A semiconductor is a material that conducts electricity between a conductor and an insulator at normal atmospheric temperature. Common semiconductor materials contains silicon, germanium, gallium arsenide, etc. Silicon is the most influential in the application of various semiconductor materials.
In terms of technology and economic development, the importance of semiconductors is indispensable. Semiconductors are broadly used in integrated circuits, consumer electronics, communication systems, photovoltaic power generation, lighting, high-power power conversion and other fields. LED is built on semiconductor transistor semiconductor light-emitting diode, which can realize planar encapsulation, low calorific value, energy conservation and efficient at work, long product life, fast response. At the same time, semiconductor refrigeration technology has been widely used in the field of medicine, industry, agriculture, astronomy and medical fields. The core units in most electronic products, such as computers, mobile phones or digital recorders, are closely linked to semiconductors.