Timorese Academic Journal of Science and Technology
Volume 2, September 2019, Pages 1-134
ISSN : 2617 - 4944 (Print) ISSN : 2617 - 4952 (Online)
ISSN : 2617 - 4944 (Print) ISSN : 2617 - 4952 (Online)
What are Transparent Conducting Oxides? -Study on Electron Spin Resonance-
Author(s):
Mitsuo Yamaga,
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Abstract: Transparent conducting oxides (TCOs) have high transparency in the visible range and high electrical conductivity. Both properties are performed by free carrier densities of ~1019 cm-3 in TCOs, being three orders of magnitude smaller than those in metals. Insulator-to-metal transition in semiconductors has been discussed using the variable-range hopping model. Hopping process of free carriers in pure and Si-doped β- Ga2O3 single crystals is derived from the temperature dependence of the electron-spin resonance (ESR) line ascribed to the conduction electrons.
Keywords: transparent conducting oxides, gallium oxide, electron spin resonance