Solar garden light battery knowledge: the difference between semiconductor and metal, chloroplast

Semiconductor materials are used in solar garden light batteries. The difference between metal and semiconductor is not only reflected in the conductivity, but also in the relationship between conductivity and temperature. As the temperature rises, the resistivity of the metal increases, that is, the conductivity decreases. In semiconductors, as the temperature increases, the resistivity decreases logarithmically, that is, the conductivity increases logarithmically. This is the biggest difference between metal and semiconductor. In addition, the electrical conductivity of a metal is an intrinsic property of a substance, and it is difficult to change its size. However, depending on the amount of impurities, the conductivity type of the semiconductor can be switched between n-type and p-type, and the conductivity can be controlled between the metal and the insulator, which is a characteristic unique to the semiconductor.