Chapter 12, Problem 12.101SP

Interpretation Introduction

Interpretation:

The LED semiconductors of gallium, arsenic, and aluminium should be arranged in the order of increasing band gap energy.

Concept introduction:

Semiconductors are devices that have conductivity intermediate between conductors and insulators and their conductivity gets enhances when doped.

Doped semiconductors are used in commercial electronic devices such as: diodes, transistors, LEDs, photovoltaic cells. They all differ in their functions that are as follows:

• Diodes convert alternating current to direct current.
• Photovoltaic cells convert sunlight to electricity.
• LEDs act as a light source.
• Transistors amplify an electrical signal in an integrated circuit.