Schottky effect mechanism in poly(pyromellitic-4,4-diphenyl sulphone) films

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

“…This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

“…where e is the elementary charge; ε 0 is the vacuum dielectric constant; ε is the dielectric constant of dielectric; E is the external electric field strength; and β sc is the Schottky coefficient. This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

“…This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

“…where e is the elementary charge; ε 0 is the vacuum dielectric constant; ε is the dielectric constant of dielectric; E is the external electric field strength; and β sc is the Schottky coefficient. This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

Surface morphology and effect of particle sizes on the electrical conductivity of FeAl2O3 composite

“…)are being more nearly to theoretical αP.F, that indicates the Paul Frenkel is dominated mechanism, so the applied filed is sufficient to modify the thermally excited electron inside the composite FeAl 2 O 3 and estimated α's Values from Schottky and Frenkel theories and the dielectric constant for composite samples . From the relationship between log (Io/ T 2 ) versus reciprocal temperature (Richardson plot), where Io the extrapolation of current value to zero applied field, the lowering of the work function for the thermionic emission due to the Schottky effect can be determined from [28]: Δɸ=√ 𝑒𝐸 4𝜋𝜖𝜖₀ (5) These are shown in figure (10)…”

Electrical Properties of poly Vinyl Alcohol (PVA) doped with Alizarin orang Azo dye thin films prepared by cast method.

“…The non linear relationship at high field gives a clear evidence that neither Schottky nor Poole -Frenkel effect mechanism could be speculated to explain the results. The Schottky expression is given by[23].The theoretical values of α sch and α PF are calculated from the following relations: 2α sch ……………..(7)where E is the applied field, Φ: the work function of the polymer metal interface, e :The charge on an electron,0  : The permittivity of free space  : The high frequency relative dielectric constant The experimental values of α can be obtained from the slope of fig (11) measured in the high field region.…”

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

“…This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

“…where e is the elementary charge; ε 0 is the vacuum dielectric constant; ε is the dielectric constant of dielectric; E is the external electric field strength; and β sc is the Schottky coefficient. This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

Surface morphology and effect of particle sizes on the electrical conductivity of FeAl2O3 composite

“…)are being more nearly to theoretical αP.F, that indicates the Paul Frenkel is dominated mechanism, so the applied filed is sufficient to modify the thermally excited electron inside the composite FeAl 2 O 3 and estimated α's Values from Schottky and Frenkel theories and the dielectric constant for composite samples . From the relationship between log (Io/ T 2 ) versus reciprocal temperature (Richardson plot), where Io the extrapolation of current value to zero applied field, the lowering of the work function for the thermionic emission due to the Schottky effect can be determined from [28]: Δɸ=√ 𝑒𝐸 4𝜋𝜖𝜖₀ (5) These are shown in figure (10)…”

Electrical Properties of poly Vinyl Alcohol (PVA) doped with Alizarin orang Azo dye thin films prepared by cast method.

“…The non linear relationship at high field gives a clear evidence that neither Schottky nor Poole -Frenkel effect mechanism could be speculated to explain the results. The Schottky expression is given by[23].The theoretical values of α sch and α PF are calculated from the following relations: 2α sch ……………..(7)where E is the applied field, Φ: the work function of the polymer metal interface, e :The charge on an electron,0  : The permittivity of free space  : The high frequency relative dielectric constant The experimental values of α can be obtained from the slope of fig (11) measured in the high field region.…”

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

“…This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

“…where e is the elementary charge; ε 0 is the vacuum dielectric constant; ε is the dielectric constant of dielectric; E is the external electric field strength; and β sc is the Schottky coefficient. This ability for an external electric field to reduce the interface barrier is called the Schottky effect [31]. To reduce the number of electrons injected from the metal, the Schottky effect must be suppressed.…”

Surface morphology and effect of particle sizes on the electrical conductivity of FeAl2O3 composite

“…)are being more nearly to theoretical αP.F, that indicates the Paul Frenkel is dominated mechanism, so the applied filed is sufficient to modify the thermally excited electron inside the composite FeAl 2 O 3 and estimated α's Values from Schottky and Frenkel theories and the dielectric constant for composite samples . From the relationship between log (Io/ T 2 ) versus reciprocal temperature (Richardson plot), where Io the extrapolation of current value to zero applied field, the lowering of the work function for the thermionic emission due to the Schottky effect can be determined from [28]: Δɸ=√ 𝑒𝐸 4𝜋𝜖𝜖₀ (5) These are shown in figure (10)…”

Electrical Properties of poly Vinyl Alcohol (PVA) doped with Alizarin orang Azo dye thin films prepared by cast method.

“…The non linear relationship at high field gives a clear evidence that neither Schottky nor Poole -Frenkel effect mechanism could be speculated to explain the results. The Schottky expression is given by[23].The theoretical values of α sch and α PF are calculated from the following relations: 2α sch ……………..(7)where E is the applied field, Φ: the work function of the polymer metal interface, e :The charge on an electron,0  : The permittivity of free space  : The high frequency relative dielectric constant The experimental values of α can be obtained from the slope of fig (11) measured in the high field region.…”