GaN Material Properties

In this chapter, Chien-Chung Lin and Shyh-Chiang Shen delve into the unique material properties and crystalline structures of Gallium Nitride (GaN) and related III-N semiconductor materials, highlighting their potential for power electronic systems. GaN, with its wide bandgap and direct bandgap nature, offers significant advantages such as high breakdown fields, low on-state resistance, and efficient carrier transport. The authors discuss GaN’s lattice mismatch challenges and epitaxial growth on various substrates like sapphire, SiC, and silicon. They emphasize the importance of strain management and buffer layers in GaN technology development. Additionally, they explore the role of polarization effects in bandgap engineering and electron transport, illustrating how these properties enable advanced GaN-based devices like high-electron-mobility transistors (HEMTs).