Optical absorption of hexagonal boron nitride involving nitrogen vacancies and their complexes

Defect-induced blue luminescence of hexagonal boron nitride

“…Nevertheless, in agreement with the data of scientific literature [23,28] and present results, it is possible to relate the native defects responsible for the BL in hBN to nitrogen vacancy-type structures, including the F-centers.…”

Defect states in hexagonal boron nitride: Assignments of observed properties and prediction of properties relevant to quantum computation

“…They are important as they can act as activation, recombination, absorption, or photosensitivity centres [23,25,26,50]. In experiments, they have been observed to display 10-line EPR spectra [19][20][21][22][23][24] ; and this with a carbon atom replacing the nitrogen, named C N .…”

Photoluminescence of hexagonal boron nitride: Effect of surface oxidation under UV-laser irradiation

“…Optical properties of h-BN are known to be strongly affected by nitrogen vacancies, which serve as activation, recombination, absorption, and photosensitivity centers. Because of the oxygen healing effect and the energetic position blue-shifted with respect to the transition (A-S c ) of bulk nitrogen vacancy [11], we assign the fluorescence band V to the surface nitrogen vacancies V N free of adsorbed oxygen molecules.…”

“…Keeping in mind the above assignment of the V N surface centers, we associate the deep levels responsible for the luminescent band D with nitrogen multiple vacancies m-V N . According to Ref [11],. both 2-V N and 3-V N vacancies show electronic transitions in the UV spectral range of $3 eV.…”