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bandgap

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bandgap
In a material, the energy difference between its non-conductive state and its conductive state. There is virtually no bandgap in most metals, but a very large one in an insulator (dielectric). In a semiconductor, the bandgap is small. Technically, the bandgap is the energy it takes to move electrons from the valence band to the conduction band.


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The bandgap of a material is the energy difference between electrons residing in the two most important states of a material-valence band states and conduction band states.
It describes a range of optical and photonic devices, including MEMS optical switches, bandgap crystal switches, optical variable attenuators, and injection locked tunable lasers.
INTRODUCTION Wide bandgap (WBG) semiconductor devices, which are based on silicone carbide (SiC), gallium nitride (GaN), diamond (C) and semi-wide-gap semiconductor material gallium arsenide (GaAs) as well, demonstrate promising properties under extreme conditions, such as high power, high temperature and high frequency.
 
 
 
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