Samarium doped apatite-type orange-red emitting phosphor Ca5（PO4）2SiO4 with satisfactory thermal properties for n-UV w-LEDs

作     者：Ze Zhang Jialiang Niu Wei Zhou Dingdian Xu Huanhuan Du 

作者机构：Department of ChemistrySchool of ScienceBeijing Technology and Business University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2019年第37卷第9期

页      面：949-954,I0002页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0806[工学-冶金工程] 08[工学] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：supported by the Research Foundation for Youth Scholars of Beijing Technology and Business University (QNJJ2019-06 PXM2019_014213_000007) 

主　　题：Phosphors Ca5(PO4)2SiO4:Sm^3+ Luminescence Orange-red phosphor Rare earths 

摘      要：A novel single-phase Sm^3+activated Ca5(PO4)2SiO4 phosphor was successfully fabricated via a conventional solid-state method,which can be e fficie ntly excited by near ultraviolet(n-UV)light-emitting *** crystal structure and luminescence properties were characterized and analyzed systematically by using relevant *** Ca5(PO4)2SiO4:Sm^3+phosphor shows an orange-red emission peaking at600 nm under the excitation of 403 nm and the optimal doping concentration of Sm^3+is determined to be 0.08,The critical distance of Ca5(PO4)2SiO4:0.08 Sm^3+is calculated to be 1.849 nm and concentration quenching mechanism of the Sm^3+in Ca5(PO4)2SiO4 host is ascribed to energy transfer between nearestneighbor *** decay time of Ca5(PO4)2 SiO4:0,08 Sm^3+is determined to be 1.1957 *** addition,the effect of temperature on the emission intensity was also studied,72.4%of the initial intensity is still preserved at 250℃,better thermal stability compared to commercial phosphor YAG:Ce^3+indicates that Ca5(PO4)2SiO4:0.08 Sm^3+has excellent thermal stability and active energy is deduced to be 0.130 *** the results demonstrate that orange-red emitting Ca5(PO4)2SiO4:0.08 Sm3+phosphor exhibits good luminescent *** to the excellent thermal quenching luminescence property,Ca5(PO4)2SiO4:0.08 Sm^3+phosphor can be applied in n-UV white light emitting diodes and serve as the warm part of white light.