Influence of Oxygen Pressure on Structural and Sensing Properties of β-Ga2O3 Nanomaterial by Thermal Evaporation
MA Hai-Lin1,2, FAN Duo-Wang1,2
1National Engineering Research Center of Green Coating Technology and Equipment, Lanzhou Jiaotong University, Lanzhou 7300702MOE Key Lab of Opto-electronic Technology and Intelligence Control, Lanzhou Jiaotong University, Lanzhou 730070
Influence of Oxygen Pressure on Structural and Sensing Properties of β-Ga2O3 Nanomaterial by Thermal Evaporation
MA Hai-Lin1,2, FAN Duo-Wang1,2
1National Engineering Research Center of Green Coating Technology and Equipment, Lanzhou Jiaotong University, Lanzhou 7300702MOE Key Lab of Opto-electronic Technology and Intelligence Control, Lanzhou Jiaotong University, Lanzhou 730070
摘要We prepare the gallium oxide (β-Ga2O3) nanomaterials from gallium and oxygen by thermal evaporation in the argon atmosphere and research their oxygen sensing under UV illumination with different oxygen pressures. X-ray diffraction reveals that the synthesized product is monoclinic gallium oxide, it is further confirmed by electron diffraction of transmission electron microscope, and its morphology through the observation using scanning electron microscope reveals that β-Ga2O3 nanobelts with a breadth less than 100nm and length of several micrometers are synthesized under low oxygen pressure, while the nano/microbelts are synthesized under high oxygen pressure. Room-temperature oxygen sensing is tested under at 254nm illumination and it is found that the current decreases quickly first and then slowly with oxygen pressure from low to high.
Abstract：We prepare the gallium oxide (β-Ga2O3) nanomaterials from gallium and oxygen by thermal evaporation in the argon atmosphere and research their oxygen sensing under UV illumination with different oxygen pressures. X-ray diffraction reveals that the synthesized product is monoclinic gallium oxide, it is further confirmed by electron diffraction of transmission electron microscope, and its morphology through the observation using scanning electron microscope reveals that β-Ga2O3 nanobelts with a breadth less than 100nm and length of several micrometers are synthesized under low oxygen pressure, while the nano/microbelts are synthesized under high oxygen pressure. Room-temperature oxygen sensing is tested under at 254nm illumination and it is found that the current decreases quickly first and then slowly with oxygen pressure from low to high.
(Charge carriers: generation, recombination, lifetime, trapping, mean free paths)
引用本文:
MA Hai-Lin;FAN Duo-Wang;. Influence of Oxygen Pressure on Structural and Sensing Properties of β-Ga2O3 Nanomaterial by Thermal Evaporation[J]. 中国物理快报, 2009, 26(11): 117302-117302.
MA Hai-Lin, FAN Duo-Wang,. Influence of Oxygen Pressure on Structural and Sensing Properties of β-Ga2O3 Nanomaterial by Thermal Evaporation. Chin. Phys. Lett., 2009, 26(11): 117302-117302.
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