Luminescence Properties of Thenardite Activated with Tm3+ under Vacuum Ultraviolet Excitation
Taximaiti Yusufu1, Ajimu Abulai1, Keyoumu Niyazi2, SU Zong-cai1, Aierken Sidike1*
1. Department of Physics, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China 2. Xinjiang Geology and Mineral Museum, Urumqi 830000, China
Abstract：The Na2SO4∶Tm3+ phosphor was synthesized by the high temperature solid state reaction method in air. The crystalline structure was examined by X-ray diffraction (XRD). Narrow bands observed in emission spectra were well identified with the electronic transitions within the 4f12 configurations of Tm3+, and the excitation spectrum is consisted of strong bands assigned to the 4f12→4f115d transition at 183 nm, the O2--Tm3+ charge transfer band at 170 nm and weak bands assigned to host absorption (130, 223 and 258 nm). In addition, the authors also found that the content of Tm3+ in the 8～16 mg concentration range caused quenching.
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