Progress of Theoretical Research on the Related Scientific Problems of NEA GaN Photocathode

In order to deeply analyze the emission mechanism of NEA(Negative electron affinity) GaN photocathode, further improve its performance, design and demonstrate the key parameters of the solar-blind ultraviolet AlGaN photocathode, this paper summarizes the application and calculation results of first-principles calculation in the above research.The importance of the combination about theoretical calculation and experimental results in the research is expounded, and the application of this method in future research is prospected.