Hydrogen-related complexes in Li-diffused ZnO single crystals
- Washington State Univ., Pullman, WA (United States)
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
Web of Science
3D micro-structured arrays of ZnΟ nanorods
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journal | May 2017 |
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