semiconductor material

Semiconductor materials are a type of solid material with conductivity properties between good conductors (such as metals) and insulators. They have an energy "threshold" - band gap, where electrons are confined in the valence band and unable to conduct electricity in the absence of external energy excitation; When electrons gain enough energy to cross this bandgap and enter the conduction band, they can move freely, forming an electric current. This energy transition is the core principle of semiconductor technology. Semiconductor technology is widely used in fields such as integrated circuits, consumer electronics, communication systems, photovoltaic power generation, lighting, and high-power power conversion.

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(1) Semiconductors are conductive materials between conductors and insulators, and are essential in modern electronics. Their unique ability to switch conductivity under specific conditions, such as temperature changes, supports the functionality of devices ranging from transistors to solar cells. Third generation semiconductors, such as silicon carbide and gallium nitride, have excellent thermal and electrical properties, representing significant progress in providing higher efficiency and durability in applications ranging from power electronics to LED lighting. (2) Principles of Semiconductors 1 Band structure: In solid-state physics, the electronic states of materials can be organized into energy bands. Semiconductors have a complete valence band and a partially filled conduction band. Electrons in the valence band cannot move freely, while electrons in the conduction band can move freely and conduct electricity. two Doping: Pure semiconductors (intrinsic semiconductors) have poor conductivity. By doping, that is, adding a small amount of impurities to semiconductor materials.