Best scientific research 2022
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BEST SCIENTIFIC
RESEARCH - 2022 227 const e = + = 0 (3) It is the same everywhere in the p-n junction diode. , = n j , 0 kT c e N n = , ln 0 c N n kT = en j = dx dn eD en N n kT e en j n n c n n + = + = ln (4) Here n n m e = - electron mobility, − collision time. As a result of the external influence, the current of electrons in the p-n transition in the electron gas becomes zero. The thermodynamic equilibrium is disturbed, ( ) e + = 0 and the gradient of the electrochemical potential is different from zero. If 0 it depends on the coordinate, the concentrations of electrons and holes also depend on the coordinate. As the temperature of the charge carriers varies throughout the sample, any change in temperature causes the chemical potentials of electrons and holes to separate differently. Due to this, a quasi-potential difference occurs between points with different concentrations of charge carriers. This turns the diode into a source of EC [14]. The charge carriers in the diode do not change when heated, but change. For this reason, the uniform heating of the current carriers along the sample creates the current. The current associated with the heating of charge carriers accelerates the recombination process. The heating of the charge carriers in the p-n junction increases the recombination currents in the diode. Heating increases the diffusion current. An increase in the temperature of electrons causes an increase in the diffusion coefficient. This causes heated charge carri ers to form ЕУК in the calculation of the concentration gradient. If there is no heating and lighting, EYuK will not be produced. In order to produce ЕУК, it is necessary to debalance the gas of electrons and holes without applying voltage to the sample. The electron-hole gas in the p-n transition is out of balance under the influence of the electric field and light [15]. |
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