Basics of Optical Absorption Characterization of Semiconductors – Photonic Materials

This review describes interaction between matter and photon. The study of optical properties of these semiconductors gives a good understanding of their electronic properties and band structures. The optical band gaps of semiconducting materials play an important role in deciding the photoelectric properties of the optoelectronic devices. Thus, it is always interesting to investigate the nature of transport of carriers in a semiconducting material. Working of UV VIS NIR Spectrophotometer with diagram is described. Basic formulae regarding direct and indirect transitions are mentioned and explained with proper way. For determination of band gap for semiconducting materials, absorption of incident photon by semiconducting material is an important technique.