Gallium arsenide (GaAs) is a compound semiconductor made from the elements gallium and arsenic. It is known for its high electron mobility, which allows for faster electronic devices compared to silicon. GaAs is commonly used in applications such as solar cells, light-emitting diodes (LEDs), and microwave frequency integrated circuits. One of the key advantages of GaAs is its ability to operate efficiently at high frequencies and temperatures. This makes it suitable for use in telecommunications and satellite technology. Additionally, GaAs has a direct bandgap, which enhances its performance in optoelectronic devices, making it a popular choice in the electronics industry.