Current Applied Physics最新文献

{"title":"Evaluating physio-chemical and optoelectronic properties of CuInSn(S,Se)4 thin films and its photoelectrochemical cell application","authors":"Monika P. Joshi ,&nbsp;Popatrao N. Bhosale ,&nbsp;Sawanta S. Mali ,&nbsp;Chang Kook Hong","doi":"10.1016/j.cap.2025.04.004","DOIUrl":"10.1016/j.cap.2025.04.004","url":null,"abstract":"<div><div>In this work, CuInSn(S,Se)₄ (CITSSe) thin films were synthesized using a self-organized, facile arrested precipitation technique at room temperature. The variation in physio-chemical and optoelectronic properties of the thin films was systematically studied by probing the In³⁺ ion concentration. The synthesized CITSSe thin films exhibited significant improvements in optostructural and optoelectronic properties. Optical absorption studies confirmed a direct allowed transition with a band gap energy ranging from 1.40 to 1.54 eV. X-ray diffraction analysis verified the formation of a cubic crystal structure, while a peak shift from (220) to (511) with increasing In³⁺ ion concentration indicated successful incorporation of In³⁺ ions into the CITSSe matrix. A notable modification in surface morphology was observed, transitioning from nanocubes to nanocorals from sample I₀ to I₄. The elemental composition of the CITSSe thin films was confirmed through energy-dispersive X-ray spectroscopy. Furthermore, the nanocrystalline nature of the pentanary CITSSe thin films was validated using high-resolution transmission electron microscopy and selected area electron diffraction patterns. Photoelectrochemical and impedance characteristics were analyzed using a two-electrode cell configuration, where the highest photoelectrochemical efficiency of 0.61 % was achieved for the bare CITSSe thin film, exhibiting low charge transfer resistance.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 63-75"},"PeriodicalIF":2.4,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205755","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}

{"title":"Chemical wrapping for selective crystal formation using trapping light induction","authors":"Md Jahidul Islam,&nbsp;Md Hafizul Islam","doi":"10.1016/j.cap.2025.05.008","DOIUrl":"10.1016/j.cap.2025.05.008","url":null,"abstract":"<div><div>In this research, we demonstrated how different products emerge from the same precursor solution based on experimental conditions, particularly laser trapping and thermal heating. Using a precursor solution of MACl and PbI₂ in a DMSO/DMF solvent, we observed that laser trapping selectively induces MAPbCl₃ crystallization, yielding a material with a 2.94 eV bandgap and dark blue emission at 440 nm. In contrast, thermal heating of the same solution leads to the formation of MAPbI₃ thin films, characterized by bright red emission at 800 nm. This phenomenon is attributed to chemical wrapping effects, where solvent interactions and thermochemical conditions influence the final product. The ability to control perovskite formation through external stimuli like laser trapping expands the possibilities for fine-tuning material properties for targeted applications. This research not only deepens our understanding of crystallization dynamics in hybrid perovskites but also paves the way for innovative techniques in precision material synthesis.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 1-9"},"PeriodicalIF":2.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138728","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}

{"title":"Systematic analysis of the optical properties of ZnGa2Se4 single crystal","authors":"S.G. Asadullayeva ,&nbsp;Z.А. Jahangirli ,&nbsp;T.G. Naghiyev ,&nbsp;A.S. Abiyev","doi":"10.1016/j.cap.2025.05.007","DOIUrl":"10.1016/j.cap.2025.05.007","url":null,"abstract":"<div><div>The single crystals of ZnGa₂Se₄ compound were grown by gas transportation method. Photoluminescence (PL), photoconductivity (PC) properties was experimentally investigated. PL emission measurements in wide range of temperature (5–300 K) shown that the intensity of PL emission peak increase with decreasing the temperature. Simultaneously, blue shifts from 536 nm (2.31 eV) to 530 nm (2.34 eV) is observed at PL maxima by decreasing the temperature. Moreover, a strong PL peak with maximum at 1600 nm (0.77 eV) associated with an electronic transition from the acceptor level to the valence band is observed for the first time. The DFT calculations confirmed that PL excitation (PLE) peak at 2.83 eV can be associated with the electronic transition from the VBM to the CBM. Obtained experimental data and ab initio calculations for ZnGa₂Se₄ single crystals show good agreement. In general, experimental results were confirmed by ab-initio calculations.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"76 ","pages":"Pages 39-44"},"PeriodicalIF":2.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114819","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}

{"title":"Exploring phase transition dynamics in VO2 films: The role of substrate temperature","authors":"Akash Kumar Singh ,&nbsp;Deependra Kumar Singh ,&nbsp;H.K. Singh ,&nbsp;P.K. Siwach","doi":"10.1016/j.cap.2025.05.006","DOIUrl":"10.1016/j.cap.2025.05.006","url":null,"abstract":"<div><div>We investigated the effect of substrate temperature (T_S) on the phase transition characteristics of RF sputtered VO₂ films deposited on hexagonal ALO (0001) and cubic YSZ (001) substrates at ∼500°C–800 °C under Ar ambient only, in correlation with structure and morphology. High-Resolution X-ray Diffraction (HRXRD) and Raman spectroscopy confirmed the formation of the polycrystalline VO₂ (M1) phase with traces of secondary phases. Atomic Force Microscopy (AFM) and Field Emission Electron Microscopy (FESEM) reveal distinct surface roughness and grain morphology. Surface roughness increases significantly with large and non-uniform grains on c-plane Sapphire (ALO), whereas on Yttria-stabilized zirconia (YSZ), grains are small and uniform, having minimal surface roughness variation with increasing temperature. Above 600 °C, VO₂ films on both substrates exhibit reversible insulator-metal transitions (IMT/MIT) with ∼ (3–4) order resistivity change and pronounced thermal hysteresis close to ∼340K. The transition temperature (T_C) decreases with minima at ∼700 °C and again increases with temperature. Hysteresis width increases on ALO (∼1K–∼10K), whereas it decreases on YSZ (∼14K–∼7K) with increasing temperature. Films on both substrates above ∼600 °C exhibit room temperature average Temperature Coefficient of Resistance (TCR) of ∼ (1.61–3.18 %K⁻¹) and warming peak TCR of ∼(54.30–85.39 %K⁻¹ on ALO) and ∼(85.31–98.02 %K⁻¹ on YSZ). Distinct Activation Energy (E_A) dependence on substrate type and temperature has been observed in metallic and insulating phases. The observed phase transition characteristics of VO₂ films have been explained based on variation in distinct structure and morphology, which strongly depends on substrate type and temperature. These findings anticipate that substrate type and temperature play a decisive role in tailoring the structural and phase transition characteristics of VO₂ films for potential applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"76 ","pages":"Pages 45-57"},"PeriodicalIF":2.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155162","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}

{"title":"Enhancing photovoltaic performance of flower-like MoS2@ZnO core-shell nanowire photoanodes: Synergistic effects on solar energy conversion","authors":"Alagumalai Manimekalai ,&nbsp;Kuppu Sakthi Velu ,&nbsp;Sonaimuthu Mohandoss ,&nbsp;Seho Sun","doi":"10.1016/j.cap.2025.05.003","DOIUrl":"10.1016/j.cap.2025.05.003","url":null,"abstract":"<div><div>This study introduces an innovative flower-like molybdenum sulfide (MoS₂)-doped zinc oxide (ZnO) core-shell nanowire (NWs) designed to enhance the efficiency of dye-sensitized solar cells (DSSCs). The MoS2@ZnO NWs, created via a simple hydrothermal method, exhibit flower-like structures that improve light absorption and charge separation. Surface morphology analyses using FE-SEM, HR-TEM, and AFM confirm the core-shell architecture of the NWs, while XRD patterns reveal a hexagonal wurtzite phase with a distinct (003) plane. Electrical conductivity studies show that MoS2@ZnO NWs achieve a high conductivity of 3.65 × 10⁻³ S cm⁻¹. DSSCs were assembled with ZnO NPs and MoS2@ZnO NWs as photo-anodes and iodide/tri-iodide redox mediator solution, along with platinum (Pt) as the counter electrode (CE). The MoS₂@ZnO photo-anode attained a promising efficiency of 7.25 %, compared to 4.07 % from pristine ZnO NPs, highlighting the potential of core-shell NWs for advanced solar Cell applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"76 ","pages":"Pages 7-15"},"PeriodicalIF":2.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072251","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}

{"title":"Design and application of multi-absorption and highly sensitive monolayer graphene microstructure absorption devices located at terahertz frequencies","authors":"Xuncen Guo ,&nbsp;Chaojun Tang ,&nbsp;Zao Yi ,&nbsp;Shubo Cheng ,&nbsp;Junqiao Wang ,&nbsp;Boxun Li","doi":"10.1016/j.cap.2025.05.005","DOIUrl":"10.1016/j.cap.2025.05.005","url":null,"abstract":"<div><div>A graphene absorber has been designed in this message that is based on surface plasmon resonance (SPR). <u>The absorber exhibits four perfect absorption peaks within the target frequency band, featuring an innovative structure with excellent tunability and incident-angle insensitivity. The absorber features a triple-layered framework, with a gold (Au) substrate as the bottom layer, a silica (SiO</u>₂<u>) layer serving as the medium layer in the middle, and a graphene layer in a “#” symbol shape at the top.</u> The absorber has a simple structure and is easy to fabricate. <u>We then analyzed four variant that the absorber displays peak absorption efficiencies of 99.99 %, 99.32 %, 99.71 %, and 99.99 % when the frequencies are 7.5005 THz, 9.0920 THz, 10.1181 THz, and 11.3193 THz, respectively, all exceeding 99 %, demonstrating excellent absorption performance.</u> Additionally, we set up four electric field monitors to plot the electric field energy distribution maps for the four absorption peaks. <u>We then analyzed four variant structures derived from the original design, comparing the number of absorption peaks, absorption rates, and sensitivity, and concluded that the model structure proposed in this study is optimal.</u> After changing Fermi degree and time of relaxation, adjustment of the waves can be realized. The absorber demonstrates insensitivity to the angle as the incidence angle is changed from 0° to 60°. Furthermore, with the change of environmental refractive index, the maximum sensitivity among peaks can reach 3586 THz/RIU, showcasing high sensitivity. Finally, we calculated the figure of merit (FOM) and quality factor (Q) values for our model, which we compared with those of other absorbers, concluding that our absorber performs exceptionally well in terms of FOM and Q values. <u>Given these advantages, the absorber designed in this paper can be used in fields of sensors etc.</u></div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"76 ","pages":"Pages 16-25"},"PeriodicalIF":2.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072252","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}

{"title":"Structural and electronic properties of oxygen adsorption on TiN(001) surfaces: A first-principles study","authors":"Jinwoo Park,&nbsp;Junjin Jeon,&nbsp;Byung Deok Yu","doi":"10.1016/j.cap.2025.05.002","DOIUrl":"10.1016/j.cap.2025.05.002","url":null,"abstract":"<div><div>Using first-principles electronic structure calculations, we investigated the adsorption of oxygen atoms on TiN(001) surfaces at various oxygen coverages. The average adsorption energy calculations reveal that the <span><math><mi>p</mi><mo>(</mo><mn>1</mn><mo>×</mo><mn>2</mn><mo>)</mo></math></span> surface reconstruction featuring the fourfold coordination of titanium with two nitrogen and two oxygen atoms, previously suggested at an oxygen coverage of 0.50 monolayer, is energetically favorable under ultrahigh vacuum conditions. Utilizing <em>ab-initio</em> atomic thermodynamics, we also present a temperature-pressure phase diagram for surface stability under oxygen gas environmental conditions. The electronic properties of these surfaces are analyzed through projected electronic density of states and work function calculations. Furthermore, we provide simulated scanning tunneling microscopy images for each stable surface configuration to aid experimental observations.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"76 ","pages":"Pages 1-6"},"PeriodicalIF":2.4,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072250","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}

{"title":"Electron-beam-induced tunable reduction of graphene oxide on cellulose-based filter paper for flexible electromagnetic interference shielding","authors":"Jagdeep Singh ,&nbsp;Santosh K. Tiwari ,&nbsp;Soumik Bhowmik ,&nbsp;Karan Singh Hada ,&nbsp;A.S. Dhaliwal","doi":"10.1016/j.cap.2025.05.004","DOIUrl":"10.1016/j.cap.2025.05.004","url":null,"abstract":"<div><div>This study reports the electrochemical exfoliation synthesis of graphene oxide (GO) and the fabrication of free-standing GO films via vacuum filtration on cellulose filter paper (CFP). The films were subjected to electron beam irradiation at 10 keV for varying durations to achieve controlled reduction to reduced graphene oxide (rGO). Comprehensive characterization revealed significant changes in optical, thermal, chemical, morphological, mechanical, and dielectric properties, confirming successful reduction. The resulting rGO/CFP composite was used as electromagnetic interference (EMI) shielding in the 4–14 GHz range. Notably, the film was irradiated for 90 min, exhibiting a shielding effectiveness of 60.8 dB at 10 GHz with a thickness of 0.32 mm. This enhancement is attributed to improved conductivity, polarization relaxation, and dielectric losses caused by hopping carriers and lattice defects. E-beam irradiation presents a chemical-free, efficient method for producing flexible, high-performance rGO/CFP films for EMI shielding.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"75 ","pages":"Pages 50-62"},"PeriodicalIF":2.4,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947282","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}

{"title":"Exploring structural, optical, and magnetic analysis of dilute Co incorporated CdS thick films for spintronics","authors":"Aeshah Alasmari ,&nbsp;Salma Alshehri ,&nbsp;Abdulaziz Almalki ,&nbsp;Fahad Algarni ,&nbsp;Hosam M. Gomaa ,&nbsp;F.M. Aldosari ,&nbsp;Atef Ismail","doi":"10.1016/j.cap.2025.04.009","DOIUrl":"10.1016/j.cap.2025.04.009","url":null,"abstract":"<div><div>This study involves the preparation using a solid-state reaction method of six thin films of Cd_1-xCo_xS by varying the concentrations of cobalt and cadmium, where x = 0.0, 0.02, 0.04, 0.06, 0.08, and 0.1 At. %. The process included mixing Co₂S₃ and CdS powders in stoichiometric ratios, followed by mechanical ball milling, compacting into discs, and analyzing the films' properties. X-ray diffraction (XRD) confirmed the films' crystalline structure and energy-dispersive X-ray spectroscopy (EDX) verified the elemental composition, indicating the successful incorporation of Co into the CdS matrix. X-ray photoelectron spectroscopy (XPS) further detailed the chemical states within the films, showing that Co substitution influenced optical properties. The films' optical transmittance decreased with higher Co content, while reflectance and absorption increased, attributed to Co's impact on the electronic structure. The study also demonstrated a decrease in crystallite size and an increase in lattice strain with rising Co concentration, suggesting a reduction in crystallinity. Optical analyses revealed a decrease in the energy band gap and an increase in refractive index as Co content increased. The refractive index was modeled using the Cauchy equation, and the study noted a corresponding rise in static refractive index and dielectric constant, implying enhanced electromagnetic energy storage capability. Additionally, the magnetic properties showed room-temperature ferromagnetism (RT-FM) across all films, with significant values for saturation magnetization, coercivity, and retentivity.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"75 ","pages":"Pages 40-49"},"PeriodicalIF":2.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931571","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}

{"title":"Delta-function-potential junctions with quasiparticles occupying tilted bands with quadratic-in-momentum dispersion","authors":"Ipsita Mandal","doi":"10.1016/j.cap.2025.04.007","DOIUrl":"10.1016/j.cap.2025.04.007","url":null,"abstract":"<div><div>We continue our explorations of the transport characteristics in junction-configurations comprising semimetals with quadratic band-crossings, observed in the bandstructures of both two- and three-dimensional materials. Here, we consider short potential barriers/wells modelled by delta-functions. We also generalize our analysis by incorporating tilts in the dispersion. Due to the parabolic nature of the spectra, caused by quadratic-in-momentum dependence, there exist evanescent waves, which decay exponentially as we move away from the junction represented by the location of the delta-function potential. Investigating the possibility of the appearance of bound states, we find that their energies appear as pairs of <span><math><mo>±</mo><mo>|</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>b</mi></mrow></msub><mo>|</mo></math></span>, reflecting the presence of the imaginary-valued wavevectors at both positive and negative values of energies of the propagating quasiparticles.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"76 ","pages":"Pages 26-38"},"PeriodicalIF":2.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090515","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}