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This Concept Map, created with IHMC CmapTools, has information related to: Semiconductors, controlling electric current determined by conductions of holes, but not in other using to controlling electric current, holes electric charges generated intrinsic, chemicals Group VI Selenium, p-n Junction biased reverse, direct or reverse, isolators explanation given by the band structure of the electrons energy spectrum, in particular terms using to controlling electric current, R O G V A 5 different LEDs circuit 5 LEDs, different colors ????, conductors and isolators, Selenium used for production of n and p type materials, n and p type materials or extrinsic semiconductors, Silicium and Germanium have regular crystalline (perfect) structures, extrinsical using impurity atoms, holes electric charges generated extrinsical, Semiconductor Materials have electrical resistivity values between the conductors, Semiconductor Materials can lead electricity but not in other, binary compounds of Group III-V GaAs InSb, Semiconductor Materials most used, based on: chemicals, electrons and holes