Materials Science and Engineering: B最新文献

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Two-stage superlattice growth approach integrating two-dimensional polarization enhancement mechanism for optimized p-type heterostructures in AlGaN DUV-LEDs AlGaN DUV-LEDs优化p型异质结构的两阶段超晶格生长方法集成二维极化增强机制
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-11 DOI: 10.1016/j.mseb.2025.118601
Chandra Prakash Singh, Kankat Ghosh
{"title":"Two-stage superlattice growth approach integrating two-dimensional polarization enhancement mechanism for optimized p-type heterostructures in AlGaN DUV-LEDs","authors":"Chandra Prakash Singh,&nbsp;Kankat Ghosh","doi":"10.1016/j.mseb.2025.118601","DOIUrl":"10.1016/j.mseb.2025.118601","url":null,"abstract":"<div><div>Deep-ultraviolet (DUV) LEDs operating at ∼ 273  nm offers strong potential for disinfection applications, yet their wall-plug efficiency (WPE) remains limited due to suboptimal p-type heterostructures. In this study, we propose a two-dimensional polarization-enhanced mechanism using a two-stage superlattice (TSSL) growth approach to replace the conventional p-AlGaN hole injection layer. The first-stage consists of a short-period Al<sub>0.57</sub>Ga<sub>0.43</sub>N/Al<sub>0.47</sub>Ga<sub>0.53</sub>N superlattice, while the second-stage employs a long-period Al<sub>0.30</sub>Ga<sub>0.70</sub>N/Al<sub>0.15</sub>Ga<sub>0.85</sub>N superlattice. This structure enables enhanced Mg-activation, optimized band alignment, improved hole transport via polarization pockets, and enhanced optical transparency through higher Al-composition and quantum confinement effects. Compared to conventional designs, the TSSL architecture delivers a 3.4-fold increase in internal quantum efficiency, a 176 % rise in light output power, a 63 % reduction in efficiency droop, a 13 % drop in operating voltage, and reduced absorption losses. These improvements result in a significant enhancement in WPE, validating the effectiveness of the proposed growth strategy for high-performance AlGaN-based DUV emitters.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118601"},"PeriodicalIF":3.9,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595923","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
Electrically conductive zeolite/carbon nanotubes honeycomb monoliths for enhanced electric swing adsorption 导电性沸石/碳纳米管蜂窝单块体增强电振荡吸附
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-11 DOI: 10.1016/j.mseb.2025.118603
Eduardo Pérez-Botella , Ravi Sharma , Matthias Schoukens , Mohsen Gholami , Jessica Mangialetto , Joeri F.M. Denayer
{"title":"Electrically conductive zeolite/carbon nanotubes honeycomb monoliths for enhanced electric swing adsorption","authors":"Eduardo Pérez-Botella ,&nbsp;Ravi Sharma ,&nbsp;Matthias Schoukens ,&nbsp;Mohsen Gholami ,&nbsp;Jessica Mangialetto ,&nbsp;Joeri F.M. Denayer","doi":"10.1016/j.mseb.2025.118603","DOIUrl":"10.1016/j.mseb.2025.118603","url":null,"abstract":"<div><div>Electrification of temperature swing adsorption processes is necessary to align with the future energy paradigm. Joule heating has been identified as a viable method for regenerating adsorbent bed after saturation. In this work, we report the fabrication of novel composite monoliths with enhanced electrical properties for use in electrical swing adsorption (ESA) applications. In addition to zeolitic adsorbents (ZSM-5 or 13X) and binders, various amounts of multiwalled carbon nanotubes were added to tune the electrical conductivity of the composites. The monoliths were characterized in terms of their adsorption properties, electrical conductivity and Joule heating behavior. The most promising materials were further evaluated in ESA-based breakthrough experiments using synthetic flue gas (CO<sub>2</sub>/N<sub>2</sub> 15:85 v/v) and 1-butanol vapor. These tests demonstrated the general suitability of the these composites in ESA-based separation processes, achieving rapid heating (under 1 min.) to temperatures up to 235 °C.<!--> <!-->Overall, this study presents a simple and effective strategy for preparing electrically conducive monoliths capable of fast and efficient Joule heating, offering potential for scalable, energy-efficient separation technologies.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118603"},"PeriodicalIF":3.9,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605773","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
Tailoring thermoelectric properties of SnSe2 via layered composite formation with Bi2Se3 通过与Bi2Se3形成层状复合材料调整SnSe2的热电性能
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-11 DOI: 10.1016/j.mseb.2025.118604
Thi Huong Nguyen , Anh Tuan Pham , Van Quang Nguyen , Van Thiet Duong , Sudong Park , Sunglae Cho , Anh Tuan Duong
{"title":"Tailoring thermoelectric properties of SnSe2 via layered composite formation with Bi2Se3","authors":"Thi Huong Nguyen ,&nbsp;Anh Tuan Pham ,&nbsp;Van Quang Nguyen ,&nbsp;Van Thiet Duong ,&nbsp;Sudong Park ,&nbsp;Sunglae Cho ,&nbsp;Anh Tuan Duong","doi":"10.1016/j.mseb.2025.118604","DOIUrl":"10.1016/j.mseb.2025.118604","url":null,"abstract":"<div><div>In this study, the SnSe<sub>2</sub>-Bi<sub>2</sub>Se<sub>3</sub> layered composite crystals were successfully fabricated using a temperature gradient technique. The crystal structures were confirmed by X-ray diffraction, which revealed that SnSe<sub>2</sub> and Bi<sub>2</sub>Se<sub>3</sub> phases coexisted in a macroscopic lamellar morphology in the composite crystals. The effect of Bi<sub>2</sub>Se<sub>3</sub> content on the thermoelectric properties of SnSe<sub>2</sub> was systematically investigated in the temperature range of 300 – 623 K. Compared to pristine SnSe<sub>2</sub>, the n-type composite samples showed a notable increase in the electrical conductivity and a significant reduction in the thermal conductivity, which is likely attributed to enhanced phonon scattering at heterogeneous interfaces. However, the Seebeck coefficient decreased, leading to a lower <span><math><mrow><mi>ZT</mi></mrow></math></span> value than that of the pristine SnSe<sub>2</sub>. These results indicate that forming a layered composite with Bi<sub>2</sub>Se<sub>3</sub> is a potential way to improve specific thermoelectric parameters of SnSe<sub>2</sub>, though further optimization is required to enhance performance.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118604"},"PeriodicalIF":3.9,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595920","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
Enhancement of thermoelectric power factor in boron and graphene-doped strontium cobalt oxide nanoceramics via sol-gel synthesis 溶胶-凝胶法增强硼和石墨烯掺杂锶钴氧化物纳米陶瓷的热电功率因数
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-10 DOI: 10.1016/j.mseb.2025.118579
Emre Çınar , Serhat Koçyiğit , Arda Aytimur , Yosef Badali , lbrahim Uslu
{"title":"Enhancement of thermoelectric power factor in boron and graphene-doped strontium cobalt oxide nanoceramics via sol-gel synthesis","authors":"Emre Çınar ,&nbsp;Serhat Koçyiğit ,&nbsp;Arda Aytimur ,&nbsp;Yosef Badali ,&nbsp;lbrahim Uslu","doi":"10.1016/j.mseb.2025.118579","DOIUrl":"10.1016/j.mseb.2025.118579","url":null,"abstract":"<div><div>In this study, boron and graphene-doped cobalt oxide-based thermoelectric nanoceramic materials were produced and characterized using the sol–gel method. The samples, designated as NC-1, NC-2, and NC-3, were composed of Sr<sub>3</sub>Co<sub>4</sub>O<sub>α</sub>, Sr<sub>2.9</sub>B<sub>0.1</sub>Co<sub>4</sub>O<sub>α</sub>, and 1% graphene-doped Sr<sub>2.9</sub>B<sub>0.1</sub>Co<sub>4</sub>O<sub>α</sub>, respectively. The aim of the study was to investigate the effects of boron and graphene doping on the crystal structure, degradation temperature, and thermoelectric properties of the materials. Advanced characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and differential scanning calorimetry-thermogravimetric analysis (DSC-TGA), were employed. Additionally, thermoelectric properties were measured using a physical property measurement system (PPMS). XRD analysis identified orthorhombic (SrCO<sub>3</sub>) and hexagonal (Sr<sub>5</sub>Co<sub>4</sub>O<sub>12</sub>) structures, with NC-2 exhibiting only Sr<sub>5</sub>Co<sub>4</sub>O<sub>12</sub> peaks, indicating enhanced phase purity due to boron doping. SEM revealed predominantly spherical structures, with a noticeable reduction in particle diameter for NC-2 and NC-3, attributed to the synergistic effects of boron and graphene. TG analysis showed that boron doping increased the thermal degradation temperature, while graphene further improved thermal stability. NC-3 achieved the highest thermoelectric power factor, demonstrating the synergistic effect of boron and graphene co-doping. Although NC-2 outperformed NC-1, NC-3 exhibited superior performance, indicating that combined doping significantly enhances structural strength and thermoelectric properties.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118579"},"PeriodicalIF":3.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595922","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
Tailoring electrocatalytic activity of Ti/IrO2-Ta2O5 anodes via graphene incorporation for energy-efficient copper foil fabrication 通过石墨烯掺入调整Ti/IrO2-Ta2O5阳极的电催化活性,用于节能铜箔制造
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-10 DOI: 10.1016/j.mseb.2025.118586
Duoli Wu , Liao Xiang , Qingyang Zhang , Huaidong Zhang , Dayu Li , Chao Zhang
{"title":"Tailoring electrocatalytic activity of Ti/IrO2-Ta2O5 anodes via graphene incorporation for energy-efficient copper foil fabrication","authors":"Duoli Wu ,&nbsp;Liao Xiang ,&nbsp;Qingyang Zhang ,&nbsp;Huaidong Zhang ,&nbsp;Dayu Li ,&nbsp;Chao Zhang","doi":"10.1016/j.mseb.2025.118586","DOIUrl":"10.1016/j.mseb.2025.118586","url":null,"abstract":"<div><div>The development of energy-efficient electrocatalytic anodes is crucial for advancing electrolytic copper foil production, a key material in electronics and lithium-ion batteries. This study investigates the incorporation of graphene into Ti/IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub> coated anodes to reduce reliance on costly iridium while enhancing electrochemical performance. Using thermal decomposition, four anodes with fixed iridium content (26 g/m<sup>2</sup>) and varying graphene concentrations (0.2–0.8 mg/mL) were synthesized. Structural and morphological analyses via XRD, SEM, and EDS revealed uniform IrO<sub>2</sub> crystallization and graphene-induced agglomerates, while electrochemical tests (polarization curves, cyclic voltammetry, and impedance spectroscopy) demonstrated optimized performance at 0.6 mg/mL graphene. This composition achieved the lowest charge transfer resistance (2.92 Ω·cm<sup>2</sup>), highest voltammetric charge (187 mC/cm<sup>2</sup>), and superior oxygen evolution activity, attributed to balanced conductivity and active site distribution. Excessive graphene (&gt;0.6 mg/mL) led to aggregation and performance decline. The work provides a cost-effective strategy for designing durable, high-performance anodes for industrial copper foil fabrication.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118586"},"PeriodicalIF":3.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588908","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
Fabrication of Al-doped CIGS solar cell: The thickness-dependence of compositional, structural, optical, and photovoltaic properties 掺铝CIGS太阳能电池的制备:成分、结构、光学和光伏性能的厚度依赖性
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-10 DOI: 10.1016/j.mseb.2025.118598
Amani H. Alfaifi , Hind Saeed Alzahrani , S.H. Moustafa , Talaat A. Hameed
{"title":"Fabrication of Al-doped CIGS solar cell: The thickness-dependence of compositional, structural, optical, and photovoltaic properties","authors":"Amani H. Alfaifi ,&nbsp;Hind Saeed Alzahrani ,&nbsp;S.H. Moustafa ,&nbsp;Talaat A. Hameed","doi":"10.1016/j.mseb.2025.118598","DOIUrl":"10.1016/j.mseb.2025.118598","url":null,"abstract":"<div><div>This study presents solar cells fabricated with Al-doped CIGS employing a single-step sputtering process. The synergistic effect of Al doping and the streamlined deposition offers a simplified, scalable, and cost-effective approach, enhancing commercial viability by achieving a reduced cost-to-performance ratio. Cu (In, Ga, Al) Se<sub>2</sub> of various thicknesses were deposited by radio frequency RF/DC magnetron. Electron probe microanalysis (EPMA) established that Cu/(In + Ga + Al) is about 0.83 (i.e., &lt;1, Cu-poor CIGAS). CIGAS thin films adopted a chalcopyrite phase of preferred orientation along the (112) plane, as substantiated by both X-ray diffraction. The optical band gap varied from 1.64 to 1.37 eV, when the thickness was increased from 0.2 to 2.0 μm. A series of solar cell devices of configuration SLG/Mo/CIGAS/CdS/i-ZnO/AZO/MgF<sub>2</sub>/Ni-Al-Ni were fabricated containing a different thick absorber layer of CIGAS. The highest power conversion efficiency of 8.60 % was achieved by a 2.0 μm thick CIGAS layer deposited without post-selenization.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118598"},"PeriodicalIF":3.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588911","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
Influence of nitrogen concentration on the temperature sensing and resistor properties of TaN thin films at cryogenic temperatures 氮浓度对低温下TaN薄膜感温和电阻性能的影响
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-10 DOI: 10.1016/j.mseb.2025.118605
Md Tohidul Islam , Hasan Efeoglu
{"title":"Influence of nitrogen concentration on the temperature sensing and resistor properties of TaN thin films at cryogenic temperatures","authors":"Md Tohidul Islam ,&nbsp;Hasan Efeoglu","doi":"10.1016/j.mseb.2025.118605","DOIUrl":"10.1016/j.mseb.2025.118605","url":null,"abstract":"<div><div>Tantalum Nitride (TaN) thin films are popular for high-precision thin film resistors in several applications due to their nearly zero temperature coefficient of resistance (TCR) from room to high temperature. This study investigates the effect of nitrogen concentration on the temperature sensing and thin-film resistor capabilities of TaN thin films in the cryogenic temperature region (10 K to 320 K). The findings show that nitrogen concentration considerably impacts the stability and TCR of TaN thin films, making them suitable for various applications. Thin films fabricated with 4 and 6 sccm N<sub>2</sub> exhibited low TCR values of −360 ppm/K and −670 ppm/K, respectively, keeping stability over a broad temperature range and making them suitable for resistor applications ranging from cryogenic to high temperatures. The film fabricated with a Nitrogen concentration of 10 sccm exhibited a high TCR of −8498 ppm/K at 10 K, demonstrating its strong ability for temperature sensing applications. Additionally, the film fabricated with 15 sccm N<sub>2</sub> showed remarkable performance as a highly sensitive temperature sensor in the 10 K–150 K range. Most notably, it exhibited an extraordinarily low TCR of −1.24 ppm/K at 260 K and −0.034 ppm/K at 320 K. This is one of the lowest TCR values ever reported, indicating remarkable stability at higher temperatures and is, hence, a good option for applications requiring ultra-stable resistors. Additionally, the bandgap energy and surface roughness of TaN thin films increased from 3.756  eV to 3.847  eV and from 0.297 nm to 0.755 nm, respectively, as the nitrogen concentration increased.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118605"},"PeriodicalIF":3.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588912","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
SrTiO3 nanocubes synthesized by polymeric surfactant-aided sol–gel method for sustainable photocatalytic remediation of tetracycline antibiotic in water 聚合物表面活性剂辅助溶胶-凝胶法制备SrTiO3纳米立方用于水中四环素类抗生素的可持续光催化修复
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-10 DOI: 10.1016/j.mseb.2025.118597
Mona A. Alenezi , Maha Alhaddad , Naif S Aljohani , Reda M Mohamed
{"title":"SrTiO3 nanocubes synthesized by polymeric surfactant-aided sol–gel method for sustainable photocatalytic remediation of tetracycline antibiotic in water","authors":"Mona A. Alenezi ,&nbsp;Maha Alhaddad ,&nbsp;Naif S Aljohani ,&nbsp;Reda M Mohamed","doi":"10.1016/j.mseb.2025.118597","DOIUrl":"10.1016/j.mseb.2025.118597","url":null,"abstract":"<div><div>Strontium titanate (SrTiO<sub>3</sub>) cubic nanostructures have been grown by the sol–gel method aided with Pluronic® F-127 surfactant by the variation of its molar ratio to its precursors. Various descriptive tools evaluated the synthesized materials, revealing the significant influence of altering the F-127 concentration on the development of texture and photoactivity related to the absorption of light and separation of charges. The synthesized nanocube structures demonstrated adjustable size ranges from 50 to 250 nm, and varying oxygen vacancy content, based on the used F-127 portion. The synthesized SrTiO<sub>3</sub> nanocubes were employed for the photocatalytic oxidation of 45 µM tetracycline (TCY) antibiotic in aqueous solution under UV light. The SrTiO<sub>3</sub> synthesized with 0.015 % F-127 content exhibited the narrowest band gap of 3.21 eV and the uppermost photocatalytic activity. Notably, the photooxidation efficiency of this sample was the highest (80 %) among the SrTiO<sub>3</sub> samples prepared with varying F-127 content. Additionally, a 1.5 gL<sup>−1</sup> dose of SrTiO3 synthesized with 0.015 % F-127 content achieved complete photooxidation of TCY, with an initial reaction rate of 1.026 µmol min<sup>−1</sup> and maintained 96 % of its original oxidation efficacy after the fifth cycle.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118597"},"PeriodicalIF":3.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589003","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
Modulation of binding energy and polarizability in GaAs four-quantum-dot systems under electric fields 电场作用下砷化镓四量子点系统结合能和极化率的调制
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-10 DOI: 10.1016/j.mseb.2025.118588
R. Arraoui , M. Jaouane , A. Fakkahi , A. Ed-Dahmouny , K. El-Bakkari , H. Azmi , A. Sali , H.El Ghazi
{"title":"Modulation of binding energy and polarizability in GaAs four-quantum-dot systems under electric fields","authors":"R. Arraoui ,&nbsp;M. Jaouane ,&nbsp;A. Fakkahi ,&nbsp;A. Ed-Dahmouny ,&nbsp;K. El-Bakkari ,&nbsp;H. Azmi ,&nbsp;A. Sali ,&nbsp;H.El Ghazi","doi":"10.1016/j.mseb.2025.118588","DOIUrl":"10.1016/j.mseb.2025.118588","url":null,"abstract":"<div><div>The research explores the impact of an external electric field (E-field), the position of a shallow donor impurity, and key structural variables (including dot width and barrier width) on the binding energy (B.E.) and polarizability of a nanosystem. The system consists of an electron and a shallow donor impurity contained within four <span><math><mrow><mi>G</mi><mi>a</mi><mi>A</mi><mi>s</mi></mrow></math></span> quantum dots (4 GaAs QDs), which are infused in an <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mi>x</mi></msub><msub><mrow><mi>G</mi><mi>a</mi></mrow><mrow><mn>1</mn><mo>-</mo><mi>x</mi></mrow></msub><mi>A</mi><mi>s</mi></mrow></math></span> medium. To model these effects, the effective mass framework and finite element framework (FEF) are employed. The findings demonstrate that the electric field perturbs the symmetry of the binding energy, resulting in position-dependent variations that reflect the interplay between quantum confinement and field-induced electron delocalisation. In addition, variations in dot and barrier widths, combined with the impurity position, induce complex modifications in the binding energy. Strong confinement results in a nearly constant polarisability, whereas weak confinement produces a non-monotonic response. Furthermore, changes in barrier width and impurity position significantly affect the polarizability, highlighting the interaction between quantum confinement and field-induced charge redistribution.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118588"},"PeriodicalIF":3.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588909","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
Augmenting the filtered spectrum and current matching analysis of synergistic Dion-Jacobson 2D-3D Perovskite-CIGS tandem solar Cell: Achieving 32.56% efficiency 增强协同Dion-Jacobson 2D-3D钙钛矿- cigs串联太阳能电池的滤波光谱和电流匹配分析:达到32.56%的效率
IF 3.9 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-07-10 DOI: 10.1016/j.mseb.2025.118599
Gauri Pathak , Yashwant Kumar Singh , D.K. Dwivedi , Pooja Lohia , Rahul Pandey , Upendra Kulshrestha , Manish Kumar
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