Charge carriers diffusion

The amorphous orientation is considered a very important parameter of the microstructure of the fiber. It has a quantitative and qualitative effect on the fiber de-formability when mechanical forces are involved. It significantly influences the fatigue strength and sorptive properties (water, dyes), as well as transport phenomena inside the fiber (migration of electric charge carriers, diffusion of liquid). The importance of the amorphous phase makes its quantification essential. Indirect and direct methods currently are used for the quantitative assessment of the amorphous phase. 

For not too low doped samples (D W), however, the contribution of 1SCR is usually negligible. If the surface recombination velocity at the illuminated front is low, IBPC then only depends on sample thickness D, illumination intensity eP, and minority charge carrier diffusion length ID. 

The charge carrier diffusing more rapidly causes a gradient in the electrical potential V((), in which the transport of carriers with opposite charge is accelerated. At steady state, no charge accumulation occurs. The fluxes of ionic and electronic defects are therefore related to each other by the charge baleince... 

I he formation of one acrolein molecule per one reduced V ion shows that the charge compensation of V in M0O3 takes place at the expence of the V° 0 complex formation. Some deviations from this ratio can be explained by acrolein formation on other centres. Thus, the catalyst reduction by ally alcohol is described by the Equation (4). This process consists of at least of two steps the surface one (7), which proceeds with participation of the surface oxygen ion, and bulk step (8), when the charge carriers diffuse to the bulk and reduce the ions ... 

The first one, as we have already seen, is easily assimilated to the capacitance produced by the interface, and the second one is related to the formation of a charge carrier diffusion layer in the material. 

Under a pressure between 10 and lO Pa, and at a temperature in the 300 to 600°C range, analysis of the complex impedance spectrums show that, whatever the studied material (beta-alumina, glass, zirconia), oxygen pressure does not influence at all the parameters T and n which characterize the electrode-material interface. The capacitive effect and charge carrier diffusion in the material stay the same under all oxygen pressme values. 

Polymer Charge carrier diffusion coefficient (cm /s) Method Reference... 

Now the average distance that the charge carrier diffuses along the chain between hopping on and off is equal to (L(ic), given by... 

Upon a rise in temperature, a transition occurs from a regime of transport dominated by droplet motion and cluster rearrangement to one dominated by the motion of the charge carriers within a connected cluster of droplets. This transition results in a steep increase in charge carrier diffusion. The latter depends via a power law on the rate of cluster rearrangement. Whether or not a system percolates can be established only by verifying whether the experimental data obey the... 

Thurlow (1987) Evaluation of Crosstalk In Focal Plane Arrays Using Charge Carrier Diffusion Modehng by P. E. Thurlow, Proc. SPIE 0776 Metrology of Optoelectronic Systems, November 1987. 

Thurlow (1988) Principles and Applications Of Charge Carrier Diffusion Modeling by P. E. Thurlow, Santa Barbara Research Center Proc. SPIE Volume 0892 Simulation and Modeling of Optical Systems. 

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