SOLUTION

• Silicon is the most widely used semiconductor material because it has a useful temperature range and is abundant, cheap, and easy to manufacture.
• Germanium was among the first semiconductor materials to be developed and is less widely used than silicon, but it is useful in very high-speed devices when alloyed with silicon.
• High-speed semiconductors widely use gallium-arsenide.
• It is the most commonly used material after silicon; however, it is more expensive and more difficult to manufacture.
• Silicon carbide has been used to create blue light-emitting diodes (LEDs), and it can withstand high operating temperatures.