Structural and Photoluminescence Properties of β-Ga₂O₃ Nanofibres Fabricated by Electrospinning Method

We have prepared the β-Ga₂O₃ nanofibres by electrospinning method followed by calcining in air at 900°C. The morphology and structure of the nanofibres are characterized by field emission scanning electron microscopy (FE-SEM), x-ray diffraction (XRD) and Raman technique. These nanofibres have diameters ranging from 60 to 130nm and lengths up to several millimetres. Photoluminescence (PL) spectrum under excitation at 325nm shows that these β-Ga₂O₃ nanofibres have a blue emission peaking at 466nm, which may be attributed to defects such as the oxygen vacancies, gallium vacancies and gallium-oxygen vacancy pairs.