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Title: Hydrogen-related complexes in Li-diffused ZnO single crystals

Zinc oxide (ZnO) is a wide band gap semiconductor and a potential candidate for next generation white solid state lighting applications. In this work, hydrogen-related complexes in lithium diffused ZnO single crystals were studied. In addition to the well-known Li-OH complex, several other hydrogen defects were observed. When a mixture of Li 2O and ZnO is used as the dopant source, zinc vacancies are suppressed and the bulk Li concentration is very high (>10 19 cm -3). In that case, the predominant hydrogen complex has a vibrational frequency of 3677 cm -1, attributed to surface O-H species. When Li 2CO 3 is used, a structured blue luminescence band and O-H mode at 3327 cm -1 are observed at 10K. These observations, along with positron annihilation measurements, suggest a zinc vacancy–hydrogen complex, with an acceptor level 0.3 eV above the valence-band maximum. In conclusion, this relatively shallow acceptor could be beneficial for p-type ZnO.
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  1. Washington State Univ., Pullman, WA (United States)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 3; Journal ID: ISSN 0021-8979
American Institute of Physics (AIP)
Research Org:
Washington State Univ., Pullman, WA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
36 MATERIALS SCIENCE; zinc; II-VI semiconductors; doping; vacancies; photoluminescence
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1267528