Vibrational spectroscopy of Na-H complexes in ZnO

Abstract

Sodium acceptors were diffused into ZnO bulk single crystals to a depth of ∼1μm, with a near-surface concentration of ∼1018-cm 3. An O-H local vibrational mode (LVM) was observed at 3304-cm -1, at a temperature of 9 K, in hydrogenated samples. The LVM is attributed to an O-H bond-stretching mode adjacent to a Na acceptor. When deuterium substitutes for hydrogen, a peak is observed at 2466-cm-1. The isotopic frequency ratio is similar to values found in other hydrogen complexes. In the deuterated sample, a sideband at 2461-cm-1 is attributed to a Fermi resonance. © 2013 TMS.