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Unformatted text preview: urrent. Photodiodes are basically divided into the following types: • PN photodiodes • PIN photodiodes • Schottky photodiodes • Avalanche photodiodes © Festo Didactic GmbH & Co. KG • FP 1110 191 11. Physical fundamentals PN photodiodes have two differently doped areas in the crystal material, the socalled P-area and N-area, which are separated by a thin barrier layer. (Dotation refers to the process of integrating atoms from other materials, e.g. of boron or gallium into the crystal material. By means of dotation it is possible to influence the conductivity of a semiconductor). With PIN photodiodes the P-area and the N-area is separated by a relatively wide layer of intrinsically conductive semiconductor material (I = intrinsic). This creates a layer of low insulating capacity and a fast switching time of the PIN photodiode. PN silicone photodiodes and PIN silicone photodiodes are the most widely used types of photodiodes. Schottky photodiodes are named after the Schottky effect and renowned for their excellent se...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.

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