研究目的
To study the luminescence and dielectric properties of Ni2+ ions added to calcio yttria borophosphate glasses for optoelectronic applications, including understanding the structural, optical, and electrical characteristics influenced by varying NiO concentrations.
研究成果
The Ni2+ doped calcio yttria borophosphate glasses exhibit enhanced luminescence and dielectric properties, with optimal performance at 0.5 mol% NiO concentration. The materials show potential for optoelectronic applications, such as red emissive lasers, due to their high emission cross section, transition probability, and covalently linked structure. Future studies should focus on further optimizing the composition and testing in real-world devices.
研究不足
The study is limited to specific glass compositions with NiO concentrations up to 0.5 mol%. Potential areas for optimization include exploring higher NiO concentrations, varying other components, and investigating long-term stability and practical device integration for optoelectronic applications.
1:Experimental Design and Method Selection:
Glass samples with composition (30-x) CaO – 05 Y2O3 – 10 B2O3 – 55 P2O5: x NiO (x=0 to 0.5 mol%) were synthesized using conventional rapid melt quenching method. Various characterization techniques were employed, including differential thermal analysis, thermoluminiscence, optical absorption, photoluminescence, ionic conductivity, and dielectric dispersion studies.
2:5 mol%) were synthesized using conventional rapid melt quenching method. Various characterization techniques were employed, including differential thermal analysis, thermoluminiscence, optical absorption, photoluminescence, ionic conductivity, and dielectric dispersion studies. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Samples were prepared with different NiO concentrations (0, 0.1, 0.2, 0.3, 0.4, 0.5 mol%) using analytical grade powders of CaO, Y2O3, B2O3, P2O5, and NiO.
3:1, 2, 3, 4, 5 mol%) using analytical grade powders of CaO, Y2O3, B2O3, P2O5, and NiO. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes a programmed automatic temperature furnace, agate mortar, brass mould, muffle furnace, Ohaus digital balance, SHIMADZU XRD-7000, S-3700N (Hitachi) SEM, DTG-60H, thermoluminiscence reader (nucleonix systems), JASCO Model V-670 UV-VIS-NIR spectrophotometer, Edinburgh Instruments FLSP 920 system, ultrasonic piezoelectric crystal oscillator, LCR Meter (Hewlett-Packard Model-4263B), and KEITHLY Electrometer model 6514. Materials include CaO, Y2O3, B2O3, P2O5, and NiO powders.
4:Materials include CaO, Y2O3, B2O3, P2O5, and NiO powders. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Powders were mixed, melted at 1120-1150°C for 1 hour, poured into a brass mould, annealed at 380°C with a cooling rate of 5°C/min, and optically refined to dimensions of 1cm x 1cm x 0.2cm. Measurements included density, XRD, SEM, EDS, DTA, thermoluminiscence, optical absorption, photoluminescence, elastic properties, DC and AC conductivity, and dielectric properties.
5:2cm. Measurements included density, XRD, SEM, EDS, DTA, thermoluminiscence, optical absorption, photoluminescence, elastic properties, DC and AC conductivity, and dielectric properties. Data Analysis Methods:
5. Data Analysis Methods: Data were analyzed using specific formulas for physical properties (e.g., polaron radius, optical basicity), elastic moduli, trap depth parameters, optical band gap, nephelauxetic ratio, emission cross section, transition probability, and dielectric parameters. Statistical analysis and software tools were not specified.
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XRD Instrument
XRD-7000
SHIMADZU
Confirming amorphous state of the glasses.
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SEM
S-3700N
Hitachi
Recording SEM images of the samples.
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UV-VIS-NIR Spectrophotometer
V-670
JASCO
Recording optical absorption spectra in wavelength range 300-2200 nm with resolution of 0.1 nm.
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Photoluminescence System
FLSP 920
Edinburgh Instruments
Carrying out excitation, photoluminescence, and lifetime measurements with Xe lamp and flash lamps.
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Digital Balance
Ohaus
Ohaus
Measuring mass of glasses with precision of 0.1 mg for density estimation.
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DTA Instrument
DTG-60H
Recording differential thermal analysis spectra from 27°C to 1200°C.
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Thermoluminiscence Reader
nucleonix systems
Recording thermoluminiscence from ambient to 300°C with heating rate of 5°C/s.
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Ultrasonic Piezoelectric Crystal Oscillator
Measuring elastic properties such as longitudinal and shear velocities.
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LCR Meter
4263B
Hewlett-Packard
Recording dielectric measurements.
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Electrometer
6514
KEITHLY
Recording DC conductivity measurements.
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