The Electron Voltaic Effects in Silicon and Selenium Elements

The electron and photovoltaic effects in silicon and selenium elements are studied experimentally. It is shown that the response to cathode rays is closely related to their penetration into the cells, and indicates data such as the depth of the barrier and the diffusion length of minority carriers. In particular, it is shown that electrons in grey selenium are mobile, with a diffusion length of about 8 microns. A brief description is given of some fatigue effects encountered.