Hydrogen in ZnO

E. V. Lavrov

doi:10.1117/12.846018

15 February 2010 Hydrogen in ZnO

E. V. Lavrov

Proceedings Volume 7603, Oxide-based Materials and Devices; 76030J (2010) https://doi.org/10.1117/12.846018
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

The results of a combined study of Raman scattering, IR absorption, photoluminescence, and photoconductivity on ZnO are presented. Two shallow donors - hydrogen at the bond-centered lattice site, H_BC, and hydrogen bound in an oxygen vacancy, H_O, - were identified. Donor H_BC has an ionization energy of 53 meV. The recombination of an exciton bound to H_BC gives rise to the 3360.1±0.2 meV photoluminescence line. The 1s → 2p donor transition at 330 cm^-1 is detected in the Raman scattering and photoconductivity spectra. The stretch mode of the associated O-H bond is detected in IR absorption at 3611 cm^-1. The H_O donor in ZnO has an ionization energy of 47 meV. The excitonic recombination at H_O leads to the previously labeled I₄ line at 3362.8 meV. Photoconductivity and Raman spectra reveal the 1s → 2p donor transition at 265 cm^-1. It is shown that H_BC migrating through the ZnO lattice forms electrically inactive interstitial H₂. Vibrational modes of H₂, HD, and D₂ were identified at 4145, 3628, and 2985 cm^-1, respectively. These results suggest that interstitial H₂ is responsible for the "hidden" hydrogen in ZnO.

Citation Download Citation

E. V. Lavrov "Hydrogen in ZnO", Proc. SPIE 7603, Oxide-based Materials and Devices, 76030J (15 February 2010); https://doi.org/10.1117/12.846018

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