Obtained results indicated that thermionic emission
cannot be the dominant current conduction mechanism in the MPS structure.
A fit of the experimental data suggests that carrier injection into the organic layer is mediated by thermionic emission
. The energy level alignment through the whole heterostructure suggests that conduction in the device is dominated by holes.
The electrode-limited conduction mechanisms include (1) Schottky or thermionic emission
, (2) Fowler-Nordheim tunneling, (3) direct tunneling, and (4) thermionic-field emission.
The absence of a single linear region on semi-log IV curves is observed for these devices, which is inconsistent with thermionic emission
. Linear regions with two different slopes observed on a log-log scale could explain this behavior, where at lower voltages the charge transport mechanism is consistent with Ohm's law but at higher voltages the charge transport is consistent with Child's law of space-charge-limited emission.
However, the content of the Pd and Si[O.sub.2] in mixture is uniform, and the thermionic emission
over the metal-semiconductor barrier and the insulator-semiconductor barrier is responsible for carrier transport.
According to the thermionic emission
model, for a metal/semiconductor (M/S) or metal/polymer (M/P) contact [39-42], the I-V characteristic under the forward and reverse bias voltages through an SBD can be represented as
Tenders are invited for Supply Installation Commissioning Demonstration And Training Of Thermionic Emission
Type Scanning Electron Microscope
- Part 8: Delivery of educational kits to the visualization of elementary particles - Foggy chamber, measuring an electric charge, the study of cathode rays and thermionic emission
, the photoelectric effect,