Since negative electron affinity (NEA), which enables electrons to escape from the surface easily, has been detected on the surface of AlN thin films, AlN should be a good electron emitting material.

• 并且AlN作为一种宽带隙材料，它有很多独特的性质，已经证明其具有表面负电子亲和势（NEA），能够使电子易于逸出表面，是很好的电子场发射材料。