagesh Khadri , K.J. Pampa , N.K. Lokanath","doi":"10.1016/j.synthmet.2025.117881","DOIUrl":"10.1016/j.synthmet.2025.117881","url":null,"abstract":"<div><div>By introducing mixed-ligands (β-diketone and 8-hydroxyquinoline) to the Cu<sup>2 +</sup> ion, a new µ-phenoxide bridged binuclear complex was designed. The compound was synthesized using condensation method, and the single crystals were grown through the slow evaporation technique. The compound was characterized by energy dispersive X-ray analysis, Fourier-transform infrared spectroscopy and single-crystal X-ray diffraction technique. Structural analysis revealed that the compound is in the centrosymmetric dinuclear form, in which a central copper atom is linked by the obtuse phenolate oxygen atom. The center of inversion is located at the intersection of the two diagonals of the Cu<sub>2</sub>O<sub>2</sub> rhombus core within the dinuclear unit. The molecular arrangements influenced by the bridged phenolate oxygen, in which the chelating five-membered ring puckers with an envelope conformation. The crystal packing of individual motifs is facilitated by various supramolecular interactions, including hydrogen bonds, C-H…π and π…π interactions is explored by structural and computational studies. The similar type of crystal structures was extracted from the Cambridge Structural Database (CSD) allows for the exploration of structural similarities and the establishment of structure-property relationships by combined crystallographic and computational studies. Further, the copper complex-modified electrode exhibited a strong signal for dopamine oxidation, demonstrating a linear response and a low detection limit. This indicates effective structural modification, enhanced sensing capability, and promising potential for biomedical applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117881"},"PeriodicalIF":4.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Sulfur-decorated polyaniline-nanotube composites as cathode materials for lithium metal batteries 硫修饰聚苯胺-纳米管复合材料作为锂金属电池正极材料

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-27 DOI: 10.1016/j.synthmet.2025.117895

Lyaysan R. Latypova , Ildar A. Mustafin , Yuriy I. Baluda , Gulsum S. Usmanova , Ivan S. Zhidkov , Nadezhda N. Dremova , Pavel A. Troshin , Olga A. Kraevaya , Sergey M. Aldoshin , Akhat G. Mustafin

{"title":"Sulfur-decorated polyaniline-nanotube composites as cathode materials for lithium metal batteries","authors":"Lyaysan R. Latypova , Ildar A. Mustafin , Yuriy I. Baluda , Gulsum S. Usmanova , Ivan S. Zhidkov , Nadezhda N. Dremova , Pavel A. Troshin , Olga A. Kraevaya , Sergey M. Aldoshin , Akhat G. Mustafin","doi":"10.1016/j.synthmet.2025.117895","DOIUrl":"10.1016/j.synthmet.2025.117895","url":null,"abstract":"<div><div>Various composites of polyaniline (PANI) and polyanisidine (PAnis) with multi-walled carbon nanotubes (MWCNTs) and sulfur have been prepared using a simple one-pot and single-step strategy based on <em>in situ</em> chemical polymerization of aniline monomers in the presence of sulfur, MWCNTs and ammonium persulfate. The resulting composites contained 0 % to ∼25 % sulfur by weight and were characterized with nitrogen adsorption-desorption isotherms, thermogravimetric analysis, scanning electron microscopy with elemental mapping. Since most of the results for PANI/sulfur composites were reported for sulfur-rich systems (>40 %), the aim of this work was to investigate, for the first time, the obtained composites with low sulfur content as cathodes for metal-ion batteries. The utilization of both nanotubes and sulfur is beneficial for PANI-based electrode materials and enables better cycling stability, redox process reversibility and higher specific capacity. As a result, PANI/MWCNTs/S composite demonstrated a specific discharge capacity of 165 mAh g<sup>−1</sup> at the current density of 100 mA g<sup>−1</sup> and an average discharge potential of 2.4 V. Furthermore, we have shown the feasibility of the fabrication of potassium batteries using PANI- or PAnis-based composite cathodes, which paves a way to the development of inexpensive and scalable post-lithium battery technology.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117895"},"PeriodicalIF":4.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Magneto-dielectrically modified composites of vanadium doped Cd0.35Zn0.65VxFe2−xO4 spinel ferrites and graphene nanoplatelets 钒掺杂Cd0.35Zn0.65VxFe2−xO4尖晶石铁氧体和石墨烯纳米片的磁介电修饰复合材料

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-26 DOI: 10.1016/j.synthmet.2025.117893

Nazim Ali, Nasir Amin, Muhammad Ajaz-un-Nabi, Muhammad Imran Arshad

{"title":"Magneto-dielectrically modified composites of vanadium doped Cd0.35Zn0.65VxFe2−xO4 spinel ferrites and graphene nanoplatelets","authors":"Nazim Ali, Nasir Amin, Muhammad Ajaz-un-Nabi, Muhammad Imran Arshad","doi":"10.1016/j.synthmet.2025.117893","DOIUrl":"10.1016/j.synthmet.2025.117893","url":null,"abstract":"<div><div>This study investigates the structural, magnetic, and dielectric properties of composites having the chemical formula <span><math><mrow><msub><mrow><mi>Cd</mi></mrow><mrow><mn>0.35</mn></mrow></msub><msub><mrow><mi>Zn</mi></mrow><mrow><mn>0.65</mn></mrow></msub><msub><mrow><mi>V</mi></mrow><mrow><mi>x</mi></mrow></msub><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>4</mn></mrow></msub><mspace></mspace><mrow><mfenced><mrow><mi>x</mi><mo>=</mo><mn>0.0</mn><mo>,</mo><mspace></mspace><mn>0.03</mn></mrow></mfenced></mrow></mrow></math></span>/Graphene nanoplatelets (GNP =1.25 wt%, 2.5 wt%, 3.75 wt%, and 5 wt%) synthesized <em>via</em> a sol-gel auto-combustion method by following the bath sonication. X-ray diffraction (XRD) confirms the spinel matrix, showing lattice expansion at lower GNP concentrations and contraction at 5 wt%GNP. The crystallite size was 35.9 nm for 5 wt%GNP. Magnetic analysis revealed improved saturation magnetization (M<sub>S</sub> = 9.14 emu/g) and coercivity (Hc = 128.01 Oe) for 5 wt%GNP. Dielectric studies show reduced dielectric loss and improved quality factors, making the composites suitable for high-frequency applications. The optimized 5 wt%GNP composite exhibits a balance between structural stability, magnetic response, and dielectric performance, demonstrating its potential for electromagnetic and energy storage applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117893"},"PeriodicalIF":4.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Impact of different aromatic side units on benzodithiophene on the optical, electronic, and photovoltaic properties for organic solar cell applications 苯并二噻吩上不同芳香侧基对有机太阳能电池光学、电子和光电性能的影响

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-20 DOI: 10.1016/j.synthmet.2025.117890

Sultan Taskaya Aslan , Elif Demir Arabacı , Oguzhan Karakurt , Duygu Cevher , Eda Alemdar Yılmaz , Duygu Yalvac , Dilber Esra Yıldız , Ali Cirpan

{"title":"Impact of different aromatic side units on benzodithiophene on the optical, electronic, and photovoltaic properties for organic solar cell applications","authors":"Sultan Taskaya Aslan , Elif Demir Arabacı , Oguzhan Karakurt , Duygu Cevher , Eda Alemdar Yılmaz , Duygu Yalvac , Dilber Esra Yıldız , Ali Cirpan","doi":"10.1016/j.synthmet.2025.117890","DOIUrl":"10.1016/j.synthmet.2025.117890","url":null,"abstract":"<div><div>This study investigates the influence of different aromatic side groups on the 2D-benzodithiophene (BDT) unit in donor–acceptor conjugated polymers for organic solar cell (OSC) applications. Three new polymers, <strong>P1</strong>, <strong>P2</strong>, and <strong>P3</strong>, featuring phenyl, thienyl, and thienothienyl side chains on the 2D-BDT backbone, respectively, were synthesized using the Stille cross-coupling reaction. The benzotriazole (BTz) unit served as the electron acceptor with a selenophene π-bridge to enhance electronic interactions. The optical band gaps were determined to be 1.79 eV, 1.74 eV, and 1.73 eV for <strong>P1</strong>, <strong>P2</strong>, and <strong>P3</strong>, respectively. OSCs fabricated using these polymers and PC<sub>71</sub>BM as the acceptor showed the best performance for the thienyl-substituted polymer (<strong>P2</strong>), achieving a PCE of 4.34 % with a J<sub>SC</sub> of 10.08 mA/cm<sup>2</sup>, an V<sub>OC</sub> of 0.67 V, and a FF of 64 %. Compared to <strong>P1</strong> and <strong>P3</strong>, the <strong>P2</strong>-based blend exhibited a more defined interpenetrating network with PC<sub>71</sub>BM, enhancing charge transport and promoting exciton dissociation due to its thinner active layer and optimized morphology. These findings highlight the importance of side-chain engineering in improving the optoelectronic properties, morphology, and photovoltaic performance of OSCs. This study highlights the critical role of side-chain engineering in tuning the optoelectronic properties, morphology, and performance of OSCs. The findings emphasize that thienyl side chains in <strong>P2</strong> facilitate better π–π stacking and molecular organization, resulting in superior device performance compared to phenyl and thienothienyl-substituted counterparts.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117890"},"PeriodicalIF":4.0,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A morphology-dependent study of V2O5@rGO nanocomposite-based chemiresistive room temperature gas sensor for detecting NO2 基于V2O5@rGO纳米复合材料的化学电阻室温NO2气体传感器的形貌依赖性研究

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-19 DOI: 10.1016/j.synthmet.2025.117891

Mahesh A. Takte , Gopal M. Chavhan , Akash V. Fulari , Meng-Lin Tsai , Tibor Hianik , Mahendra D. Shirsat

{"title":"A morphology-dependent study of V2O5@rGO nanocomposite-based chemiresistive room temperature gas sensor for detecting NO2","authors":"Mahesh A. Takte , Gopal M. Chavhan , Akash V. Fulari , Meng-Lin Tsai , Tibor Hianik , Mahendra D. Shirsat","doi":"10.1016/j.synthmet.2025.117891","DOIUrl":"10.1016/j.synthmet.2025.117891","url":null,"abstract":"<div><div>We performed the shape-selective analysis of two different morphologies of mesoporous vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>) composite containing reduced graphene oxide (rGO), namely nanorods (V<sub>2</sub>O<sub>5</sub>NR@rGO) and nanoparticles (V<sub>2</sub>O<sub>5</sub>NP@rGO), respectively, as an efficient nitrogen dioxide sensor (NO<sub>2</sub>). We have shown that the sensor's response highly depends on the sample's morphology, which can be described by the combined effect of surface area, pore size/distribution, crystallinity, and surface defects. The V<sub>2</sub>O<sub>5</sub>NR@rGO composite showed higher sensitivity with faster response and recovery times than the V<sub>2</sub>O<sub>5</sub>NP@rGO composite. The response of the sensors at ambient conditions can be attributed to the fast charge carrier mobility of rGO at room temperature (RT). The proposed gas sensor exhibited excellent stability, higher sensitivity, high repeatability, and better selectivity towards different gases with an acceptable detection limit (LOD) of <em>1.33 ppm</em> and <em>2.32 ppm</em> for V<sub>2</sub>O<sub>5</sub>NR@rGO and V<sub>2</sub>O<sub>5</sub>NP@rGO, respectively. These properties reveal the sensor's wonderful potential for real-time detection of NO<sub>2</sub>.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117891"},"PeriodicalIF":4.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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-sensitivity and durable MWCNT@CuNp/silicone rubber flexible strain sensor for human motion detection and composite structural monitoring 高灵敏度，耐用MWCNT@CuNp/硅橡胶柔性应变传感器，用于人体运动检测和复合结构监测

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-18 DOI: 10.1016/j.synthmet.2025.117892

Muhammad Luthfi Hakim , Rela Adi Himarosa , Hasan Mastrisiswadi , Andri Nasution , Ardi Jati Nugroho Putro , Muhammad Akhsin Muflikhun , Herianto

{"title":"High-sensitivity and durable MWCNT@CuNp/silicone rubber flexible strain sensor for human motion detection and composite structural monitoring","authors":"Muhammad Luthfi Hakim , Rela Adi Himarosa , Hasan Mastrisiswadi , Andri Nasution , Ardi Jati Nugroho Putro , Muhammad Akhsin Muflikhun , Herianto","doi":"10.1016/j.synthmet.2025.117892","DOIUrl":"10.1016/j.synthmet.2025.117892","url":null,"abstract":"<div><div>Flexible strain sensors have attracted wide attention in various applications, such as wearable electronic devices, human motion detection, and soft robotics, due to their ability to measure mechanical deformation with a high degree of adaptability. In this study, we developed a silicon-based flexible strain sensor with a three-layer sandwich structure consisting of a silicon rubber substrate and MWCNT@CuNPs conductive material. The mixing of multi-walled carbon nanotubes (MWCNTs) and copper nanoparticles (CuNPs) aims to improve the electrical conductivity, sensitivity, and mechanical stability of the sensor. The sensor using MWCNT@CuNp material shows a sensitivity improvement of about 200 % compared to the SR@MWCNT@AgNp sensor, indicating superior electromechanical performance. The MWCNT@CuNp sensor test results show that the sensor has a measuring factor (GF) of 8.09 with high linearity (R² = 0.99) in the 0–80 % strain range. Mechanical durability tests showed that the sensor was able to withstand up to 1,200 loading and unloading cycles without significant performance degradation, proving its reliability for applications with repetitive strain. In addition, this sensor shows potential to be applied to various systems that require high sensitivity, good linearity, and superior mechanical durability. This sensor can not only be used in electronic skin to detect finger, wrist, elbow, and knee movements but also plays a role in monitoring strain changes in PLA/fiber glass/PLA composite materials during bending tests. These capabilities open opportunities for MWCNT@CuNPs sensors to be integrated in various engineering applications and smart material technologies.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117892"},"PeriodicalIF":4.0,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Impact of the molecular size of the perylenediimide-derived electron transport materials on the efficiency and stability of p-i-n perovskite solar cells 过二酰亚胺衍生电子传输材料的分子尺寸对p-i-n钙钛矿太阳能电池效率和稳定性的影响

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-14 DOI: 10.1016/j.synthmet.2025.117888

Azat F. Akbulatov , Polina G. Novkina , Nikita A. Emelianov , Evgenia P. Antoshkina , Al'bert N. Galiullin , Nikita A. Slesarenko , Ekaterina A. Khakina , Olga A. Kraevaya , Sergey A. Kuklin , Pavel A. Troshin

{"title":"Impact of the molecular size of the perylenediimide-derived electron transport materials on the efficiency and stability of p-i-n perovskite solar cells","authors":"Azat F. Akbulatov , Polina G. Novkina , Nikita A. Emelianov , Evgenia P. Antoshkina , Al'bert N. Galiullin , Nikita A. Slesarenko , Ekaterina A. Khakina , Olga A. Kraevaya , Sergey A. Kuklin , Pavel A. Troshin","doi":"10.1016/j.synthmet.2025.117888","DOIUrl":"10.1016/j.synthmet.2025.117888","url":null,"abstract":"<div><div>Herein, we report the synthesis and application of a series of perylenediimide (PDI) derivatives with octyldodecyl substituents, including a PDI monomer, formal dimer, and polymer obtained via thiophene block-mediated dimerization and polymerization. Infrared-scattering scanning near-field optical microscopy (IR s-SNOM) characterization demonstrated that, compared to monomeric and dimeric PDIs, the PDI polymer forms significantly more uniform films with reduced defect density, indicating that increasing molecular weight improves the surface coverage of the perovskite layer. Consequently, PSCs incorporating polymeric PDI as the ETL exhibited the best photovoltaic performance, while monomeric PDI-based devices showed the lowest efficiency due to poor film quality. These findings highlight the promising potential of macromolecular PDI-based ETLs for achieving further advancements in perovskite photovoltaics.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117888"},"PeriodicalIF":4.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Highly efficient inverted phosphorescent organic light-emitting devices with Li-doped ZnO nanoparticles li掺杂ZnO纳米粒子的高效倒转磷光有机发光器件

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-14 DOI: 10.1016/j.synthmet.2025.117889

Hwan-Jin Yoo, Go-Eun Kim, Hee-Jin Park, Chan-Jun Park, Su-Been Lee, Seo-Young Kim, Dae-Gyu Moon

{"title":"Highly efficient inverted phosphorescent organic light-emitting devices with Li-doped ZnO nanoparticles","authors":"Hwan-Jin Yoo, Go-Eun Kim, Hee-Jin Park, Chan-Jun Park, Su-Been Lee, Seo-Young Kim, Dae-Gyu Moon","doi":"10.1016/j.synthmet.2025.117889","DOIUrl":"10.1016/j.synthmet.2025.117889","url":null,"abstract":"<div><div>Inverted organic light-emitting devices (OLEDs) have attracted much attention due to their superior characteristics such as high stability, low brightness drop, and low driving voltage in display applications. To improve the charge balance that has been known as a critical issue in inverted OLEDs, Li-doped ZnO nanoparticle electron injection layer was investigated. Hexagonal wurtzite-structured Li-doped ZnO nanoparticles were synthesized using zinc acetate dihydrate, ammonium hydroxide pentahydrate, and lithium chloride. The particle size of the nanoparticles decreases with Li doping, exhibiting particle sizes of 4.1, 3.7, and 3.3 nm for the undoped, 10 % and 15 % Li-doped nanoparticles, respectively. The band gap, conduction band minimum and valence band maximum energy, photoluminescence in the visible region, surface roughness, and electrical conduction characteristics of the Li-doped ZnO nanoparticles were investigated. The inverted phosphorescent devices were prepared using the synthesized nanoparticles. The inverted devices with Li-doped nanoparticles exhibited higher external quantum efficiency (EQE) due to better charge balance. The maximum EQE of 18.2 % was achieved in the 15 % Li-doped device.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117889"},"PeriodicalIF":4.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Transparent film of carbon nanotubes/Ni(OH)2 nanocomposite for application in alkaline batteries 碳纳米管/Ni(OH)2纳米复合材料透明膜在碱性电池中的应用

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-14 DOI: 10.1016/j.synthmet.2025.117886

Daniela Z. Mezalira , Eduardo G.C. Neiva , Aldo J.G. Zarbin

{"title":"Transparent film of carbon nanotubes/Ni(OH)2 nanocomposite for application in alkaline batteries","authors":"Daniela Z. Mezalira , Eduardo G.C. Neiva , Aldo J.G. Zarbin","doi":"10.1016/j.synthmet.2025.117886","DOIUrl":"10.1016/j.synthmet.2025.117886","url":null,"abstract":"<div><div>A nanocomposite composed of multi-walled carbon nanotubes (MWCNTs) and Ni(OH)₂ nanoparticles was synthesized, characterized, and processed into thin films for application as cathodes in alkaline batteries. The synthesis was carried out using a modified polyol method, and the thin film was prepared by the liquid-liquid interfacial route (LLIR), enabling uniform film deposition. Structural analysis revealed the formation of α-phase Ni(OH)<sub>2</sub> nanoparticles, which is particularly advantageous for electrochemical applications due to the larger interlayer distances. The presence of MWCNT during synthesis led to significant reduction in Ni(OH)₂ particle size (10–20 nm) compared to the neat Ni(OH)<sub>2</sub> prepared as control (50–80 nm), indicating a nucleating effect induced by MWCNT. The resulting nanocomposite thin film showed high homogeneity, an optical transmittance of 86.3 % at a wavelength of 550 nm, and a thickness of 111 ± 28 nm. Electrochemical measurements in 1 mol L<sup>−1</sup> NaOH solution revealed battery-like charge-discharge behavior in both MWCNT/Ni(OH)<sub>2</sub> and Ni(OH)<sub>2</sub> films. The nanocomposite achieved higher specific capacities, reaching ∼105 mA h g<sup>−1</sup> at 2.8 A g<sup>−1</sup> and ∼ 40 mA h g<sup>−1</sup> at 56 A g<sup>−1</sup>, due to improved conductivity and reduced particle size. In addition, the MWCNT/Ni(OH)<sub>2</sub> exhibited a superior charge-discharge cycling stability, retaining 74 % of its capacity over 2000 cycles at 14 A g<sup>−1</sup>, compared to 65 % for the Ni(OH)<sub>2</sub> control film at 8.2 A g<sup>−1</sup>. This stability at high current rates highlights the MWCNT/Ni(OH)<sub>2</sub> nanocomposite thin film as a promising candidate for high-power energy storage and fast charge delivery applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"313 ","pages":"Article 117886"},"PeriodicalIF":4.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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