Optoelectronics deals with the study and application of light-emitting or light-detecting devices. It is a distinct field of electronics. Optoelectronic devices include those that emit, channel, detect, or are controlled by light. The devices which emit light use voltage and current to produce electromagnetic radiation which is visible as light. Such light-emitting devices are commonly used for illumination or as indicator lights. Devices which are designed to convert electromagnetic energy into electric current or voltage are called light-detecting devices. They can be used for light sensing and communication purposes. Darkness-activated switches and remote controls are some examples of such devices. Light-detecting devices use photons to release bound electrons within semiconductor materials. LEDs, light bulbs, fiber optic cables, photodiodes, photoresistors, optoisolators and phototransistors are some examples of optoelectronic devices. This book provides comprehensive insights into the field of optoelectronics. It elucidates the concepts and innovative models around prospective developments with respect to this discipline. This book will help new researchers by foregrounding their knowledge in this branch.