摘要
采用高温固相反应法制备了Sr_(1-x)Ca_xSi_2O_2N_2∶Eu^(2+)系列荧光粉,研究Y^(3+)离子掺入对荧光粉发光性能的影响。对于Sr Si_2O_2N_2∶Eu^(2+),Y^(3+)离子掺入主要起到稳定Eu^(2+)价态的作用,避免Eu^(2+)氧化为Eu^(3+),从而提高Sr Si_2O_2N_2∶Eu^(2+)的发光性能。对于Ca Sr Si_2O_2N_2∶Eu^(2+),Y^(3+)离子掺入除了稳定Eu^(2+)价态作用外,还能有效减小Eu^(2+)取代Ca^(2+)后晶格膨胀引起的应力,提高Eu^(2+)在晶格中的溶解度。Sr_(1-x)Ca_xSi_2O_2N_2∶Eu^(2+)(x=0,0.15,0.3,0.6,0.75,0.95)系列荧光粉中随着Ca含量的增加,共掺Y^(3+)离子对样品发光强度的提高程度也随之增加(20%~80%)。
Sr_（1-x）Ca_xSi_2O_2N_2∶Eu^2＋/Y^3＋（ x = 0,0. 15,0. 3,0. 6,0. 75,0. 95） phosphors were prepared by a high temperature solid-state reaction method. The effect of Y^3＋doping on the luminescence properties of the samples was studied. The results revealed that Y^3＋ion doping may significantly improve the photoluminescence properties of MSi2O2N2∶ Eu^2＋（ M = Ca,Sr） because the point defect result from the substitution of Y^3＋ions for M^2＋could inhibit the oxidization of Eu^2＋to Eu^3＋.Besides,The Y^3＋ion has smaller radius which could relax the expansion caused by the larger Eu^2＋in CaSi2O2 N2∶ Eu^2＋. The structure of Sr1-xCaxSi2O2N2∶Eu^2＋/Y^3＋ can solve more Eu^2＋ions at an equal distortion degree. With the increasing of x values in Sr1-xCaxSi2O2N2∶Eu^2＋,the luminescence intension ratio of Sr1-xCaxSi2O2N2∶Eu^2＋/Y^3＋（ B1-B6） to Sr1-xCaxSi2O2N2∶Eu^2＋（ A1-A6） raises（ 120% - 180%）.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2017年第11期1450-1456,共7页
Chinese Journal of Luminescence
基金
国家然科学基金(51462003
61361012)
贵州省自然科学基金(黔科合J字LKM[2011]15号)资助项目~~
