研究目的
To obtain gallium oxide crystals with high photosensitivity and study the spectral dependence of photoconductivity (PC) in the range of 230–800 nm in unpolarized and polarized light, as well as to create a dual-channel UV photodetector with photosensitivity bands of 230–250 and 250–270 nm using a β-Ga2O3 crystal and a polarizer.
研究成果
Photosensitive single crystals of β-Ga2O3 have been obtained and their photoconductivity spectra investigated, revealing high photosensitivity in the UV region and significant anisotropy. This anisotropy was utilized to fabricate a selective two-channel UV detector for specific spectral ranges.
研究不足
The study acknowledges the need for further research to explain the nature of anisotropy of the optical and photoconductive properties of gallium oxide, suggesting that the current understanding may not fully account for all observed phenomena.
1：Experimental Design and Method Selection:
The study involved the investigation of photoconductivity (PC) of β-Ga2O3 single crystals in the UV region, utilizing polarized light to observe anisotropy effects.
2：Sample Selection and Data Sources:
Unintentionally doped (UID) β-Ga2O3 single crystals grown by the optical floating zone method were used. High-temperature treatment in erbium oxide was applied to enhance photosensitivity.
3：List of Experimental Equipment and Materials:
Equipment included a deuterium lamp for UV excitation, a xenon lamp for visible light excitation, a monochromator, and a Glaz's prism for light polarization.
4：Experimental Procedures and Operational Workflow:
Photoconductivity spectra were recorded in polarized light for different orientations of the electric vector relative to the crystal's b axis.
5：Data Analysis Methods:
The photoconductivity spectra were normalized to the same amount of incident light quanta for comparison.
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