Current Applied Physics最新文献

{"title":"Luminescent properties of terbium doped NaKLaNbO5 phosphors for green light emitting applications","authors":"T. Krishnapriya ,&nbsp;Adon Jose ,&nbsp;Arya Gopinath ,&nbsp;Cyriac Joseph ,&nbsp;P.R. Biju","doi":"10.1016/j.cap.2025.12.011","DOIUrl":"10.1016/j.cap.2025.12.011","url":null,"abstract":"<div><div>A series of novel green light emitting NaKLa_(1-x)NbO₅: x Tb³⁺ (x = 0.00–0.10) phosphors with higher activator critical concentration were synthesized by solid state reaction method and its structural, morphological and luminescence properties have been investigated. Under 287 nm excitation, the titled phosphors exhibited a strong green emission. The addition of the Tb³⁺ concentration greatly improved the photoluminescent properties of the present phosphors without undergoing any quenching till the maximum concentration in the series (x = 0.10). The varying Tb³⁺concentrations did not have much influence on the CIE coordinates of the NaKLaNbO₅ phosphors. This monotonous increase in intensity without much alterations in color properties is a desirable character for non-color tunable applications. The NaKLa_(1-x)NbO₅: x Tb³⁺ phosphors with strong green emission are expected to have wide applications in white light LEDs and non-tunable displays to compensate the green gap in the field of luminescent materials.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 62-67"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145882054","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":"Analysis of temperature dependent characteristics of photodetector based on feedback field effect transistor","authors":"Dahee Jin ,&nbsp;Jeongmin Koo ,&nbsp;Yonghwan Kim ,&nbsp;Woojoo Lee ,&nbsp;Il Hwan Cho","doi":"10.1016/j.cap.2025.12.014","DOIUrl":"10.1016/j.cap.2025.12.014","url":null,"abstract":"<div><div>Photodetectors (PDs) with high thermal stability are crucial for applications in extreme environments. This study analyzes the temperature-dependent characteristics of a Feedback Field-Effect Transistor (FBFET)-based photodetector within a temperature range of 300 K–450 K using TCAD simulations. The results show that the proposed PD maintains a low dark current and stable illumination current, ensuring excellent thermal stability. While responsivity increases due to thermally assisted tunneling, sensitivity declines with rising temperature. Structural optimizations, such as adjusting the light incident region and body thickness, further enhance performance. These findings provide valuable insights for the development of next-generation high-temperature PDs.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 68-74"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145882053","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":"Effect of LSPR, temperature and electric field on reduction of CO2 in H2O vapor using photocatalytic TiO2-nanowires with Ag nanoparticles extruded from Ag-Nb-N-O film","authors":"Larisa Sorokina ,&nbsp;Andrey Tarasov ,&nbsp;Daria Dronova ,&nbsp;Alexey Trifonov ,&nbsp;Sergey Itskov ,&nbsp;Aleksey Tregubov ,&nbsp;Ekaterina Zhurina ,&nbsp;Hanna Bandarenka ,&nbsp;Sergey Dubkov ,&nbsp;Dmitry Kozlov ,&nbsp;Dmitry Gromov","doi":"10.1016/j.cap.2026.01.001","DOIUrl":"10.1016/j.cap.2026.01.001","url":null,"abstract":"<div><div>This paper reports on the formation and study of Ag-Nb-N-O/TiO₂ nanowires (NWs) for photocatalytic reduction of CO₂. Firstly, the Ag-Nb-N-O thin film was grown by simultaneous magnetron sputtering of Ag and Nb targets in an atmosphere of Ar and N₂. Subsequently, the Ag-Nb-N-O thin film was coated with TiO₂ NWs, which were presynthesized by a hydrothermal method and then annealed at 500 °C. Before photocatalytic tests, the Ag-Nb-N-O/TiO₂ NW samples were subjected to heat treatment at 350 °C. A morphology of the fresh and 350 °C-annealed Ag-Nb-N-O/TiO₂ NWs was comprehensively studied by SEM, TEM, EDXS, and XRD. Heating was found to facilitate the extrusion of Ag particles from the bulk of the Ag-Nb-N-O film to its surface. In addition, the heat treatment led to partial evaporation of silver and its further redeposition on the surface of TiO₂ NWs in the form of Ag nanoparticles. The Ag-Nb-N-O/TiO₂ NWs subjected to the 350 °C heating possessed a remarkable photocatalytic activity in the synthesis of methanol from CO₂, which was 3 times over that of the pure TiO₂ NWs. This is associated with the contribution of localized surface plasmon resonance of Ag particles to generation of the charge carriers. Moreover, we demonstrate that LSPR-induced heating of Ag nanoparticles, confirmed by IR imaging, plays a crucial role in charge carrier separation. The thermoelectromotive force generated by the temperature gradient facilitates electron transfer from TiO₂ to Ag, thereby improving CO₂ reduction efficiency. Additionally, we revealed that an external electric field enables an improvement of the Ag-Nb-N-O/TiO₂ NW photocatalytic activity providing an additional increase in the methanol yield by 60 %.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 119-129"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973640","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":"Red-emissive perovskite quantum dot-induced monochromatization for broadband photodetection in two-dimensional SnSe","authors":"Garam Bae ,&nbsp;Dohyung Lee ,&nbsp;Wooseok Song","doi":"10.1016/j.cap.2025.12.016","DOIUrl":"10.1016/j.cap.2025.12.016","url":null,"abstract":"<div><div>Broadband photodetection of two-dimensional (2D) semiconductors is often hampered by their narrow absorption bandwidth and limited sensitivity to short-wavelength photons. In this work, we propose an effective spectral engineering strategy by integrating red-emissive CsPbBrI₂ perovskite quantum dots (PQDs) with SnSe layer-based photodetectors. The PQD film functions as a photon down-conversion medium, absorbing ultraviolet (UV) and blue photons and re-emits them at ∼625 nm, near the absorption edge of SnSe. This photon down-conversion significantly enhances the photocurrent response of the hybrid device across the ultraviolet–visible–near-infrared spectrum. Time-resolved photocurrent measurements reveal up to an order-of-magnitude improvement in photoresponse compared to pristine SnSe, particularly under UV excitation. Spectroscopic and morphological analyses confirm the structural integrity and optical activity of the CsPbBrI₂ PQD layer, as well as its conformal coverage on the SnSe surface. Furthermore, optimization of PQD coating thickness indicates that a single spin-coating cycle yields the best performance by balancing PL efficiency and photon penetration. The hybrid photodetectors also exhibit stable ON/OFF switching characteristics across all excitation wavelengths. These results establish a versatile and non-invasive approach for extending the spectral sensitivity of 2D semiconductors using photonic down-conversion layers, offering promising opportunities for next-generation broadband optoelectronic devices.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 31-37"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145882055","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":"Preparation and characterization of ferromagnetic Cu doped ZnO","authors":"Mahuya Chakrabarti ,&nbsp;Apurba Kumar Nayek ,&nbsp;Bidyut Haldar ,&nbsp;Sudipta Moshat ,&nbsp;Dirtha Sanyal","doi":"10.1016/j.cap.2025.12.018","DOIUrl":"10.1016/j.cap.2025.12.018","url":null,"abstract":"<div><div>The ferromagnetism in Cu doped Zinc oxide (ZnO) has been investigated and the possible origin of magnetism in the system has been discussed. The Cu doped ZnO has been successfully prepared by solid state reaction method. Magnetization measurement of these Cu doped ZnO samples show ferromagnetic behavior at room temperature. Room temperature Photoluminescence spectroscopy measurements shows defect related blue emission peak together with the UV emission. Employing positron annihilation spectroscopy all the Cu doped and undoped ZnO samples has been characterized. Positron annihilation lifetime results suggest no significant increase of cation defect in Cu doped ZnO.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 75-80"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922447","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":"Enhanced piezoelectric power generation of flexible poly(vinylidenefluoride-co-trifluoroethylene) thin films deposited on Pt/mica substrates","authors":"Eunmi Lee ,&nbsp;Jong Yeog Son","doi":"10.1016/j.cap.2026.01.003","DOIUrl":"10.1016/j.cap.2026.01.003","url":null,"abstract":"<div><div>Flexible ferroelectric and piezoelectric thin films are promising for next-generation wearable and flexible electronics. Here, we investigated the enhanced properties of poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) thin films by improving the crystallinity of (111)-oriented Pt bottom electrodes on mica substrates. The crystallinity of Pt was enhanced by lowering the deposition rate, which promoted the β-phase formation in PVDF-TrFE films. The flexible films exhibited a remanent polarization of about 9.2 μC/cm² (2P_r ≈ 18.4 μC/cm²) and maintained stable polarization even at a bending radius of 2 mm. Furthermore, piezoelectric output voltages generated under periodic deformation were significantly improved with higher crystallinity of the Pt electrode. These results highlight that highly crystalline Pt bottom electrodes effectively enhance the ferroelectric and piezoelectric performance of PVDF-TrFE thin films, demonstrating their strong potential for wearable and flexible electronic applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 108-112"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922451","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":"Plasma-assisted engineering of structural and dielectric characteristics in oxide nanoparticle-doped liquid crystal composites","authors":"Mahsa Khadem Sadigh ,&nbsp;Maryam Beigmohammadi ,&nbsp;Aylar Daneshfar ,&nbsp;Amid Ranjkesh","doi":"10.1016/j.cap.2026.01.002","DOIUrl":"10.1016/j.cap.2026.01.002","url":null,"abstract":"<div><div>This study investigates how oxygen plasma treatment alters the properties of SnO₂ and Mn₂O₃ nanoparticles and, in turn, influences the dielectric behavior of nematic liquid crystals. The findings show that the duration of plasma exposure plays a significant role in modifying particle size, morphology, and surface chemistry. XRD analysis confirm that the tetragonal structure of SnO₂ and cubic structure of Mn₂O₃ remain intact, through both exhibit a slight decrease in crystallite size following treatment. SEM analysis reveals that plasma processing smoothens and compacts the surface of SnO₂, whereas Mn₂O₃ undergoes partial surface etching and localized re-agglomeration, consistent with its higher reactivity. FTIR spectra indicate strengthened oxygen-related features and enhanced surface functionalization, which facilitate more pronounced interfacial polarization. Consequently, the liquid crystal doped with Mn₂O₃ nanoparticles reaches its maximum dielectric anisotropy after 14 min of plasma exposure. Overall, controlled plasma treatment can effectively tailor nanoparticle-liquid crystal interactions and enhance dielectric performance.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 154-162"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023371","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":"Variation of critical current density with superfluid phase stiffness in composite system of YBCO and Sn-nanoparticles","authors":"Doyel Rakshit,&nbsp;Ajay Kumar Ghosh","doi":"10.1016/j.cap.2025.12.017","DOIUrl":"10.1016/j.cap.2025.12.017","url":null,"abstract":"<div><div>We have investigated transport properties of polycrystalline YBa₂Cu₃O<span><math><msub><mspace></mspace><mrow><mn>7</mn><mo>−</mo><mi>δ</mi></mrow></msub></math></span> (YBCO) superconductors containing tin (Sn) nanoparticles in the intergranular region. The normal state resistivity of YBCO with 2.0 wt.% of Sn at 300 K increases 2.35 times in comparison to that of the pure YBCO. The addition of Sn nanoparticles at several weight percentages has significantly influenced the transport critical current density (<span><math><msub><mi>J</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub></math></span>) in YBCO. Using the Ambegaokar-Halperin-Nelson-Siggia (AHNS) theory, we have extracted superfluid phase stiffness (<span><math><msub><mi>J</mi><mrow><mrow><mtext>s</mtext></mrow></mrow></msub></math></span>) as a function of temperature (<span><math><mi>T</mi></math></span>). The variation of <span><math><msub><mi>J</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub><mo>(</mo><mi>T</mi><mo>)</mo></math></span> in relation to <span><math><msub><mi>J</mi><mrow><mrow><mtext>s</mtext></mrow></mrow></msub><mo>(</mo><mi>T</mi><mo>)</mo></math></span> has also been examined within the vicinity of the phase transition region. Additionally, the behavior of <span><math><msub><mi>J</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub><mo>(</mo><mi>T</mi><mo>)</mo></math></span> has been discussed by considering the <span><math><mi>δ</mi><msub><mi>T</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub></math></span> and <span><math><mi>δ</mi><mi>l</mi></math></span> flux pinning mechanisms.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 113-118"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922352","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":"Plasmonic dual-silver decorated dielectric nanoantenna arrays for enhanced surface-enhanced Raman scattering (SERS) sensors","authors":"Ravindra Pratap Singh ,&nbsp;N. Nagabhooshanam ,&nbsp;Yogendra Thakur ,&nbsp;Deepak Nathiya ,&nbsp;M.D Anto Praveena ,&nbsp;U.L. Nagendra Kumar ,&nbsp;A. Rajaram","doi":"10.1016/j.cap.2025.12.013","DOIUrl":"10.1016/j.cap.2025.12.013","url":null,"abstract":"<div><div>Surface-Enhanced Raman Scattering (SERS) is a powerful technique for ultrasensitive molecular detection; however, achieving both high sensitivity and reproducibility remains difficult with conventional plasmonic substrates. This work presents a novel plasmonic dual-silver–decorated dielectric nanoantenna array designed to overcome these limitations. Dielectric nanoantennas were first lithographically fabricated, followed by deposition of a thin silver base layer and a second layer of silver nanoparticles. This dual-silver architecture enables multiscale plasmonic coupling and generates dense electromagnetic hotspots, significantly enhancing local field intensities. Structural and optical analyses using SEM and UV–Vis spectroscopy confirmed uniform silver distribution and strong plasmonic activity. Using Rhodamine 6G as a probe, Raman measurements demonstrated excellent signal uniformity and enhancement factors exceeding 10⁷. Finite-Difference Time-Domain simulations further verified strong near-field enhancement at the metal–dielectric interface. Owing to its high sensitivity, stability, and reproducibility, the proposed hybrid nanoantenna substrate is well suited for chemical, environmental, and biological sensing applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 136-144"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023372","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":"Effect of synthesis route on the structural and electrical properties of Co substituted Ni-Mn oxide based NTC thermistors","authors":"V.K. Haripriya,&nbsp;Aneesh George,&nbsp;K.A. Malini","doi":"10.1016/j.cap.2025.12.021","DOIUrl":"10.1016/j.cap.2025.12.021","url":null,"abstract":"<div><div>Nickel manganite (NiMn₂O₄) is a versatile mixed metal oxide widely used as an NTC thermistor in industrial and domestic applications requiring precise temperature sensing. Nickel manganite with inverse spinel (AB₂O₄) structure can be synthesized using methods such as solid-state reaction, sol-gel, hydrothermal, and co-precipitation techniques. Adding elements like Cu, Co, Fe, Zn, or Mg in varying amounts can further modify its electrical properties. This work examines cobalt substituted Ni-Mn oxides of composition Ni_1-xCo_xMn₂O₄ (0 ≤ x ≤ 0.6) synthesized via solid-state reaction and sol-gel auto-combustion methods, comparing their structural and electrical properties. XRD and FTIR confirmed nanosized samples with a cubic spinel structure for both methods. Electrical studies demonstrated NTC behaviour, with resistivity varying based on cobalt content. Dielectric studies revealed a decrease in dielectric constant with frequency and an increase with temperature. The findings indicate the significant influence of synthesis methods on the structural and electrical characteristics of the materials.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 88-96"},"PeriodicalIF":3.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922449","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}