Acta Physica Sinica, Volume. 69, Issue 10, 108102-1(2020)
Gallium oxide (Ga2O3) nanomaterials have great potential in the fields of ultraviolet transparent electrodes, high-temperature gas sensors, solar blind ultraviolet detectors and power devices, while achieving Ga2O3 nanomaterials with high crystalline quality and controllable size and morphology still remains challenge. Herein, size-controllable Gallium oxide hydroxide (GaOOH) nanorods, nanorod bundles, and spindles were prepared by hydrothermal method. After high temperature calcination, GaOOH nanomaterials were successfully transformed into higher-quality single-crystal β-Ga2O3 nanomaterials which well retained the morphological characteristics of the pristine GaOOH.With the help of X-ray diffraction (XRD), Raman scattering spectroscopy (Raman) and field emission scanning electron microscope (FE-SEM), we systematically studied the influence of the pH value and the concentration of anionic surfactants in the precursor solution on the crystal structure and surface morphology of GaOOH and β-Ga2O3 nanomaterials, and explored the different growth mechanism of GaOOH nanomaterials under different conditions. Simultaneously, room temperature photoluminescence (PL) tests revealed that β-Ga2O3 nanomaterials with different morphologies exhibit typical broad blue-green emission and sharp red emission, which are closely related to the existence of intrinsic defects in nanomaterials.The above research results provide valuable information for the controllable preparation of high-quality β-Ga2O3 nanomaterials.
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Teng-Yu Ma, Wan-Jun Li, Xian-Wang He, Hui Hu, Li-Juan Huang, Hong Zhang, Yuan-Qiang Xiong, Hong-Lin Li, Li-Juan Ye, Chun-Yang Kong.
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Received: Jan. 24, 2020
Accepted: --
Published Online: Nov. 30, 2020
The Author Email: Zhang Hong (zhh_2016@163.com)