1- n-2 x-y Ba n Mg 2(PO 4) 2: xCe 3+, yEu 2+, xNa + phosphors for optical temperature sensing]]>

摘要

AbstractTo develop novel phosphors for optical temperature sensors, a series of Sr1-n-2x-yBanMg2(PO4)2:xEu2+,yCe3+,yNa+(SBnMP:xEu2+,yCe3+, 0.0015?≤?x?≤?0.0075, 0?≤?y?≤?0.015, 0?≤?n?≤?0.5) phosphors were designed, and their photoluminescence properties were investigated. For Eu2+single-doped SMP phosphors, broad emission bands around 411?nm are obtained upon 365?nm excitation. However, when the Ba2+ions are introduced into the SMP:Eu2+, a new Eu2+emission band at 388?nm appears and the dominant emission peak has shifted gradually from 411 to 388?nm with the Ba2+concentration changing from 0 to 40?mol%. For Ce3+single-doped SMP and SB0.35MP phosphors, most of the emission bands are located in the near-UV region. By codoping Eu2+-Ce3+into the SMP and SB0.35MP hosts, an efficient energy transfer (ET) from Ce3+to Eu2+occurs, and the ET efficiency has been calculated by using the decay lifetimes of Ce3+. The investigation of the thermal stability luminescence reveals that the emission intensities of Ce3+and Eu2+single-doped samples exhibit an opposite changing tend with increasing temperature. Thus, the intensity ratio of the Ce3+to Eu2+emissions will demonstrate obvious change regulation with temperature when the Ce3+-Eu2+ions are codoped into the SBnMP, which could be used for the temperature sensor. Moreover, it has been found that the present phosphors could show high sensitivity.Highlights?Tunable-emission has been obtained in the SBnMP:Ce3+,Eu2+phosphors.?The SBnMP:Ce3+,Eu2+could supply a potential technique for temperature measurement.?The SBnMP:Ce展开▼