固溶体结构对Ca_(2-x)Sr_xZn_4Ti_(15)O_(36)∶Pr^(3+)发光性质的影响  

Effects of Solid Solution Structures on Luminescence of Ca_(2-x)Sr_xZn_4Ti_(15)O_(36)∶Pr^(3+)

作　　者：廉世勋[1] 李秀英[1] 尹笃林[1] 李承志[1] 朱爱玲[1] 

机构地区：[1]湖南师范大学化学化工学院化学生物学及中药分析省部共建教育部重点实验室,长沙410081

出　　处：《无机化学学报》2006年第2期336-340,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.20371017)

摘　　要：Ca2-xSrxZn4Ti15O36∶Pr red long decay phosphor was synthesized by high temperature solid state reaction. Photoluminescence property and crystalline and unit cell parameters of the orthorhombic were investigated by fluorescence spectrophotometer and by powder X-ray diffraction, respectively. The emission intensity at 618 nm changes sharply when the concentration of Sr2+ （x） is less than 0.1 and the emission intensity reaches the maximum when x is equal to 0.007. There is an obviously broad excitation band at 270 nm when x is equal to 0.003 and it disappears gradually when x is over 0.01. The unit cell a parameter of Ca2-xSrxZn4Ti15O36∶Pr decreases while c parameter increases with the increases of the concentration of the doped Sr2+. When x is over 0.1 the value of the unit cell parameters a and c become stable. TL peaks of Ca2Zn4Ti15O36∶Pr, Ca1.993Sr0.007Zn4Ti15O36∶0.002Pr3+, 0.002Na+, are located at 62 ℃, 88 ℃, respectively, which indicates that there are deeper traps in Ca1.993Sr0.007Zn4 Ti15O36∶0.002Pr3+, 0.002Na+.Ca2-xSrxZn4Ti15O36：Pr red long decay phosphor was synthesized by high temperature solid state reaction. Photoluminescence property and crystalline and unit cell parameters of the orthorhombic were investigated by fluorescence spectrophotometer and by powder X-ray diffraction, respectively. The emission intensity at 618 nm changes sharply when the concentration of Sr^2＋ （x） is less than 0.1 and the emission intensity reaches the maximum when x is equal to 0.007. There is an obviously broad excitation band at 270 nm when x is equal to 0.003 and it disappears gradually when x is over 0.01. The unit cell a parameter of Ca2-xSrxZn4Ti15O36：Pr decreases while c parameter increases with the increases of the concentration of the doped Sr^2＋. When x is over 0.1 the value of the unit cell parameters a and c become stable. TL peaks of Ca2Zn4Ti16O36：Pr, Ca1.993Sr0.007Zn4Ti15O36：0.002Pr^3＋, 0.002Na^＋, are located at 62 ℃, 88 ℃, respectively, which indicates that there are deeper traps in Ca1.993Sr0.007Zn4 Ti15O36：0.002Pr^3＋, 0.002Na^＋.

关 键 词：Ca2-xSrxZn4Ti15O36 50%固溶体 PR^3+离子 红色发光 

分 类 号：O614.33[理学—无机化学] O482.3[理学—化学]