Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
Volume 60, Issue 3, Pages 307-310Publisher
KOREAN PHYSICAL SOC
DOI: 10.3938/jkps.60.307
Keywords
ZnO film; Hydrogen; Ion irradiation; Hall mobility; Electronic structure
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Funding
- Dankook University
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RF-sputtered ZnO films were irradiated with hydrogen ions by using an ion accelerator at 110 keV. The physical and the electrical characteristics of the irradiated ZnO films were studied as functions of the hydrogen-ion irradiation dose. The Hall measurement indicated that the carrier concentration had small changes regardless of irradiated hydrogen amount, but the mobility was dramatically enhanced after irradiation of 10(15) atoms/cm(2). Even when the irradiated hydrogen dose was increased, the crystalline structure had no transformation and the composition was preserved. On the other hand, the electronic structure, measured by using X-ray absorption spectroscopy, exhibited a modification of the molecular orbital structure in the ZnO films irradiated at doses above 10(15) atoms/cm(2). These distortions of the molecular orbital in the conduction band could lead to a mobility enhancement without a structural transformation.
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