Abstract
In this paper, the sol-gel method is used to prepare the nano GaN powder. In which we use Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> as the gallium source, citric acid as the chelating agent to prepare the former drive material, after to be jello, we put it into NH <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> environment to get the GaN sample. The two photoluminescence peaks by PL show that GaN has good optical performance, through the first principle calculation we know that the optical performance parameters fit well with the experimental value.
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