Compound semiconductors are materials made from two or more elements, typically combining elements from groups III and V of the periodic table. Common examples include gallium arsenide (GaAs) and indium phosphide (InP). These materials have unique electrical and optical properties, making them suitable for applications like LEDs, solar cells, and high-frequency electronics. Unlike traditional silicon-based semiconductors, compound semiconductors can efficiently emit light and operate at higher frequencies. This makes them essential in modern technologies, including telecommunications and optical devices. Their ability to handle high power and frequency makes them valuable in various advanced electronic applications.