Fotoenergetikada nanostrukturali yarimo‘tkazgich materiallar II xalqaro ilmiy anjumani

Fotoenergetikada nanostrukturali yarimo‘tkazgich materiallar

II xalqaro ilmiy anjumani 
 
19-20 noyabr 2021 yil 
52 
such systems is hopping, its temperature dependence should be described by the 
following equation 
σ = σ
0
/
exp [- (T
0 
/ T)
x
] , 
where x = (n + 1) / (n + d + 1), 
n
F
g
g
)
(
)
(
0





is the density of 
localized states, 
F

-is the Fermi level, and d is the dimension of space. 
By measuring the temperature dependence of the conductivity in the range 
from 100 to 450 K and analyzing this dependence in terms of the reduced 
activation energy of conductivity, it was found that in the materials under study 
containing nickel nanoparticles, in the region below the classical percolation 
threshold, in the high-temperature region, the main contribution to the electrical 
conductivity is made by the tunneling of carriers. charge with constant activation 
energy of conduction. At comparatively low temperatures, electrical transfer in 
samples is carried out by tunneling of charge carriers with a variable activation 
energy of conduction in the region of a parabolic quasigap in the density of 
localized states in the vicinity of the Fermi level [2]. An energy model of the 
structure is proposed that explains the physical properties of polymer composite 
materials containing metal nanoparticles. 
The possibility of using the percolation theory to study the structure, i.e. 
topology of an infinite cluster (IC) in electrically conductive inhomogeneous 
materials. The density, volume fraction, tortuosity, volume fraction of the skeleton 
and dead ends of an infinite cluster are determined depending on the size of metal