Optical and electrical properties of ammonium perchlorate doped with chromate ions

1976 ◽  
Vol 54 (16) ◽  
pp. 1669-1675 ◽  
Author(s):  
Ah Mee Hor ◽  
S. Radhakrishna ◽  
P. W. M. Jacobs
Keyword(s):  
Electrical Properties ◽  
Dielectric Loss ◽  
Optical Absorption ◽  
Raman Scattering ◽  
Charge Transport ◽  
Single Crystals ◽  
Ammonium Perchlorate ◽  
Dc Conductivity ◽  
Optical And Electrical Properties ◽  
Chromate Ions

The presence of CrO42− ions incorporated substitutionally in single crystals of NH4ClO4 grown from saturated solutions containing 0.1 mol% or 1 mol% CrO42− ion has been demonstrated by measurements of optical absorption, Raman scattering, dielectric loss, and ionic thermoconductivity. The three latter experiments also show the presence of dipoles associated with the CrO42− ions. The dc conductivity of NH4ClO4 crystals is enhanced by doping with CrO42− so that charge transport by defects introduced by the CrO42− ions is inferred. The implications of this finding with respect to mechanisms of charge transport in ammonium perchlorate are discussed.

Electrical Properties and DC Conductivity of Phosphoric Acid Doped TGS Single Crystals

2005 ◽  
Vol 323 (1) ◽  
pp. 145-149 ◽  
Author(s):  
Aparna Saxena ◽  
V. Gupta ◽  
V. Gulia ◽  
K. Sreenivas
Keyword(s):  
Electrical Properties ◽  
Phosphoric Acid ◽  
Single Crystals ◽  
Dc Conductivity

Effect of pressure on optical and electrical properties of tungsten diselenide single crystals

2004 ◽  
Vol 24 (2) ◽  
pp. 255-261 ◽  
Author(s):  
Tejal A. Patel ◽  
J. B. Patel ◽  
M. N. Parmar ◽  
G. K. Solanki ◽  
M. P. Deshpande
Keyword(s):  
Electrical Properties ◽  
Single Crystals ◽  
Optical And Electrical Properties ◽  
Tungsten Diselenide ◽  
Effect Of Pressure

scholarly journals Optical and Electrical Properties of Sn-Doped Zinc Oxide Single Crystals

2017 ◽  
Vol 47 (2) ◽  
pp. 1497-1504 ◽  
Author(s):  
M. S. Haseman ◽  
Pooneh Saadatkia ◽  
J. T. Warfield ◽  
J. Lawrence ◽  
A. Hernandez ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Electrical Properties ◽  
Single Crystals ◽  
Optical And Electrical Properties

Preparation and Study the Electrical and Optical Properties for (PVA-PEG-Sr2O3) Nanocomposites

2021 ◽  
Vol 19 (10) ◽  
pp. 47-55
Author(s):  
Safa Ahmed Jabbar Al-Rubaye ◽  
Nassar A. Al-lsawi ◽  
Ali R. Abdulridha
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Optical Properties ◽  
Electrical Properties ◽  
Dielectric Loss ◽  
Energy Gap ◽  
Antimony Oxide ◽  
Optical And Electrical Properties ◽  
Electrical And Optical Properties ◽  
Constant E

In the presented work, the optical and electrical properties of composite materials (PVA-PEG-Sr2O3) were measured, as the electrical properties were verified at various frequencies in range of 100 Hz-6 MHz. In addition, the experimental results showed that the increase in frequency causes a reduction in the dielectric loss (δ) and dielectric constant (ɛ), and there is an increase in ɛ due to the increase in the content of antimony oxide (Sr2O3). It increases with increasing frequency and decreases with increasing Sr2O3 content in PVA-PEG-Sr2O3 compounds, the result of the optical properties of the nanoparticles (PVA-PEG-Sr2O3) showed that the values transmittance and energy gap were reduced with the increases in the concentrations of Sr2O3 NPs, whereas the values related to extinction coefficient, absorption coefficient, optical conductivity, refractive index, and dielectric constant (imaginary, real) were increased with increase in the concentration of Sr2O3 NPs.

scholarly journals Optical and Electrical Properties of TiO2/Co/TiO2 Multilayer Films Grown by DC Magnetron Sputtering

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Marcos G. Valluzzi ◽  
Lucas G. Valluzzi ◽  
Marcos Meyer ◽  
María A. Hernández-Fenollosa ◽  
Laura C. Damonte
Keyword(s):  
Electrical Properties ◽  
Optical Absorption ◽  
Magnetron Sputtering ◽  
Absorption Edge ◽  
Multilayer Films ◽  
Optical And Electrical Properties ◽  
Optical Absorption Edge ◽  
Interlayer Thickness ◽  
Dc Magnetron Sputtering ◽  
Force Microscopy

Transparent oxide multilayer films of TiO2/Co/TiO2 were grown on glass substrate by DC magnetron sputtering technique. The optical and electrical properties of these films were analyzed with the aim of substituting ITO substrate in optoelectronic devices. The samples were characterized by UV-visible spectroscopy, atomic force microscopy (AFM), and Kelvin probe force microscopy (KPFM). The effect of Co interlayer thickness (4, 8, and 12 nm) on the transmittance spectra yielded an optical absorption edge shift. The work function of these films was determined by KPFM technique allowing us to predict the Fermi level shift by extending the model for pure materials to our multilayer system. The Fermi level and optical absorption edge seem to be correlated and shifted toward lower energies when Co interlayer thickness is increased.

Optical And Electrical Properties Of Doped Polysilanes

1993 ◽  
Vol 328 ◽  
Author(s):  
M. Kakimoto ◽  
H. Ueno ◽  
H. Kojima ◽  
Y. Yamaguchi ◽  
A. Nishimura
Keyword(s):  
Charge Transfer ◽  
Electrical Properties ◽  
Optical Absorption ◽  
Strong Interaction ◽  
Optical And Electrical Properties ◽  
Spectral Change ◽  
Iodine Doping ◽  
Spectral Changes ◽  
Doping Effects

ABSTRACTThe doping effects on optical and electrical properties of polysilanes have been investigated by in-situ Measurement. An optical absorption associated with σ–σ* transition was observed near 330 nm for polymethylphenylsilane. By iodine doping, a new absorption was observed at the longer wavelength around 420 nm, which should originate from the charge transfer between dopant and Σ-conjugated system. Similar spectral changes have also been observed for most of investigated linear polysilanes.Furthermore, we have found drastic spectral change upon iodine doping into polysilane with p-N,N-dimethyIaminophenyI substituent. It has very strong absorption up to 700 nm. It Might originate from a strong interaction between the substituent and iodine. At the same time, Σ-conjugation Might also play a significant role on doping into this system.

Cl Doping Effect by Thermal Treatment with KCl for ZnO Single Crystals

2011 ◽  
Vol 1288 ◽  
Author(s):  
Akira Fujimoto ◽  
Yoshiyuki Harada
Keyword(s):  
Electrical Properties ◽  
Thermal Treatment ◽  
Single Crystals ◽  
Surface State ◽  
Photoelectron Spectroscopy ◽  
Coated Sample ◽  
Optical And Electrical Properties ◽  
Donor Concentration ◽  
Uncoated Sample ◽  
X Ray

ABSTRACTWe investigated the optical and electrical properties of ZnO single crystals coated with KCl by examining the photoluminescence (PL) at 9 K and the temperature dependence of the carrier concentration. The band-edge PL intensity of the KCl-coated sample was much larger than that of the uncoated sample. Moreover, a substantial increase in Hall electrons was observed in the coated sample. X-ray photoelectron spectroscopy revealed bonding between chlorine and zinc atoms in the coated sample. Therefore, coating the surface of ZnO single crystals with KCl enhances the donor concentration and improves the surface state.

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