title: [Near-infrared photoluminescence properties of natural sodalite activated with Mn and Fe transition metal ions doping].
abstract: Na8Al6Si6O24Cl2 : Mn and Na8Al6Si6O24Cl2 : Fe NIR phosphors were prepared by a solid-solid reaction at high temperature. Their crystal structures of fluorescent powder were investigated by using X-ray powder diffraction (XRD), and their NIR emission spectrum and excitation spectrum were measured at room temperature. The main emission peak of Mn5+ in the Na8Al6Si6O24Cl2 : Mn phosphor was observed at 1 200 nm in the NIR spectral region under 400 or 602 nm excitation, attributing to the 3A2-3T2 and 3A2-1E transitions of Mn5+ ions. The characteristic NIR luminescence of Mn5+ in sodalite is greatly enhanced by co-doping manganese and sulfur. A mechanism of the energy transfer between S2(-) and Mn5+ was also proposed here. The main emission peak of Fe2+ ions in the Na8Al6Si6O24Cl2 : Fe phosphor was recorded at 1 000 nm in the NIR region under the excitation of 334 or 500 nm. This photoluminescence originated from the 3T1-5 E transition of Fe2+. Such an emission in the NIR region suggests a potential application in improving solar spectrum to enhance the efficiency of silicon solar cells.
authors.affiliation: Key Laboratory of Mineral Luminescent Material and Microstructure of Xinjiang, Xinjiang Normal University, Urumqi 830054, China. 1462934403@qq.com
authors.forename: Tuerxun
authors.initials: T
authors.lastname: Aidilibike
authors.affiliation: Xinjiang Yili Normal College, Yining 835000, China.
authors.forename: Bahetiguli
authors.initials: B
authors.lastname: Asilibieke
authors.affiliation: Key Laboratory of Mineral Luminescent Material and Microstructure of Xinjiang, Xinjiang Normal University, Urumqi 830054, China.
authors.forename: Aierken
authors.initials: A
authors.lastname: Sidike