A metal-semiconductor junction is a boundary formed between a metal and a semiconductor material. This junction is crucial in electronic devices, as it influences the flow of electric current. When the two materials come into contact, charge carriers from the semiconductor can interact with the metal, creating a potential barrier that affects conductivity. The behavior of this junction is essential for the operation of devices like diodes and transistors. The properties of the junction depend on factors such as the type of metal used and the semiconductor material, which can be either silicon or gallium arsenide. Understanding these junctions helps in designing efficient electronic components.