Best scientific research 2022
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BEST SCIENTIFIC
RESEARCH - 2022 226 When the external field changes, E(x) changes and the current density changes at each point of the p-n transition. If E(x) = 0 with the help of an external influence, the current in the p-n junction becomes a full diffusion current. (The diode goes to the fully open state.) So, the external voltage first changes the field current. According to the diode theory and the diffusion theory, VAX of the diode can be obtained when the electrons heat up and the grid heats up. 0 1 2 3 4 5 6 7 J, (A/cm 2 ) U, (V) Te1 Te2 Te3 Te1< Te2< Te3 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 Figure 2. VAX change under the influence of different temperatures When the potential barrier is fully opened by external voltage, it is equal to the maximum 0 0 n eD dx dn eD n e = current of electrons. If the value of the current is greater than the above diffusion current, the diode theory loses its power (diffusion theory too). Effects of electron and phonon heating on diffusion and field currents. In a strong electromagnetic field, the average kinetic energy of free charge carriers increases [13]. Thermodynamic equilibrium is broken. When the interaction of electrons and holes with crystal lattice defects and phonons is quasielastic, the distribution function of free charge carriers can be expressed by the electron temperature Bolsmann distribution function. In this case, quasi-Fermi levels can be introduced for electrons and holes. The currents and EICs in the diode depend on the temperature of the electron and cavity gas. In the absence of external influences, the Fermi quasi-states are the same for electrons and holes |
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