The spectral characteristics of native defects in the crystalline lattice of c-BN were studied. It was found that the photoluminescence spectrum, under exposure to ultraviolet-blue light, had a complex structure which contained a predominant wide 2.5eV luminescence band at room temperature. The photo-stimulated luminescence consisted of a band which coincided with the 2.5eV photoluminescence. It was concluded that the same defects were responsible for both photoluminescence and photo-stimulated luminescence.

Spectral Characteristics of Native Defects in BN. B.Berzina, L.Trinkler, K.Atobe: Physica Status Solidi C, 2003, 0[1], 421-4