Luminescence and energy transfer of Sm3+ and Eu3+ in Ca2PO4Cl

作者：Wang Zhijun^*; Li Panlai; Yang Zhiping; Guo Qinglin

来源：Journal of Luminescence, 2014, 151: 170-175.

DOI：10.1016/j.jlumin.2014.02.030

• Luminescence
• Energy transfer
• Sm3+-Eu3+
• (CaPOCl)-P-2-Cl-4

Sm3+, Eu3+, and Sm3+-Eu3+ doped Ca2PO4Cl phosphors are synthesized by a solid-state method. Ca2PO4Cl: Sm3+ can produce red emission under the 400 nm radiation excitation, and the emission peak is located at 601 nm, which is assigned to the (4)G(5/2 ->)(6)H(7/2) transition of Sm3+. Ca2PO4Cl:Eu3+ can create red emission under the 392 nm radiation excitation, and the strongest peak is located at 620 nm, which is attributed to the D-5(0)-F-7(2) transition of Eu3+. The energy transfer from Sm3+ to Eu3+ in Ca2PO4Cl has been validated and the critical distance (Re) of Sm3+ to Eu3+ in Ca2PO4Cl is calculated to be 1.14 nm. With increasing Eu3+ doping concentration, the energy transfer efficiency (Sm3+ -> Eu3+) gradually increases to 53.7%. The luminescence property of Ca2PO4Cl:Sm3+, Eu3+ can be tuned by properly tuning the relative ratio of Sm3+-Eu3+, and the emission intensity of Ca2PO4Cl:Eu3+ can be greatly enhanced by codoped Sm3+.

• 出版日期2014-7
• 单位河北大学