Transport and Recombination

This lecture covers the transport and recombination mechanisms in crystalline and disordered semiconductors, including charge transport, generation, and recombination processes. It discusses drift and diffusion conductivities, trapping mechanisms, and various recombination channels such as Auger, bi-molecular, and geminate recombination. The instructor explains the concepts of photoconductivity, recombination in low and high mobility semiconductors, and the role of traps and recombination centers. Different recombination models like Shockley-Read-Hall (SRH) and their applications in crystalline and disordered semiconductors are also explored. The lecture delves into the influence of defects, impurities, and doping on recombination, as well as the characterization techniques for studying recombination and photoconductivity.