Recombination in Semiconductors

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Access provided by: anon Sign Out. For electron capture two electrons in the conduction band and one hole in the valence band are necessary. This energy is often in the form of thermal vibrations known as phonons, which are then absorbed into the material which results in heating. What could be a potential cause for this reduced efficiency, and what is one practical solution to this problem? Gallium nitride LEDs can be manufactured to produce light with colors ranging from the low end of visible up to ultraviolet. The derivation for donor traps, which are neutral when occupied by an electron and positively charged when empty, is similar and delivers the same result. In recent years, great progress has been made in the understanding of recombination processes controlling the number of excess free carriers in semiconductors under nonequilibrium conditions.