Journal of Luminescence最新文献

{"title":"Synthesis and photoluminescence properties of novel far-red emitting garnet phosphor Y3Ga3MgSi(1-y)GeyO12:Mn4+","authors":"","doi":"10.1016/j.jlumin.2024.120897","DOIUrl":"10.1016/j.jlumin.2024.120897","url":null,"abstract":"<div><p>In this paper, a novel far-red emitting garnet-structured phosphor, Y₃Ga₃MgSiO₁₂:Mn⁴⁺, was synthesized using the traditional solid-state reaction method. The prepared Y₃Ga₃MgSiO₁₂:Mn⁴⁺ phosphor exhibits a broad excitation band in the range of 250–600 nm and emits bright far-red light in the wavelength range of 630–710 nm, with a peak at 670 nm when excited at 354 nm. The optimal doping concentration of Mn⁴⁺ is approximately x = 0.006. Beyond this concentration, luminescence quenching occurs due to energy transfer between Mn⁴⁺ ions caused by dipole-dipole interactions. The effect of cation substitution on the photoluminescence properties of Y₃Ga₃MgSi_(1-y)Ge_yO₁₂:0.01Mn⁴⁺ phosphors was studied, revealing that the substitution of Ge⁴⁺ ions can systematically influence the luminescence of Mn⁴⁺. The Y₃Ga₃MgSiO₁₂:0.01Mn⁴⁺ phosphor exhibits excellent color purity, and its emission spectrum matches well with the absorption spectra of photosensitive pigments P_R and P_FR. The temperature-dependent emission spectra of Y₃Ga₃MgSi_(1-y)Ge_yO₁₂:0.01Mn⁴⁺ phosphors were studied, and the activation energy was calculated. The substitution of Ge⁴⁺ ions can improve the thermal stability of the samples. These outstanding photoluminescence properties suggest that Y₃Ga₃MgSiO₁₂:Mn⁴⁺ phosphor has application potential in pc-WLEDs and indoor plant cultivation pc-RLEDs. The findings of this work provide ideas for the design of high performance Mn⁴⁺ activated phosphors.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Photon avalanche effect and spectral control of single LiYF4:Yb3+/Pr3+microparticle","authors":"","doi":"10.1016/j.jlumin.2024.120893","DOIUrl":"10.1016/j.jlumin.2024.120893","url":null,"abstract":"<div><p>Photon avalanche is a special phenomenon of upconversion that the luminescence emission intensity exhibits a significant nonlinear response to the excitation power. Traditional photon avalanche is typically observed in bulk materials, which is not enough to meet requirements of modern techniques as it expect smaller in size and stronger in signal response. In this study, photon avalanche effect is obtained from single LiYF₄: Yb³⁺/Pr³⁺ microparticle. The emission intensity demonstrates a 16-order nonlinear coefficient with excitation intensity change under 835 nm laser excitation. By utilizing the plasmonic effect of noble metal nanoparticles, we successfully modulate the photon avalanche of the particle. Obvious reduction in the threshold of photon avalanche is detected when plasmonic gold nanorods are assembled to the surface of LiYF₄: Yb³⁺/Pr³⁺ microparticle.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Realization of narrow-band blue emission based on structurally engineering-designed Bi3+-doped phosphors","authors":"","doi":"10.1016/j.jlumin.2024.120896","DOIUrl":"10.1016/j.jlumin.2024.120896","url":null,"abstract":"<div><p>The exploration of efficient narrowband emission phosphors is crucial for white light-emitting diodes (WLEDs) in high-performance backlighting applications. Up to now, the discovery of narrow-band Bi³⁺-doped phosphors for emerging applications remains challenging because Bi³⁺ typically exhibits broadband emission properties. A novel narrow-band blue phosphor (Ca₄SnGe₃O₁₂:Bi³⁺) was successfully synthesized, benefiting from the highly symmetric crystal environment and tightly connected rigid structure of the garnet structure. The phosphor demonstrates broad excitation in the near-ultraviolet (n-UV) region and emits narrowband blue light at 442 nm (FWHM = 36 nm) with a color purity of 94.7 %. In this paper, the assignment of different luminescence centers and the use of Zr/Hf to partially replace Sn to enhance luminescence performance are studied. The reasons for the consequent changes in luminescence behavior are explained in detail. The use of narrowband commercial red K₂SiF₆:Mn⁴⁺, green β-Sialon:Eu²⁺, and synthetic blue luminescent materials as RGB emitters covered 81 % of the National Television System Committee (NTSC) color space, demonstrating great potential for liquid-crystal-display (LCD) backlight use.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Spectroscopic analysis of La2(WO4)3:Tb3+ phosphor and the delayed concentration quenching of 5D4 →7FJ emission","authors":"","doi":"10.1016/j.jlumin.2024.120895","DOIUrl":"10.1016/j.jlumin.2024.120895","url":null,"abstract":"<div><p>Trivalent terbium ion doped lanthanum tungstate (La_2-xTb_x(WO₄)₃; x = 0.6,1.0,1.4) and terbium tungstate (Tb₂(WO₄)₃) phosphors were successfully synthesized via optimized microwave-assisted co-precipitation technique. The phase purity and crystallinity of the prepared samples were confirmed using the powder XRD technique. The photoluminescence studies revealed a quenching-free emission up to 70 % of Tb³⁺ doping concentration, even though the emission intensity slightly decreases under host excitation since it becomes less relevant at higher doping concentrations. The experimental and calculated oscillator strengths were evaluated using absorption data and further used to quantify the Judd - Ofelt (JO) intensity parameters, which appeared in a trend of Ω₂&gt;Ω₄&gt;Ω₆ for all samples. As a theoretical approach to assure the excellency of the tungstate host, the radiative parameters were calculated from the emission data using the JO analysis technique. The dominance in the values of stimulated emission cross section and gain bandwidth corresponding to ⁵D₄→⁷F₅ transition of Tb³⁺ ion of lanthanum tungstate proclaims it as an excellent green phosphor. Hence, the less susceptibility of the tungstate host towards concentration quenching is confirmed in the present work.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Unraveling the role of crystal structural variations in modifying the luminescence properties of CMS: Eu3+ phosphor","authors":"","doi":"10.1016/j.jlumin.2024.120894","DOIUrl":"10.1016/j.jlumin.2024.120894","url":null,"abstract":"<div><p>Pristine and europium doped calcium magnesium silicate (CMS and CMS: Eu³⁺) phosphor having akermanite (Ca₂MgSi₂O₇), monticellite (CaMgSiO₄) and merwinite (Ca₃MgSi₂O₈) phases are synthesized via solid state reaction method. The modification of photoluminescence properties such as emission intensity, decay time and quantum yield (QY) due to the variation of the crystal structure, local site symmetry and coordination geometry of akermanite, monticellite and merwinite phases are studied. The merwinite phase is optimized at an annealing temperature of 900 °C, whereas monticellite phase is at 1100 °C. The agglomerated morphology changes to particle formation as the annealing temperature changes from 900 °C to 1100 °C. The lattice parameters and site preference of Eu³⁺ ions are determined using Density Functional Theory (DFT) calculations. The analysis of lattice expansion, formation enthalpy (<span><math><mrow><msub><mrow><mo>Δ</mo><mi>H</mi></mrow><mi>f</mi></msub></mrow></math></span>) and mixing energy (<span><math><mrow><msub><mrow><mo>Δ</mo><mi>H</mi></mrow><mi>m</mi></msub></mrow></math></span>) reveal the preference of Eu³⁺ occupation in the Ca²⁺ cationic site over Mg²⁺ for all three phases. The blueshift and redshift of Mg-O and Ca-O stretching in the Fourier Transform Infra-Red (FTIR) analysis agree with the DFT calculation. UV–visible spectra analyses reveal a modification in optical bandgap with Eu³⁺ addition. The highest intensity ⁵D₀→⁷F₂ induced electric dipole (ED), hypersensitive transition indicates the preference of Eu³⁺ ions in a non-inversion center for all the phases. This agrees with the higher <span><math><mrow><msub><mi>Ω</mi><mn>2</mn></msub></mrow></math></span> values from Judd-Ofelt (J-O) parameter calculations and local site symmetry analysis of DFT-optimized structures. The monticellite phase exhibits maximum crystal field splitting due to its octahedral geometry, whereas the akermanite phase, with its distinct dodecahedral geometry, displays maximum emission intensity, an extended decay time, and the highest quantum yield (QY). The modification of photoluminescence properties of the three phases is analyzed in detail based on the coordination geometry and the distortion in local sites due to Eu³⁺ doping in the Ca and Mg sites. CIE color chromaticity analysis confirms the orange-red emission with 91.94 %, 90.88 % and 90.24 % color purity for akermanite, monticellite and merwinite phases respectively. Hence, the present study throws light on the potency of the akermanite phase of CMS: Eu³⁺ phosphor with 70 % QY as the optimal matrix for Eu³⁺ ions over monticellite and merwinite host matrices.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Synthesis, structural characterization and intense far-red luminescence of Mn4+ -activated SrLaMgTa1-yAlyO6 oxide phosphors","authors":"","doi":"10.1016/j.jlumin.2024.120892","DOIUrl":"10.1016/j.jlumin.2024.120892","url":null,"abstract":"<div><p>The transition metal Mn⁴⁺ activated phosphors have attracted increasing attention due to the potential uses in phosphor-converted lighting emitting diodes (LEDs). Herein, the far-red emitting SrLaMgTa_1-yAl_yO₆:Mn⁴⁺ (y = 0−0.15) oxide phosphors were successfully synthesized by the high-temperature solid state reaction, in which the Mn⁴⁺ acted as an activator. The monoclinic double perovskite crystal structure, chemical composition, and 4+ state of activator Mn were confirmed by means of X-ray diffraction Rietveld refinement, scanning electron microscopy elemental mapping, and X-ray photoelectron spectroscopy. The optical properties were characterized with photoluminescence excitation and emission spectra, temperature-dependent emission spectra, and electroluminescence spectra. The excitation spectra are interweaved with the ligand-to-metal charge transfer band of Mn−O and intrinsic transitions (⁴A_2g→⁴T_1g, ⁴A_2g→²T_2g, and ⁴A_2g→⁴T_2g) of Mn⁴⁺, locating at the ultraviolet and blue light region. The emission spectra mainly contain a dominant far-red emission band from 650 to 775 nm with peaks at 695 and 708 nm, which are ascribed to the ²E_g→⁴A_2g transition of Mn⁴⁺. Moreover, the cationic substitution strategy with tiny Al³⁺ occupying Ta⁵⁺ octahedral site, promotes the improvement of luminescence intensity and optical thermal stability. The quantum yield of optimal phosphor reaches 88.2 % and the fluorescence intensity at 373 K (100 °C) retains 83.4 % in respect to that at ambient temperature, implying the phosphor with intense and thermally stable luminescence. The phosphor is packaged with 365 nm chip to fabricate an LED device, and the electroluminescence result is quite consistent with the photoluminescence, matching well with the absorption spectrum of the phytochrome. The Mn⁴⁺ activated oxide phosphors with intense far-red emission are promising for plant cultivation lighting.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Harnessing the inherent photoluminescence of Ba2MgTeO6 double perovskite phosphor for visible to near infrared pc-LED applications","authors":"","doi":"10.1016/j.jlumin.2024.120889","DOIUrl":"10.1016/j.jlumin.2024.120889","url":null,"abstract":"<div><p>Phosphor-converted LEDs (pc-LEDs) emitting in the visible region based on undoped tellurate double perovskites have not been explored till now. A cyan-emitting pc-LED is fabricated using the host Ba₂MgTeO₆ double perovskite for the first time. The as-fabricated cyan LED emits light in the visible region with the maximum emission at 484 nm. The obtained CIE coordinates of (0.26, 0.37) ensure a cyan light, and LED exhibits superior color stability even at higher input drive current. An attempt to develop a white emitting phosphor was done by substituting Eu³⁺ ions into the Ba₂MgTeO₆ matrix. Followed by this, a phosphor converted LED emitting in the bluish white region was fabricated by combining near UV chip and BMTO: 0.02 Eu³⁺ phosphor. Further, an inherent near-infrared (NIR) luminescence in Ba₂MgTeO₆ is also discovered and it originates from the ³T_1u, ³A_1u – ¹A_1g electronic transitions within the Te⁴⁺ ions. Upon 367 nm excitation, Ba₂MgTeO₆ exhibits strong broadband NIR emission, which spans from 780 nm to 1150 nm with a maximum emission at 889 nm and full width at half maximum (FWHM) of about 115 nm. Finally, an efficient pc-LED emitting in the NIR region is fabricated using the intrinsic near-infrared luminescence observed in the Ba₂MgTeO₆ phosphor. The pc-LED covering the near infrared region can be potentially used for various applications, including plant cultivation, biosensors, night vision cameras, etc.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142228845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Controlling the spontaneous emission of the telecom O-band centers in Silicon-on-Insulator with coherent dipole-quadrupole interactions on a silicon pillar lattice","authors":"","doi":"10.1016/j.jlumin.2024.120881","DOIUrl":"10.1016/j.jlumin.2024.120881","url":null,"abstract":"<div><p>The G-center in silicon-on-insulator (SOI) has emerged as a relevant single photon source due to the zero-phonon line at 1278 nm, matching the O-band of optical telecommunication wavelengths. Due to the weak emission of the G-center from planar SOI, it is necessary to enhance its emission, in terms of collection efficiency and fluorescence enhancement, to further study its optical properties for application in quantum technologies. Here we design a fabrication-ready SOI Mie-resonator made of a lattice of silicon nanopillars on silica to achieve the spontaneous emission enhancement of single G-centers. Using Si nanopillars lattice on silica with period and dimensions optimized, owing to the coherent superposition of the electric dipolar and magnetic quadrupolar electromagnetic Mie-scattering moments of the individual pillars to the periodic lattice, we show the G-center emission/decay rate enhancement averaged over it's possible dipole orientations is about 13 times compared to bulk. This corresponds to a fluorescence enhancement of about 125 times compared to bulk and about 5-6 times compared to an optimized single pillar with photon collection with a confocal objective. These results provide a fabrication pathway for out-of-plane single photon collection from the SOI G-center or other telecom O-band single-photon sources for their potential deployment in CMOS-compatible quantum optical technologies.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022231324004459/pdfft?md5=b4b17d53b07491f6e43a263da7dbdee3&pid=1-s2.0-S0022231324004459-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rare earth Nd3+-doped organic-inorganic hybrid perovskite quantum dots for white LED","authors":"","doi":"10.1016/j.jlumin.2024.120876","DOIUrl":"10.1016/j.jlumin.2024.120876","url":null,"abstract":"<div><p>Lead halide perovskite quantum dots (QDs) have garnered significant attention due to their tunable band gaps, unique quantum confinement effects, and high photoluminescence quantum yields (PLQYs). Among them, Organic-inorganic QDs make them promising candidates for optoelectronic devices such as quantum dot light-emitting diodes (QLEDs), solar cells, lasers, and photodetectors. However, the toxicity of lead (Pb) has raised environmental and health concerns, hindering their industrial application. To alleviate concerns about heavy metals Pb, extensive research has been conducted on B-site doping and the development of lead-free perovskites. Herein, we firstly developed B-site doping strategy on organic-inorganic hybrid perovskite QDs via rare-earth elements. Neodymium (III) (Nd³⁺) doped FAPbBr₃ QDs were prepared through the ligand-assisted reprecipitation method at room temperature. The B-site doping strategy could alleviate the heavy metal problem of Pb and modulate the band gap of FAPbBr₃ QDs facilely. The results demonstrated that increasing the concentration of Nd³⁺ can change the emission of FAPbBr₃ QDs from pure green to deep blue. Specifically, we achieved highly pure blue emission (∼438 nm) with a full width at half maximum (FWHM) of 13 nm for Nd³⁺-doped FAPbBr₃ QDs. Time-resolved photoluminescence (TRPL) spectroscopy revealed a decrease in the lifetime of FAPbBr₃ QDs from 22.86 to 15.46 ns as the doping concentration increased. Additionally, we fabricated a white LED (WLED) utilizing blue-emitting Nd³⁺-doped FAPbBr₃, green-emitting FAPbBr₃ QDs, and red QDs, achieving a white emission color coordinate of (0.33, 0.36). This study pioneers the application of B-site rare-earth doping in organic-inorganic hybrid perovskite QDs, demonstrating that B-site composition engineering is a reliable strategy to further exploit the perovskite family for wider optoelectronic applications.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 inorganic compound size on the relative gain of polymer-based optical waveguide amplifiers","authors":"","doi":"10.1016/j.jlumin.2024.120872","DOIUrl":"10.1016/j.jlumin.2024.120872","url":null,"abstract":"<div><p>Polymer based waveguide amplifiers are the key devices to improve the performance of integrated communication systems. However, due to their comparatively low relative gain, their widespread practical application has been limited. In polymer based optical waveguide amplifiers, the size of inorganic compounds in the composite gain media has a significant impact on the gain performance of the amplifier. Up to now, there has been limited research on the size influence of inorganic compound on the gain variation in organic polymer based optical waveguide amplifiers. In this study, a series of NaLu_0.8-xY_xF₄: Yb, Er-PMMA composite polymer were used as gain media to prepare organic waveguide amplifiers working in the C-band (1530–1565 nm). The size of NaLu_0.8-xY_xF₄: Yb, Er compounds varies between 20 nm and 150 nm. In the polymer based optical waveguide amplifiers, variations in the size of the inorganic NaLu_0.8-xY_xF₄:Yb,Er compound affects not only the C-band emission intensity but also the relative gain. When the size of the inorganic compound is 65 nm, the composite gain media exhibits the maximum emission peak intensity at 1550 nm and the corresponding device achieves a maximum relative gain of 19.3 dB/cm. Our results show that the size of inorganic compounds affects the variation of luminescence intensity and ultimately the gain of waveguide amplifiers. The gain of future polymer optical waveguide amplifiers can be improved by this method.</p></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}