Many photoelectronic imaging devices utilize the phenomenon of photoconductivity to generate an electrical voltage or current signal from the impinging photons. In this chapter, the basic ideas used in interpreting the various photoconductive effects in solids are presented. The treatment is not rigorous, and concepts are introduced using intuitive terminology and clarified as the discussion proceeds. Since an extremely wide variety of photoconductive behavior is observed, it is advantageous from the heuristic point of view to start with simple, idealized situations, and then add complications to build a realistic model for explaining experimental results. The goal of the discussion is to give an introduction to a study of the performance of the target in conventional vidicons, plumbicons, silicon diode arrays, and all-solid-state image sensors.
KeywordsCarrier Density Free Carrier Capture Cross Section Recombination Center Virtual Cathode
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