Best scientific research 2022
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- Figure 1. VAX change under the influence of different photocurrent and O`YuCh
BEST SCIENTIFIC
RESEARCH - 2022 223 In this work, we want to interpret the change of the volt-ampere characteristic of the photocell under the influence of a very high frequency wave and its reasons, the reasons for the change of the Fermi quasi-states by zones. When the electron- hole gas is heated by means of a ХХ wave, the Fermi quasi-levels move away from their zones. As a result, diffusion currents of heated electrons and holes in the p=n region of the photocell increased. This, in turn, causes an increase in the recombination current in the diode. Recombination currents create direct currents in the diode. The generation is strong, and when the heating is weak, the photocurrent flows from the diode in the opposite direction [7-9]. This photocurrent is smaller than the photocurrent without heating. In other words, heating reduces the photocurrent. If e h T T T = we introduce a condition equal to then − = − + = − − − − 1 1 ) ( ) ( 0 0 0 0 e e kT U e kT e s kT U e kT e p h n n e p e j e L ep L en j (1) we get VAX for a heated electron or hole. If you add a photocurrent to the full current, you get VAX ( ) ` ) ( kT e 0 0 0 0 0 0 0 0 1 e 0 0 f kT U e l l l l L x x l L x l l V n I L en e L en dx e I h e dx ne e dx h I e dx n e GdV RdV dV G R j e s + − − − = − = − = − = − = − − − − − if the temperature of the charge carriers is equal to each other f kT U e kT e s f kT U e kT e p h n n e p I e j I e L ep L en j e e − − = − − + = − − − − 1 1 ) ( ` ) ( 0 0 0 0 (2) we will have an expression. If we see the VAX graph through the transcendental expressions obtained for the current and photocurrent of heated electrons and holes. Under the influence of different photocurrents, VAX at different temperatures is e = 1.6*10(-19); k = 1.38*10(-23); T = 300; Js = 10(-9); Jf1 =0.1, Jf2 =0.3, Jf3 = 0.5; Eg = 1.1; BEST SCIENTIFIC RESEARCH - 2022 224 varphi = 0.6; Te1 = 1500; Te2= 2000; We can put Te3= 2500 values. even when there is a photo effect, VAX shifts from quadrants 1, 3, 4 to 1, 2, 3 quadrants due to heating. Figure 1. VAX change under the influence of different photocurrent and O`YuCh From the obtained graphs, we can see that the recombination currents increase under the influence of UV, and the generation currents increase under the influence of light. The reason is that the change in the concentration of main and non-main charge carriers at the limit of volume charge depends on the temperature. The crystal lattice temperature strongly affects the saturation current [10]. When the heating of electrons is strong, the recombination currents become larger than the generation currents. In this case, the diode receives energy mainly from microwaves. In this case, recombination currents occur in the p-n transition region (volumetric charge region) due to injection from the opposite side of the p-n transition to the n- and p- regions of the diode. The concentration of non-primary charge carriers increases due to the heating of the main charge carriers and their injection in the opposite field due to the increase of recombination currents due to heating. The increase of recombination currents is related to the increase of diffusion currents in the p-n junction [11]. Electron injection is performed by changing the electron temperature and the height of the p-n junction potential barrier. When the electrons and holes are heated under the influence of the УХХ wave, they recombine in the field of p-n discharge volume charge or in the quasi-neutral field after p-n |
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