International Journal of Modern Physics B最新文献_第2页

Robust design of a two-stage composite sliding mode controller for enhanced performance in large-scale systems 提高大规模系统性能的两级复合滑模控制器的鲁棒设计

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-22 DOI: 10.1142/s0217979225400168

Hnnie Williams, B. B. Musmade, Jitendrakumar Namdeo Shinde

引用次数: 0

Investigation for AGZO RRAM using the RF Co-sputtering method 使用射频共溅射方法研究 AGZO RRAM

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-22 DOI: 10.1142/s0217979225400211

Sheng-Po Chang, Yun-Chien Tsai, Jone-Fang Chen

{"title":"Investigation for AGZO RRAM using the RF Co-sputtering method","authors":"Sheng-Po Chang, Yun-Chien Tsai, Jone-Fang Chen","doi":"10.1142/s0217979225400211","DOIUrl":"https://doi.org/10.1142/s0217979225400211","url":null,"abstract":"Recently, the Internet of Things (IOT) has rapidly developed, leading to the development of many smart devices. Moreover, artificial intelligence (AI) and 5G communication are successful, and the demand for high-performance memory is increasing. The emerging nonvolatile RRAM has many advantages, such as low power consumption, fast operation speed, simple structure and excellent scalability, compared with traditional memories; this is promising for complex computing and mass storage. Zinc oxide (ZnO) is a promising candidate for transparent conducting oxide (TCO) applications because of its abundance, high conductivity, low toxicity, and cost-effectiveness. It is currently used in various optoelectronic components including thin-film transistors (TFTs) and photodetectors. Notably, TCO has been increasingly used in the switching layers of random resistive access memory systems. In this paper, we intend to combine AGO with a large energy gap and ZnO with a high conductivity to prepare AGZO as a switching layer for RRAM by co-sputtering. By adjusting the oxygen flow ratio and power of co-sputtering, the AGZO RRAM exhibited high performance with more than 1400 switching cycles, 102–103 on/off ratio, and low operation voltage, and high- and low-resistance states could be maintained for more than 10,000[Formula: see text]s.","PeriodicalId":14108,"journal":{"name":"International Journal of Modern Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141110840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zinc oxide doped with graphene quantum dots as improved electron transport layers for planner perovskite solar cells 掺杂石墨烯量子点的氧化锌作为改进型电子传输层用于平面透辉石太阳能电池

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-21 DOI: 10.1142/s0217979225500584

Ankita Chauhan, Anjan Kumar, V. Deolia

{"title":"Zinc oxide doped with graphene quantum dots as improved electron transport layers for planner perovskite solar cells","authors":"Ankita Chauhan, Anjan Kumar, V. Deolia","doi":"10.1142/s0217979225500584","DOIUrl":"https://doi.org/10.1142/s0217979225500584","url":null,"abstract":"Zinc oxide (ZnO), a material with excellent electron mobility and a low-temperature requirement for production, is a promising option for use as an electron transport layer in perovskite solar cells (PSCs). However, it does have the drawback of having a low open-circuit voltage ([Formula: see text]). Herein, to increase the [Formula: see text] parameter of ZnO-based PSCs, graphene quantum dots (GQDs) are incorporated into the ZnO precursor and used as desirable ETL for PSCs. The presence of GQDs in ZnO ETL facilitated photo-electrons at the ETL/perovskite interface by reducing charge transfer resistance in this interface. Compared to the net ZnO-based PSCs, solar cells using GQD-doped ZnO as ETL have better stability, comparable [Formula: see text], higher [Formula: see text], and FF. The best GQD-doped-ZnO ETL-based PSCs recorded the highest power conversion efficiency of 20.23% with [Formula: see text] of 1.130[Formula: see text]V. Meanwhile, the boosted PCE of FAPbI3-based PSCs is achieved due to the improved perovskite crystal quality, the effective defect passivation effect of GQDs at ZnO/FAPbI3 interface, and the increased electrical conductivity of ZnO ETL. In addition, the GQD-doped ETL devices showed higher ambient air stability than the devices with net ZnO ETLs.","PeriodicalId":14108,"journal":{"name":"International Journal of Modern Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141117247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of the Stark/Zeeman-hyperfine-rotational spectra of 79BrF molecule within its vibronic ground state 模拟 79BrF 分子在其振动基态下的斯塔克/泽曼-超频旋转光谱

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-21 DOI: 10.1142/s0217979225500614

Ouyang Qi, Run Chen, Xu-Ping Shao, Yun-Xia Huang, Xiao-Hua Yang

引用次数: 0

Fabrication, surface characterization and effect of oxygen irradiation on polymeric nanocomposite films 聚合物纳米复合薄膜的制备、表面表征及氧气辐照的影响

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-21 DOI: 10.1142/s0217979225500572

H. Al-Yousef, B. M. Alotaibi, A. Atta, E. Abdeltwab, M. M. Abdelhamied

{"title":"Fabrication, surface characterization and effect of oxygen irradiation on polymeric nanocomposite films","authors":"H. Al-Yousef, B. M. Alotaibi, A. Atta, E. Abdeltwab, M. M. Abdelhamied","doi":"10.1142/s0217979225500572","DOIUrl":"https://doi.org/10.1142/s0217979225500572","url":null,"abstract":"This study addressed the preparation of nanocomposites consisting of polyvinyl alcohol (PVA) and titanium oxide (TiO2) for utilization in optoelectronics technologies. PVA/10%TiO2 nanocomposite samples with a mean thickness of 0.1[Formula: see text]mm were created using the solution casting method. The PVA/TiO2 films are irradiated with oxygen fluences of [Formula: see text], [Formula: see text] and [Formula: see text] ions/cm2. The X-ray diffraction (XRD) and FTIR methodologies were employed to investigate the impact of ion bombardment on the structural characteristics and functional groups of PVA/TiO2 substrates. Diffraction peaks are 20.1° for PVA and 25.4° for TiO2, indicating the successful PVA/TiO2 nanocomposite construction. The absorbance (A) of unirradiated and irradiated samples was measured using UV–Vis spectroscopy within a wavelength range of 200–1100[Formula: see text]nm. Band gaps ([Formula: see text]) were calculated using Tauc’s formula for PVA/TiO2 films, exhibiting a decrease from 4.56[Formula: see text]eV for unirradiated PVA/TiO2 film to 4.16, 3.95 and 3.88[Formula: see text]eV at ion fluences of [Formula: see text], [Formula: see text] and [Formula: see text] ions/cm2, respectively. Furthermore, the Ubrach tail has a rise of 1.23[Formula: see text]eV for unirradiated PVA/TiO2 to 1.28[Formula: see text]eV, 1.4[Formula: see text]eV and 1.77[Formula: see text]eV for irradiated films with ion fluences of [Formula: see text], [Formula: see text] and [Formula: see text] ions/cm2, respectively. Additionally, following ion irradiation, the PVA/TiO2 absorption edge [Formula: see text], which was 3.56[Formula: see text]eV, decreased to 3.48, 3.37 and 3.23[Formula: see text]eV, with increasing ion beam fluences. This study demonstrated that the optical behaviors of the PVA/TiO2 films were altered under bombardment, suggesting their potential applicability in optical devices.","PeriodicalId":14108,"journal":{"name":"International Journal of Modern Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141115046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First-principles investigation of the thermal properties of XO (X=Be, Mg and Sr) nanosheet XO（X=Be、Mg 和 Sr）纳米片热学特性的第一原理研究

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-21 DOI: 10.1142/s0217979225500675

B. Abdullah, Y. H. Azeez, N. R. Abdullah

{"title":"First-principles investigation of the thermal properties of XO (X=Be, Mg and Sr) nanosheet","authors":"B. Abdullah, Y. H. Azeez, N. R. Abdullah","doi":"10.1142/s0217979225500675","DOIUrl":"https://doi.org/10.1142/s0217979225500675","url":null,"abstract":"The electronic structures and thermal properties of hexagonal XO ([Formula: see text], Mg and Sr) nanosheets are studied within the density functional theory. The thermal properties are computed using the specified structural parameters of the electronic properties. Thermal properties including entropy, enthalpy, free energy and heat capacity for XO nanosheets are reported. It is found that BeO is an insulator, whereas MgO and SrO are semiconductors based on the energy gap value within GGA and HSE06. The electronegativity and bonding nature of XO nanosheets differ, resulting in considerable variations in thermodynamic parameters that follow a similar pattern as a function of temperature. Enthalpy and entropy increase with temperature whereas free energy falls, owing to a change in the binary oxide internal energy of the system and the electron density distribution. Thermal energy absorbed by the lattices grows with increasing temperature to the point at which all of their modes are activated and the systems start to display unharmonicity deviating from a linear dependence. Variable parameter ranges for XO nanosheets are useful in the development of thermoelectric nanodevices.","PeriodicalId":14108,"journal":{"name":"International Journal of Modern Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141116135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and luminescence study of the rare earth ion (Nd3+) doped Sr3Bi(PO4)3 phosphor 掺杂稀土离子 (Nd3+) 的 Sr3Bi(PO4)3 荧光粉的合成与发光研究

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-21 DOI: 10.1142/s0217979225500651

Supriya Kshetrapal, N. Ugemuge, R. Nafdey, S. V. Moharil

引用次数: 0

Synthesis and characterization of ZnO tetrapod-like nanorods without catalyst by wet thermal evaporation and applied on dye-sensitized solar cells 通过湿热蒸发法合成无催化剂的 ZnO 四足类纳米棒并将其应用于染料敏化太阳能电池

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-21 DOI: 10.1142/s0217979225500602

H. Abdulgafour, S. Abdalhadi, Madeeha H. Mahmood

{"title":"Synthesis and characterization of ZnO tetrapod-like nanorods without catalyst by wet thermal evaporation and applied on dye-sensitized solar cells","authors":"H. Abdulgafour, S. Abdalhadi, Madeeha H. Mahmood","doi":"10.1142/s0217979225500602","DOIUrl":"https://doi.org/10.1142/s0217979225500602","url":null,"abstract":"Dye-sensitized solar cells (DSSCs) continue to attract as one of the most important renewable energy technologies due to their simple production, environmentally friendly, and lower-cost fabrication process compared to the most common types of solar cells. Zinc oxide (ZnO) nanostructures have motivated researchers to fabricate DSSCs as photo-anodes due to their unique properties, such as different types of structures, appropriate optical properties, proper energy bandgap, and high electron transfer characteristics. This article reports the simple preparation of ZnO tetrapod-like nanorods using the wet thermal evaporation method on porous silicon substrate PS/Si and applied as a photoanode on DSSCs. ZnO nanostructures were characterized by using grazing-angle X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) measurements. A significant difference in the performance of DSSCs has been investigated by using a standard dye di-tetrabutylammonium cis–bis(isothiocyanate)bis(2,2[Formula: see text]-bipyridyl-4,4[Formula: see text]-dicarboxylato) ruthenium (II) (N719) reloaded on ZnO tetrapod-like nanorods ([Formula: see text], [Formula: see text], [Formula: see text]%, and [Formula: see text]%) being more efficient than the ZnO spherical nanoparticles as a reference solar cell ([Formula: see text], [Formula: see text], [Formula: see text]%, and [Formula: see text]%).","PeriodicalId":14108,"journal":{"name":"International Journal of Modern Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141117886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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 Mn and Ru substitutions on the electrical properties and AC susceptibility of Tl(BaSr)CaCu2O7 superconductor 锰和钌取代对 Tl(BaSr)CaCu2O7 超导电学特性和交流电感的影响

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-21 DOI: 10.1142/s0217979225500511

K. Muhammad-Aizat, M. Jumali, N. A. Jaafar, R. Abd-Shukor

{"title":"Effects of Mn and Ru substitutions on the electrical properties and AC susceptibility of Tl(BaSr)CaCu2O7 superconductor","authors":"K. Muhammad-Aizat, M. Jumali, N. A. Jaafar, R. Abd-Shukor","doi":"10.1142/s0217979225500511","DOIUrl":"https://doi.org/10.1142/s0217979225500511","url":null,"abstract":"In this paper, the effects of M = Mn and Ru substitutions at the Tl site of Tl[Formula: see text]Mx(BaSr)CaCu2O7 (Tl-1212) on the electrical properties and AC susceptibility were investigated. The X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) methods were used to examine the phase and microstructure, respectively. All samples showed diffraction patterns with Tl-1212 as the major phase and an increase in the Tl-1223 phase with increasing Mn and Ru substitutions. The microstructure showed partial melting and randomly oriented grains in all samples. The electrical resistance measurements showed metallic normal state behavior for all samples. The zero-resistance transition temperature [Formula: see text] was the highest for x = 0.4 where [Formula: see text] was 107[Formula: see text]K and 90[Formula: see text]K for Mn and Ru substitutions, respectively. The superconducting transition, [Formula: see text] obtained from AC susceptibility measurements increased with Mn and Ru substitutions up to x = 0.4. Using Bean’s model, the current density at the peak temperature of the imaginary part of the AC susceptibility, [Formula: see text]([Formula: see text] was determined to be between 16 and 22[Formula: see text]A[Formula: see text]⋅[Formula: see text]cm[Formula: see text] for Mn, and between 15 and 19[Formula: see text]A[Formula: see text]⋅[Formula: see text]cm[Formula: see text] for Ru-substituted samples. Mn substitution showed a higher transition temperature compared with Ru. This study showed that optimization of the average Cu valence was achieved with Mn and Ru substitutions for x = 0.4 at the Tl site. The ionic radii of the substituting and substituted elements are important factors in enhancing the transition temperature of Tl(BaSr)CaCu2O7 superconductor.","PeriodicalId":14108,"journal":{"name":"International Journal of Modern Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141117847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication and application of two-dimensional tungsten disulfide thin film 二维二硫化钨薄膜的制作与应用

IF 1.7 4区物理与天体物理

International Journal of Modern Physics B Pub Date : 2024-05-18 DOI: 10.1142/s0217979225400132

Chieh-Yu Kuan, Sheng-Po Chang, Guan-Yuan Liou, S. Chang, Shoou-Jinn Chang

{"title":"Fabrication and application of two-dimensional tungsten disulfide thin film","authors":"Chieh-Yu Kuan, Sheng-Po Chang, Guan-Yuan Liou, S. Chang, Shoou-Jinn Chang","doi":"10.1142/s0217979225400132","DOIUrl":"https://doi.org/10.1142/s0217979225400132","url":null,"abstract":"To form a tungsten disulfide film, a tungsten trioxide film is deposited first and then hydrogen sulfide is injected into the furnace tube to sulfide the tungsten trioxide film in a high-temperature environment. Due to the need to accurately control the thickness of tungsten trioxide, the power of the RF sputtering machine was reduced as much as possible in a stable condition in the experiment and the bias voltage during each process was monitored. In this experiment, a sapphire substrate and a silicon substrate with 200[Formula: see text]nm silicon dioxide are used. Then use optical instruments such as Raman optics, ellipsometers and high-resolution electron transmission microscopes, atomic force microscopes and other instruments for further measurement. The analysis results show that we have successfully made tungsten disulfide films of different thicknesses. Moreover, two-dimensional tungsten disulfide thin film has a response to light, gas and pH and related devices have been successfully fabricated in experiments. Among them, comparing the single-layer film and the double-layer film, the film quality of the double-layer film is better. The quality of the film grown on the sapphire substrate is also better than the quality of the film grown on the silicon dioxide substrate.","PeriodicalId":14108,"journal":{"name":"International Journal of Modern Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141125500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0