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

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4959106· OSTI ID:1325779

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 Li2O and ZnO is used as the dopant source, zinc vacancies are suppressed and the bulk Li concentration is very high (>1019 cm-3). In that case, the predominant hydrogen complex has a vibrational frequency of 3677 cm-1, attributed to surface O-H species. When Li2CO3 is used, a structured blue luminescence band and O H mode at 3327 cm-1 are observed at 10 K. 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. This relatively shallow acceptor could be beneficial for p-type ZnO.

Research Organization:
Washington State Univ., Pullman, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
FG02-07ER46386
OSTI ID:
1325779
Alternate ID(s):
OSTI ID: 1267528; OSTI ID: 1489138
Journal Information:
Journal of Applied Physics, Vol. 120, Issue 3; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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3D micro-structured arrays of ZnΟ nanorods journal May 2017

Figures / Tables (8)


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