Taximaiti Yusufu, Ajimu Abulai, Su Zong-Cai, Aierken Sidike
School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Aug;31(8):2063-6.
Na2SO4: Dy3+ phosphors were prepared by heating pure natural thenardite (Na2SO4) with DyF3 at 900 degrees C for 25 min in air studied the Luminescence properties of Na2SO4: Dy3+ were studied by synchrotron radiation. Their photoluminescence (PL) spectra were also investigated under vacuum ultraviolet-ultraviolet (VUV-UV) at room temperature. According to the emission spectra, the yellow-blue ratio (Y/B) is different under different concentrations of Dy3+ and the position of excitation. And the excitation spectrum is consisted of strong bands assigned to the 4f9-->4f8 5d transition at 172 nm, the O(2-)- Tm3+ charge transfer band at 165 nm and weak bands assigned to host absorption (138, 245 nm) and the 6 H15/2-->4D7/2, 6H15/2-->6P3/2, and 6H15/2-->6P7/2 transition at 299, 325 and 351 nm respectively.
通过在空气中将纯天然芒硝（Na₂SO₄）与DyF₃在900℃下加热25分钟制备了Na₂SO₄:Dy³⁺荧光粉，利用同步辐射研究了Na₂SO₄:Dy³⁺的发光特性。还在室温下的真空紫外-紫外（VUV-UV）条件下研究了它们的光致发光（PL）光谱。根据发射光谱，在不同浓度的Dy³⁺和激发位置下，黄蓝比（Y/B）不同。激发光谱由172nm处归属于4f⁹→4f⁸5d跃迁的强带、165nm处的O(2⁻)-Tm³⁺电荷转移带以及归属于基质吸收（138、245nm）和分别在299、325和351nm处的⁶H₁₅/₂→⁴D₇/₂、⁶H₁₅/₂→⁶P₃/₂和⁶H₁₅/₂→⁶P₇/₂跃迁的弱带组成。
