DC electrical conductivity of semiconducting cobalt–phosphate glasses

Tawati, Daefalla M.; Adlan, M. Jamel Basha; Abdullah, M.J.

doi:10.1016/j.jnoncrysol.2011.02.011

Cited by 16 publications

(12 citation statements)

References 46 publications

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“…The conductivity for semiconducting cobalt-phosphate glasses has been measured at temperature range 213-530 K conductivity values reported were lower compared to our room temperature conductivity at 303K. From Mott's VRH conduction determined density of states N(E F ) at Fermi level is comparable to our results (14) . M. A. Salorkar et al ( 2021) have been reported 1.23x10 -5 (Ω m) -1 at x=0 mol% of Li 2 SO 4 composition, is agreed with our glasses (15) .…”

Section: Conductivitysupporting

confidence: 76%

“…The conductivity measured in the temperature range from 320 K to 610K varied in the range from 0.5x10 -4 (Ωm) -1 to 7.64x10 -3 (Ωm) -1 as shown in Figure 2 For the Non-Crystalline or amorphous solids or glass systems which are amorphous in nature they can exhibit temperature dependent conductivity and show thermally activated process of conductivity. To investigate the conduction mechanism in the present samples, we employed Mott's Small Polaron Hopping (SPH) model and variable range hopping (VRH) model (10)(11)(12)(13)(14).…”

Section: Conductivitymentioning

confidence: 99%

“…It is observed that the activation energy for Mott's (SPH) model lies in the range of 58 -409 meV (14,15) . The SPH model showed activation energy in the high-temperature regime, which is found to decrease with Li 2 O gradually.…”

Section: Conductivitymentioning

confidence: 99%

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DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Husenkhan¹,

Sankarappa²,

Malge³

2021

IJST

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Objectives: Investigation of electrical transport properties of glass system in the composition (P 2 O 5 ) 0.65−x (B 2 O 3 ) 0.1 (ZnO) 0.25 (Li 2 O) x where x=0.10, 0.15, 0.20, 0.25, 0.30, 0.35 and 0.40 and establish the conduction mechanisms. Methods: Glasses were synthesized using the standard melt quenching technique at 1473K. The samples were confirmed to be amorphous through XRD studies. An independent measurement of dc conductivity was carried out for temperature range 300-620K, by following two probe method. Findings: Conductivity of the present glasses is found to be of the order of 10 -3 (Ω m) -1 which is higher than the reported values for lithium-ion solid-state electrolytes. Conductivity variation with temperature obeyed Mott's Small Polaron Hopping at high temperatures and Variable Range Hopping at low temperatures. SPH model fits to the conductivity gave activation energies in the range 58-409 meV. VRH model fits gave density of states at Fermi level of the order of 10 23 eV -1 m -3 . The nano-crystallite phases identified and determined size found to be in the range 5-37 nm and considered to be a glass-nanocomposites. Novelty/Applications: For the first time, zinc-lithium-borophosphate glasses are investigated for conduction mechanisms. Activation energy and density of states at the Fermi level are determined. At high temperature Mott's SPH model and at low temperature Mott's VRH model are found to be suitable to explain conductivity of these glasses.

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Section: Conductivitysupporting

confidence: 76%

Section: Conductivitymentioning

confidence: 99%

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DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Husenkhan¹,

Sankarappa²,

Malge³

2021

IJST

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“…This evolution is more probably due to number carriers increase within TiO2 host matrix. Therefore, the gap must drop significantly, in good agreement with Burstein -Moss theory [28,29].…”

Section: Transmittance and The Optical Gap E Gsupporting

confidence: 60%

Synthesis of N-CNT/TiO₂composites thin films: surface analysis and optoelectronic properties

et al. 2020

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In this study, we have investigated the surface analysis and optoelectronic properties on the synthesis of N-CNT/TiO2 composites thin films, using sol gel method for a dye synthetized solar cell (DSSC) which is found to be simple and economical route. The titanium dioxide based solar cells are an exciting photovoltaic candidate; they are promising for the realization of large area devices. That can be synthetized by room temperature solution processing, with high photoactive performance. In the present work, we stated comparable efficiencies by directing our investigation on obtaining Sol Gel thin films based on N-CNT/TiO2, by dispersing nitrogen (N) doped carbon nanotubes (N-CNTs) powders in titanium tetraisopropoxyde (TTIP). The samples were assessed in terms of optical properties, using UV—visible absorption spectroscopic techniques. After careful analysis of the results, we have concluded that the mentioned route is good and more efficient in terms of optoelectronic properties. The gap of “the neat” 0.00w% N-CNT/TiO2 is of 3eV, which is in a good agreement with similar gap of semiconductors. The incorporated “w%NCNTs” led to diminishing the Eg with increasing N-CNTs amount. These consequences are very encouraging for optoelectronic field.

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“…Studies on vanadium due to their interesting optical, electrical and magnetic properties have significantly increased recently. Though studies on transition metal doped glasses can be found in the literature frequently [27][28][29][30][31][32][33][34][35][36][37], there are still components, compositions and properties that…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Optical, Thermal, Structural Investigation of Zinc-Borate Glasses Containing V2O5

Kılıç¹

2020

Adıyaman University Journal of Science

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Vanadium pentaoxide (V2O5) doped zinc borate (ZnB) oxide glasses that could be used in fiber optic cable cores in optoelectronics, in laser crystals in solar energy systems have been synthesized successfully. Structural characters of synthesized glasses were determined with differential scanning calorimeter (DSC) and Fourier-Transform infrared spectroscopy (FTIR).Glass transition (Tg), crystallization (Tc) and melting temperatures (Tm), and thermal stabilities (DT) of the glasses were determined and also their association with the change in V2O5 was explained. Structural units of boron and zinc that form the structure were determined according to FTIR data. As a result, it was determined that boron formed the glass matrix with BO3, BO4 and boroxol ring structural units; on the other hand, zinc contributed to the glass matrix with tetrahedral ZnO4 and octahedral ZnO6 structural units, and vanadium usually had modifier role in the structure with its VO4 and VO5 structural units. V2O5's presence in the structure with increasing amount changes thermal, structural and physical properties. Among the properties that significantly change, the most important one is optical properties. Indirect optical band gaps, Urbach energies, refractive index values of these synthesized samples were determined, and quite clear shifts towards red region were observed in the transmittance and absorption spectra. Optical band gap decreased to 1.24 eV from 2.55 eV with increasing amount of V2O5; on the other hand,

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DC electrical conductivity of semiconducting cobalt–phosphate glasses

Cited by 16 publications

References 46 publications

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Synthesis of N-CNT/TiO₂composites thin films: surface analysis and optoelectronic properties

Synthesis and Optical, Thermal, Structural Investigation of Zinc-Borate Glasses Containing V2O5

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DC electrical conductivity of semiconducting cobalt–phosphate glasses

Cited by 16 publications

References 46 publications

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Synthesis of N-CNT/TiO2composites thin films: surface analysis and optoelectronic properties

Synthesis and Optical, Thermal, Structural Investigation of Zinc-Borate Glasses Containing V2O5

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Product

Resources

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Synthesis of N-CNT/TiO₂composites thin films: surface analysis and optoelectronic properties