MindMap Gallery Semiconductor properties
1. Semiconductor basics: refers to a type of material opposite to conductors and insulators, with conductive properties between the two. 2. Material classification: Semiconductor materials can be divided into two categories: crystalline semiconductors and amorphous semiconductors. Crystalline semiconductors have better electron mobility. 3. Common semiconductor materials: including elements such as silicon and germanium, which can be doped to achieve the preparation and application of semiconductor devices. 4. Conductivity: The conductivity of semiconductors is determined by factors such as doping and temperature. The conductive properties can be changed by controlling the type and concentration of doping elements. 5. Energy band structure: The energy band structure of a semiconductor determines its conductive properties, including valence band and conduction band. The transition of electrons between energy bands leads to conductive phenomena. 6. P-type semiconductor: By doping a small amount of trivalent elements (such as boron) into the semiconductor, positively charged holes are formed, making it a P-type semiconductor. 7. N-type semiconductor: By doping a small amount of pentavalent elements (such as phosphorus) into the semiconductor, negative charged free electrons are formed, making it an N-type semiconductor. 8. PN junction: The structure formed by combining P-type semiconductor and N-type semiconductor has characteristics such as rectification and light emission, and is widely used in optoelectronic devices. 9. Optoelectronic properties: Semiconductor materials have photoelectric conversion properties and can realize the preparation and application of photodiodes, solar cells and other devices. 10. Temperature characteristics: Semiconductor properties change with changes in temperature. An increase in temperature will lead to a decrease in conductive properties. The impact of temperature on semiconductor devices needs to be considered.
Edited at 2022-07-11 00:44:37