摘要
在空气中900℃温度下,将纯天然无水芒硝(Na2SO4)和MnCl2的混合粉末900℃加热20 min后,迅速骤冷至室温制备了Na2SO4∶Mn发光材料,并测量了其在室温中真空紫外光激发下的光致发光谱。实验结果表明,在172 nm激发下的发射光谱由峰值位于在592 nm处的宽带谱构成,所得到的宽带谱归属于Mn2+的3d电子组态内4T1→6A1的辐射跃迁。红色发光监测得到的激发光谱分为两类:峰值位于165,233 nm处的基质吸收带和位于191,275 nm处的Mn2+的吸收带。MnCl2掺杂的质量分数在0.1%~0.4%范围内,随着Mn掺杂量的增加,Mn激活无水芒硝(Na2SO4∶Mn)的发射光谱强度相应增强,质量分数达到0.3%后出现浓度猝灭现象。
Na2SO4∶Mn phosphors were prepared by heating pure natural thenardite with MnCl2 at 900 ℃ for 20 min in air.Their photoluminescence(PL) spectra were investigated under vacuum ultraviolet(VUV) at room temperature.The results show the emission spectrum under 172 nm excitation consists of a broad band with a peak at 592 nm,which can be attributed to the 4T1→6A1 transition in the 3d shell of Mn2+.The excitation spectrum obtained by monitoring the red luminescence divides into two parts: absorption bands of Mn2+(191 nm and 275 nm) and host absorption bands(165 nm and 233 nm).The relative emission efficiency increase with the mass fraction of MnCl2 in 0.1%~0.4% range,and the concentration quenching occurs at 0.3% Mn contents.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2011年第3期241-244,共4页
Chinese Journal of Luminescence
基金
国家自然科学基金(10964013)
新疆维吾尔自治区自然科学基金(2009211A09)
新疆师范大学研究生科技创新基金(20101204)资助项目