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VOLUME 50 (1989) | ISSUE 3 | PAGE 113
Picosecond kinetics of emission by surface excitons in ZnO
It is shown, for the first time, that a substantial fraction of the exciton luminescence of ZnO crystals is due to excitons trapped by surface centers. It is suggested that the anomalously short lifetimes (~ 60 ps) observed for the surface excitons are a consequence of Auger processes.