What is a semiconductor?
Objects in life can be roughly divided into three categories according to their conductivity: conductors, semiconductors, and insulators. Conductors: have a relatively high conductivity, ranging from 104S/cm to 106S/cm, such as metals such as aluminum, silver, and copper. Insulators: have a very low conductivity, ranging from about 20-18S/cm to 10-8S/cm, such as fused quartz and…