Journal of Materials Science: Materials in Electronics最新文献

{"title":"Sm3+-activated Sr2MgMoO6 red phosphors for high-contrast latent fingerprint visualization and white light-emitting diodes","authors":"Bin Zhao,&nbsp;You Xu,&nbsp;Xin Yang,&nbsp;Xiujuan Huang,&nbsp;Zhixin Xiang,&nbsp;Zihan Qiao,&nbsp;Ruijin Yu,&nbsp;Maosen Yuan,&nbsp;Qin Tu","doi":"10.1007/s10854-026-18624-8","DOIUrl":"10.1007/s10854-026-18624-8","url":null,"abstract":"<div><p>A novel series of Sm³⁺-doped Sr₂MgMoO₆ (SMMO:Sm³⁺) phosphors were successfully synthesized via a precision-controlled high-temperature solid-state reaction methodology. Systematic investigations into the crystalline architecture, surface topography, and photoluminescence dynamics were conducted to evaluate their potential for advanced forensic applications. Upon near-ultraviolet excitation at 397 nm, the SMMO: Sm³⁺ materials exhibit an intense, narrowband red-emitting peak at 644 nm, resulting from the intra-4<i>f</i> electronic transition of Sm³⁺ activators from the ⁴G_5/2 to the ⁶H_9/2 level. The emission intensity reached its optimized at a critical doping concentration of 15 mol%. Based on Dexter’s theoretical framework, the dominant quenching mechanism was identified as nearest-neighbor ion interaction. These phosphors demonstrate exceptional color purity exceeding 98.5%, with chromaticity coordinates strategically located in the orange-red spectral region. Furthermore, SMMO:Sm³⁺ exhibited good stability in 300–480 K, with luminescent intensity remaining 55.7% at 420 K compared to room temperature (300 K). Practical application in forensic science demonstrated that the Sr₂MgMoO₆:15 mol%Sm³⁺ phosphor enables high-resolution visualization of latent fingerprints across diverse substrates, facilitating the identification of Level I through Level III ridge features. The internal quantum efficiency (IQE) of SMMO:Sm³⁺ is 23.7%. Both red and white light-emitting diodes (LEDs) were prepared using SMMO:Sm³⁺. The chromaticity coordinates of w-LED were measured as (0.3433, 0.3329), correlating to a correlated color temperature (CCT) of 5006 K and exhibiting a good color rendering index (CRI, <i>R</i>_a = 94).</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-enzymatic electrochemical detection of H2O2 using a green-synthesized rGO–liposome composite on gold thin films","authors":"Mohammad R. Ahmad,&nbsp;Anees A. Ansari,&nbsp;Juhi Jaiswal,&nbsp;S. k. Saidul,&nbsp;Marshal Dhayal","doi":"10.1007/s10854-026-18646-2","DOIUrl":"10.1007/s10854-026-18646-2","url":null,"abstract":"<div><p>Electrochemical sensing platforms based on reduced graphene oxide (rGO) have attracted significant attention for the detection of redox-active analytes owing to their high surface area, tunable conductivity, and facile surface functionalization. In this work, we report a hydrothermal-assisted green route using the ethanolic <i>neem</i> leaf extract method for the synthesis of rGO and preparation of a biocompatible liposome–rGO effective sensing platform for non-enzymatic electrochemical hydrogen peroxide (H₂O₂) sensing. Liposomes were synthesized through a thin-film hydration method using egg yolk-derived lecithin and subsequently integrated with rGO to form a stable aqueous dispersion, as evidenced by zeta potential measurements. The synthesis of rGO was confirmed by XRD, Raman, UV–Vis, FTIR, and electron microscopy analyses with restored sp² carbon domains. Electrochemical performance toward H₂O₂ was evaluated using cyclic voltammetry in phosphate-buffered saline. The sensor exhibited a linear response in the concentration range of 10–90 μM with a limit of detection of 10 μM. Scan rate-dependent studies revealed diffusion-controlled, quasi-reversible electron transfer behavior, indicating efficient charge transport across the liposome–rGO/Au interface. The synergistic combination of green-synthesized rGO, biocompatible liposomes, and a gold thin-film electrode provides an environmentally benign and effective sensing platform for non-enzymatic H₂O₂ detection, demonstrating potential for future biosensing and analytical applications.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of annealing atmosphere on the microstructure and properties of Hf-doped BiFeO3 thin films","authors":"Shuhui Sun,&nbsp;Yujie Xu,&nbsp;Haixia Zhang,&nbsp;Zhenfeng Jing,&nbsp;Sen Zhang,&nbsp;Xingfu Li,&nbsp;Quanxin Guo,&nbsp;Haoyu Shi,&nbsp;Jing Li,&nbsp;Fengqing Zhang","doi":"10.1007/s10854-026-18509-w","DOIUrl":"10.1007/s10854-026-18509-w","url":null,"abstract":"<div><p>BiFe_1−XHf_XO₃ (X = 1.2 mol%, abbreviated as BFHO) thin films were deposited on ITO/glass substrates using the sol–gel method and subsequently post-annealed in O₂, air, and N₂ atmospheres, respectively. This study systematically investigates the effects of different annealing atmospheres on the microstructure, defect chemistry, and electrical properties of BFHO thin films, with particular emphasis on the correlations among oxygen vacancy concentration, ferroelectric behavior, leakage current characteristics, conduction mechanisms, dielectric properties, and aging behavior. The results demonstrate that films annealed in an O₂ atmosphere exhibit the best crystallinity and most well-developed grain morphology, along with the lowest concentrations of Fe²⁺ ions and oxygen vacancies. Owing to the effective suppression of defects, the O₂-annealed films show significantly enhanced ferroelectric performance and the lowest leakage current density. Leakage current analysis reveals that Fowler–Nordheim (F–N) tunneling is the dominant conduction mechanism. Furthermore, a theoretical aging model based on the volumetric effect is developed to provide insight into the physical mechanism underlying the aging behavior of BFHO thin films. Compared to films annealed in air and nitrogen, the oxygen-annealed films exhibit the smallest degree of aging and demonstrate excellent electrical stability.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Broad-spectrum CeVZn-BaTiO3 photocatalysts for efficient photodegradation of Rose Bengal and ciprofloxacin pollutants","authors":"Nabil Al-Zaqri,&nbsp;Ali Al-Harbi,&nbsp;Saleh Maodaa,&nbsp;Hanan Alghibiwi","doi":"10.1007/s10854-026-18660-4","DOIUrl":"10.1007/s10854-026-18660-4","url":null,"abstract":"<div><p>Dyes and pharmaceutical compounds discharged into water bodies cause widespread environmental pollution and pose significant health threats. This research demonstrates the synthesis and characterization of new Ba_0.97Ce_0.03Ti_0.97M_0.03O₃ (M = V and Zn) photocatalysts for efficient degradation of hazardous Rose Bengal and ciprofloxacin contaminants under sunlight and visible light irradiation. As confirmed by X-ray diffraction analysis (XRD), the synthesized compositions exhibited a single tetragonal phase of BaTiO₃ structure. The optical bandgap energies of BaTiO₃, Ba_0.97Ce_0.03Ti_0.97V_0.03O_3, and Ba_0.97Ce_0.03Ti_0.97Zn_0.03O₃ catalysts were estimated to be 3.1, 2.85, and 2.75 eV, respectively. The high-resolution X-ray photoelectron (XPS) of Ba_0.97Ce_0.03Ti_0.97Zn_0.03O₃ verifies the presence of oxygen defects and mixed oxidation states of Ti³⁺/Ti⁴⁺ and Ce³⁺/Ce⁴⁺ cations. The elemental mapping images showed the uniform distribution of Ce and Zn dopants into Ba_0.97Ce_0.03Ti_0.97Zn_0.03O₃ powder. After 36 min of sunlight irradiation, the photodegradation efficiency of BaTiO₃, Ba_0.97Ce_0.03Ti_0.97V_0.03O_3, and Ba_0.97Ce_0.03Ti_0.97Zn_0.03O₃ compositions for removal of 15 ppm Rose Bengal dye was 42, 79, and 98%, respectively. On the other hand, the decrease in the absorbance of ciprofloxacin antibiotic indicated that these photocatalysts have a photodegradation efficiency of 44, 87, and 96% after 48 min of sunlight irradiation, respectively. The measurements of chemical oxygen demand (COD) and total organic carbon (TOC) revealed the high mineralization of Rose Bengal and ciprofloxacin contaminants to CO₂ and H₂O. Besides, the successive reusability tests infer that the used Ba_0.97Ce_0.03Ti_0.97Zn_0.03O₃ photocatalyst has a high stability and can be reused for many degradation runs during the environmental wastewater treatment.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vertically aligned large-area CVD-grown MoS2 nanoflake-based heterojunction for UV–Vis range photodetection: an electrical study","authors":"Pallavi Gupta,&nbsp;Sandeep Chhoker","doi":"10.1007/s10854-026-18609-7","DOIUrl":"10.1007/s10854-026-18609-7","url":null,"abstract":"<div><p>Photodetectors based on two-dimensional transition-metal dichalcogenides (TMDs) have attracted significant attention due to their unique optical and electronic properties, including a tuneable (direct to indirect) bandgap transition and varying light–matter interaction in different wavelength ranges. Amongst these, molybdenum disulphide (<span>({MoS}_{2}))</span> is one of the intriguing 2D materials for optoelectronic devices for the future. We report an Al/<span>({n-MoS}_{2})</span>/p-Si heterojunction-based photodetector and its detailed electrical studies including C–V and G–V measurements. The uniform and large-area (2 cm²) <span>({n-MoS}_{2})</span> has been synthesized via a single-zone chemical vapour deposition (CVD) process utilizing sulphurization of α-MoO₃ under inert atmosphere. FE-SEM studies revealed the uniform large area as well as vertically aligned flaky morphology (tip width ~10–20 nm), while the presence of crystalline and multilayers of <span>({n-MoS}_{2})</span> verified to have strong intercoupling, using Raman spectroscopy, wherein characteristic in-plane <span>({E}_{2g}^{1})</span> and out-of-plane <span>({A}_{1g})</span> vibrational modes with separation of 24 cm⁻¹ are reported. The detailed electrical measurement of the vertically layered device was carried out up to 10 V bias under Dark, UV and Visible illumination from frequency range 100 kHz to 1 MHz to elucidate the photogenerated charge transport and interfacial properties. The I–V characteristic indicated predominantly ohmic behaviour at the metal/semiconductor interface, suggesting efficient carrier injection. Under illumination, the device exhibited enhanced current conduction, with the conductance increasing by 14.8% under UV illumination and 2.8% under visible illumination compared to dark conditions. The device’s enhanced photo response characteristics are demonstrated by the significant enhancement under UV exposure, which is ascribed to the formation of a higher density of photogenerated charge carrier due to the enhanced photon energy and larger density of electrons at the tips which are available due to vertical alignment. Interface trap states were found in the C–V and G–V under different frequencies ranges investigated, suggesting that a trapping mechanism that influences carrier dynamics across the device and ultimately dictates the appropriate PN junction performance. The Al/<span>({n-MoS}_{2})</span>/p-Si structure promised for photodetection application is highlighted by the obtained result, which also emphasizes the crucial role of interface traps to determined device performance.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron irradiation-induced defect evolution and its impact on the structural and optical properties of GaAs(O):Cr","authors":"M. Yu. Tashmetov,&nbsp;Kh.N. Djangabaev","doi":"10.1007/s10854-026-18631-9","DOIUrl":"10.1007/s10854-026-18631-9","url":null,"abstract":"<div><p>The influence of 2 MeV electron irradiation at fluences of 4×10¹⁷–6×10¹⁷ e/cm² on the structural, optical, morphological, and luminescent properties of GaAs(O):Cr crystals was investigated. X-ray diffraction analysis (XRD) confirmed the preservation of the cubic zinc-blende structure, while the lattice microstrain increased from 0.76×10^–3 to 2.39×10^–3 and the average crystallite size increased from 55.84 to 61.81 nm. Optical studies revealed a monotonic increase in the band gap from 1.346 to 1.359 eV accompanied by a decrease in the Urbach energy from 237 to 169 meV, indicating a redistribution of localized defect states. Atomic force microscopy (AFM) demonstrated an increase in surface roughness, with the root-mean-square roughness (RMS) increasing from 9.55 to 13.49 nm and the R_<i>z</i> parameter from 78.43 to 118.70 nm, reflecting the accumulation of radiation-induced defects. Photoluminescence (PL) measurements revealed a shift of the emission maximum from ~1.47 to ~1.46 eV together with an increase in emission intensity, indicating modifications of localized electronic states and carrier recombination processes. The obtained results demonstrate that high-fluence electron irradiation induces a significant restructuring of the defect subsystem and the associated structural, electronic, optical, and morphological properties of GaAs(O):Cr.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning the structural and optoelectronic properties of Cs3Bi2I9 through MA+/FA+ incorporation","authors":"Mohit Singh,&nbsp;J. P. Tiwari","doi":"10.1007/s10854-026-18625-7","DOIUrl":"10.1007/s10854-026-18625-7","url":null,"abstract":"<div><p>Bismuth-based halide perovskites have emerged as promising lead-free alternatives to conventional Pb-based optoelectronic materials because of their low toxicity, enhanced environmental compatibility, and superior chemical stability. Growing concerns regarding the toxicity and long-term instability of lead halide perovskites have accelerated research into environmentally benign perovskite materials. Amongst these, the vacancy-ordered inorganic perovskite Cs₃Bi₂I₉ has attracted considerable attention owing to its excellent moisture resistance, thermal stability, and non-toxic nature. In this work, pristine and MA⁺/FA⁺ simultaneously co-doped Cs₃Bi₂I₉ perovskites were successfully synthesized and systematically investigated. Structural analysis confirmed the formation of the crystalline perovskite phase, revealed slight structural modifications upon doping, and examined the surface morphology and grain distribution. Optical studies show tuneable absorption behaviour, with bandgap and Urbach energy reductions from ~2.09 to ~1.95 eV and ~0.180 to ~0.094 eV with increasing organic cation concentration. Raman spectra indicate changes in vibrational modes associated with structural interactions between organic cations and the inorganic structure. Thermal stability indicates the robustness of the perovskite, and I-V characteristics and space-charge-limited current (SCLC) measurements revealed increased mobility from ~6.95 × 10^–5 to ~1.94 × 10^–4 cm² V⁻¹ S⁻¹, reduced trap density, and enhanced conductivity after doping. These results demonstrate that MA⁺/FA⁺ simultaneous co-doping effectively tailors the structural, optical, thermal, and electrical properties of Cs₃Bi₂I₉, providing an effective strategy for enhancing the performance of lead-free bismuth-based perovskites for future optoelectronic applications.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reliability evaluation of Pb-free solder joints combining Sn-Bi-Ag and Sn-Ag-Cu solders","authors":"Jahyeon Kim,&nbsp;Dong-Yurl Yu,&nbsp;Sojeong Lee,&nbsp;Junhyuk Son,&nbsp;Won Bin Im,&nbsp;Yong-Ho Ko","doi":"10.1007/s10854-026-18659-x","DOIUrl":"10.1007/s10854-026-18659-x","url":null,"abstract":"<div><p>Pb-free solder joints combining Sn-3.0Ag-0.5Cu (SAC305) solder balls with low-melting-temperature Sn-57Bi-1Ag solder paste offer a potential approach to reducing reflow temperature while maintaining joint reliability. However, the effects of reflow temperature on Bi redistribution, interfacial reactions, and mechanical reliability remain insufficiently understood. In this study, SAC305/Sn-57Bi-1Ag solder joints were fabricated using three reflow profiles with peak temperatures of approximately 190, 210, and 260 °C. Joint microstructures and elemental distributions were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and electron probe microanalysis. Reliability was evaluated by thermal shock testing from − 40 to 85 °C for up to 2,000 cycles, followed by low-speed shear testing and fracture analysis. Bi diffusion was limited in the as-reflowed Type 1 and Type 2 joints became more pronounced toward the package side with increasing thermal shock cycles, whereas Bi was uniformly distributed in the Type 3 joints because of the higher reflow temperature. Cu₆Sn₅ and (Cu, Ni)₆Sn₅ intermetallic compounds formed at the package and PCB interfaces, respectively, and their thicknesses changed with thermal shock cycling. The shear strength of the Type 1 and Type 3 joints decreased during thermal shock testing, whereas that of the Type 2 joints gradually increased. Fracture analysis further revealed reflow-condition-dependent changes in fracture location. These results demonstrate that reflow temperature strongly influences Bi redistribution, interfacial evolution, and the mechanical reliability of SAC305/Sn-57Bi-1Ag solder joints.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphology-controlled assembly of silver microstructures for conductive silver paste","authors":"Ruimin Li,&nbsp;Zhu Xiao","doi":"10.1007/s10854-026-18634-6","DOIUrl":"10.1007/s10854-026-18634-6","url":null,"abstract":"<div><p>Conductive silver paste is widely used in photovoltaics and other microelectronic devices owing to its electrical conductivity and processing versatility. Morphology-specific synthesis of silver powder is important for paste formulation. In this study, uniform silver microspheres (Ag-MSs) and microflakes (Ag-MFs) were successfully synthesized via a facile one-step chemical reduction method by systematically tuning the concentrations of silver precursors, reductants, and dispersants. The resulting Ag-MSs exhibited smooth surfaces, excellent dispersion, and uniform particle size distribution, while Ag-MFs displayed thin planar morphologies with high specific surface areas. Structural and compositional analysis identified crystalline silver as the main phase of the as-prepared products. Sodium citrate dosage also influenced particle morphology and aggregation. The mean recovered powder masses from three independent batches were 194.7 mg for Ag-MSs and 34.2 mg for Ag-MFs, corresponding to apparent gravimetric recoveries of 90.2% and 64.7%. To evaluate practical applicability, Ag-MSs and Ag-MFs were composited in controlled ratios to fabricate hybrid conductive pastes. The mean two-terminal resistances of the cured coatings were 2374.0, 79.2 and 184.8 mΩ for Ag-MSs, Ag-MFs and Ag-MS₁MF₁, respectively. At the same total silver loading, the 1:1 hybrid used 50% less flake powder than the all-flake formulation while retaining a lower coating resistance than the sphere-only paste. These results provide a basis for selecting mixed-morphology silver fillers by considering synthesis-stage powder recovery together with coating resistance.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile synthesis of Fe2O3 decorated graphene nanocomposite: a sustainable approach towards efficient supercapacitor electrode","authors":"Suvarna K. Subrahmanian,&nbsp;Sea–Fue Wang,&nbsp;Binitha N. Narayanan","doi":"10.1007/s10854-026-18628-4","DOIUrl":"10.1007/s10854-026-18628-4","url":null,"abstract":"<div><p>A simple and environmentally benign strategy for developing a high-performance Fe₂O₃/graphene hybrid electrode for supercapacitor (SC) applications is presented here. Less-defective, edge-functionalized graphene prepared through sucrose-assisted mechanochemical exfoliation of graphite, avoiding strong oxidizing agents and a separate chemical reduction step, is used for the incorporation of Fe₂O₃ nanoparticles through hydrothermal treatment and calcination. Structural and morphological studies confirm the phase purity of α-Fe₂O₃, and favourable interfacial interactions between Fe₂O₃ nanoparticles and the less-defective, edge-functionalized graphene. The homogeneous distribution of Fe₂O₃ nanoparticles over the graphene sheets provides abundant electrochemically active sites and facilitates efficient charge transport, resulting in enhanced charge storage behaviour. Electrochemical evaluation in a three-electrode configuration demonstrates a specific capacitance of 214.7 F g⁻¹ at 2 A g⁻¹, with 86% of its initial capacitance retained after 4000 charge–discharge cycles at 10 Ag⁻¹, demonstrating good cycling stability. A symmetric pouch cell SC device fabricated using Fe₂O₃/graphene electrodes delivers a specific capacitance of 30 F g⁻¹ at 0.1 A g⁻¹, corresponding to an energy density of 4.16 Wh kg⁻¹ at a power density of 50 W kg⁻¹. The device retains 84.4% of its initial capacitance after 4500 cycles at 1 Ag⁻¹, and two devices connected in series successfully power 20 red light-emitting diodes. Overall, this study establishes a green and cost-effective route for fabricating Fe₂O₃/graphene hybrid electrodes with favourable electrochemical performance and cycling stability for SC applications.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}