The role of surface oxygen vacancies in the optical properties of tin dioxide

nanobelts was investigated. Using a first-principles approach, based on the density

functional theory, combined with a very accurate exchange correlation functional,

the SnO2 nanobelt largest surface, (101), was characterized. It was shown that the

presence of surface oxygen vacancies led to the appearance of occupied states

located at about 1eV above the valence band and to unoccupied states lying in

resonance with the conduction band. Photoluminescence characterization,

performed on samples of SnO2 nanobelt at low temperatures, showed that the basic

spectral features of luminescence were in excellent agreement with theoretical

predictions.

Role of Surface Oxygen Vacancies in Photoluminescence of Tin Dioxide Nanobelts.

F.Trani, M.Causà, S.Lettieri, A.Setaro, D.Ninno, V.Barone, P.Maddalena:

Microelectronics Journal, 2009, 40[2], 236-8