scholarly journals Electrical transport properties of CoMn0.2−xGaxFe1.8O4 ferrites using complex impedance spectroscopy

AIP Advances ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 055909 ◽  
Author(s):  
Chien-Yie Tsay ◽  
Yi-Hsiang Lin ◽  
Yao-Ming Wang ◽  
Horng-Yi Chang ◽  
Chien-Ming Lei ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Transport Properties ◽  
Electrical Transport ◽  
Complex Impedance ◽  
Complex Impedance Spectroscopy ◽  
Electrical Transport Properties

Frequency dependent electrical transport properties of 4,4′,4″-tris(N-3-methylphenyl-N-phenylamine)triphenylamine by impedance spectroscopy

2010 ◽  
Vol 160 (13-14) ◽  
pp. 1422-1426 ◽  
Author(s):  
Gayatri Chauhan ◽  
Ritu Srivastava ◽  
Priyanka Tyagi ◽  
Amit Kumar ◽  
P.C. Srivastava ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Transport Properties ◽  
Electrical Transport ◽  
Electrical Transport Properties ◽  
Frequency Dependent

Electrical transport properties and complex impedance investigation of Fe3+ and La3+ co-doping (Pb,Sr)TiO3 thin films

2018 ◽  
Vol 236-237 ◽  
pp. 179-188
Author(s):  
F.M. Pontes ◽  
D.S.L. Pontes ◽  
A.J. Chiquito ◽  
Y.N. Colmenares ◽  
V.R. Mastelaro ◽  
...  
Keyword(s):  
Thin Films ◽  
Transport Properties ◽  
Electrical Transport ◽  
Complex Impedance ◽  
Electrical Transport Properties ◽  
Co Doping

Complex impedance spectroscopy and ionic transport properties of natural leucite, K0.90Na0.08[Al0.98Si2.02]O6, as a function of temperature and pressure

2010 ◽  
Vol 74 (3) ◽  
pp. 507-519 ◽  
Author(s):  
R. L. Jones ◽  
M. Thrall ◽  
C. M. B. Henderson
Keyword(s):  
Dielectric Properties ◽  
Impedance Spectroscopy ◽  
Transport Properties ◽  
Complex Impedance ◽  
Ionic Transport ◽  
Ionic Mobility ◽  
Activation Energies ◽  
Complex Impedance Spectroscopy ◽  
Phase Assemblage ◽  
Temperature And Pressure

AbstractThe temperature (T) and pressure (P) dependence of dielectric and conductivity properties of natural leucite were determined using complex impedance spectroscopy at frequencies from 103 to 106 Hz. Experiments were carried out in a Walker multi-anvil cell at 1 atm and P from 2.5 to 6 GPa and at T from 350 to 800°C. At pressure >6 GPa and temperature >790°C the leucite broke down to kalsilite+sanidine and dielectric properties for this phase assemblage are given at 6.0–7.0 GPa and T to 1050°C.Leucite conductivity increases with increasing T and decreases with increasing P reflecting their different effects on migration of K cations within the channels in the leucite aluminosilicate framework. Activation energies for K+ migration in leucite increase with increasing pressure (0.74–0.97 eV; 70.0–93.2 kJ/mol) and activation volumes for leucite increase with increasing T (6.42–9.51 cm3/mol; 400–700°C). The latter data provide model K+ cation diameters increasing from 2.7 Å at 400°C to 3.2 Å at 700°C. These values are consistent with the earlier suggestion of Palmer and Salje that the ionic mobility mechanism consists of diffusion along <110> rather than along the main channels parallel to <111>.

scholarly journals Study of Electrical Transport Properties of Thin Films Used as HTL and as Active Layer in Organic Solar Cells, through Impedance Spectroscopy Measurements

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Camilo A. Otalora ◽  
Andres F. Loaiza ◽  
Gerardo Gordillo
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Impedance Spectroscopy ◽  
Transport Properties ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Electrical Transport ◽  
Hole Transport ◽  
Transport Layer ◽  
Electrical Transport Properties

Impedance spectroscopy (IS) is used for studying the electrical transport properties of thin films used in organic solar cells with structure ITO/HTL/active layer/cathode, where PEDOT:PSS (poly(3,4-ethylenedioxythiophene):polystyrene sulfonic acid) and CuPC (tetrasulfonated copper-phthalocyanine) were investigated as HTL (hole transport layer) and P3HT:PCBM (poly-3-hexylthiophene:phenyl-C61-butyric acid methyl ester) blends prepared from mesitylene and chlorobenzene based solutions were studied as active layer and Ag and Al were used as cathode. The study allowed determining the influence of the type of solvent used for the preparation of the active layer as well as the speed at which the solvents are removed on the carriers mobility. The effect of exposing the layer of P3HT to the air on its mobility was also studied. It was established that samples of P3HT and P3HT:PCBM prepared using mesitylene as a solvent have mobility values significantly higher than those prepared from chlorobenzene which is the solvent most frequently used. It was also determined that the mobility of carriers in P3HT films strongly decreases when this sample is exposed to air. In addition, it was found that the electrical properties of P3HT:PCBM thin films can be improved by removing the solvent slowly which is achieved by increasing the pressure inside the system of spin-coating during the film growth.

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