Abstract
AbstractThe annealing behavior of the center in ZnO, which leads to a local vibrational mode at , has been studied. Infrared absorption measurements confirm the previous findings that the center dissociates already at temperatures higher than about 500C and an apparent stability up to 1250C is due to efficient retrapping of H by Li. Secondary ion mass spectrometry data indicate that Fe impurities prevent a reformation of after dissociation. The formation of Fe −Li complexes is proposed as a prevailing mechanism for this behavior.
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