期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.185502
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Hydrogen molecules in ZnO are identified by their local vibrational modes. In a Raman study, interstitial H(2), HD, and D(2) species were found to exhibit local vibrational modes at frequencies 4145, 3628, and 2985 cm(-1), respectively. After thermal treatment of vapor phase grown ZnO samples in hydrogen atmosphere, most hydrogen forms shallow donors at the bond-centered site (H(BC)). Subsequently, H(BC) migrates through the crystal and forms electrically inactive H(2). These results imply that the hidden hydrogen in ZnO [G. A. Shi et al., Appl. Phys. Lett. 85, 5601 (2004)] occurs in the form of interstitial H(2).
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