200 watt led floodlights knowledge - the relationship between semiconductor and temperature in solar cells

From ultra-low temperature to room temperature, the electrical conductivity of metals has been reduced by nearly an order of magnitude, and the conductivity of semiconductors has increased by several orders of magnitude from ultra-low temperature to room temperature. How did this difference arise? The electrical conductivity σ (S/cm) of the substance is determined by the charge e(C) of the electron, the carrier density n (cm-3), and the mobility p (cm/(Vs)).

Since the carrier density n is constant, the conductivity changes with temperature, and therefore. Mainly determined by p. Since the metal atoms become scattered under the influence of thermal vibration, the mobility is reduced at high temperatures. On the other hand, the reason why the semiconductor conductivity changes abruptly with temperature changes is due to several orders of magnitude change in the carrier density n. Therefore, in the case of a problem with the heat dissipation of the solar cell, even if it is placed under the solar energy, its photoelectric conversion rate will be problematic.