Optoelectronics - Materials and Techniques is the first part of an edited anthology on the multifaceted areas of optoelectronics contributed by a selected group of authors including promising novices to experts in the field, where are discussed related materials and techniques. Photonics and optoelectronics are making an impact multiple times the semiconductor revolution made on the quality of our life. In telecommunication, entertainment devices, computational techniques, clean energy harvesting, medical instrumentation, materials and device characterization and scores of other areas of R&D the science of optics and electronics get coupled by fine technology advances to make incredibly large strides