it should be a semiconductor.

semiconductor refers to a material whose conductivity is between conductor and insulator at room temperature. Semiconductors have applications in integrated circuits, consumer electronics, communication systems, photovoltaic power generation, lighting, high-power power conversion and other fields. For example, diodes are devices made of semiconductors.

No matter from the perspective of science and technology or economic development, the importance of semiconductors is enormous. Most electronic products, such as computers, mobile phones or digital recorders, are closely related to semiconductors.

The common semiconductor materials are silicon, germanium, gallium arsenide, etc. Silicon is the most influential one in the application of various semiconductor materials.