Near-infrared Photoluminescence Properties of Natural Sodalite
天然方钠石的近红外发光特性

A near-infrared emitting natural sodalite was fabricated by using a high temperature solid state reaction method. The X-ray diffraction (XRD) of the fluorescent powder and its near-infrared emission spectrum and excitation spectrum at room temperature were determined. Excited by the visible light at the wavelength of 600 nm, the Mn5 ion (3A2-1E transition) in the natural sodalite powder emitted the near-infrared spectrum which had its main emission peak at the wavelength of 1200 nm. At the excitation of the visible light at the wavelength of 500 nm, the Fe2 ion (3T1-5E) in the powder emitted the near-infrared spectrum which had its main emission peak at the wavelength of 1000 nm. The finding of this phenomenon was of positive significance to the improvement of the efficiency of silicon solar cells.