摘要
用燃烧法制备了不同Tb3+掺杂量的Y2O2S:Tb3+纳米发光材料,同时用高温固相法制备了不同Tb3+掺杂量的Y2O2S:Tb3+体相材料,X射线晶体衍射结果表明,制备的纳米材料和体相材料均为单一的Y2O2S相.由Debye-Scherre公式估算得到纳米颗粒的平均粒径大约为10 nm.讨论了纳米材料和体相材料Y2O2S:Tb3+中Tb3+的掺杂浓度对荧光性能的影响.激发光谱表明纳米材料的基质吸收带与体相材料相比向高能端移动了6nm,应用久保理论对此进行了定性的解释.
Nanometer materials Y2O2 S： Tb^3＋ with different Tb^3＋ content were prepared by improved combustion synthesis method. Bulk materials were synthesized by traditional high temperature solid state method. X-ray diffraction patterns showed that both the nano and bulk Y2O2S： Tb^3＋ had pure Y2 O2S phases. The average size of the nano-material Y2O2S： Tb^3＋ was 10 nm, which was calculated by Debye-Scherre formula. The effects of Tb^3＋ content on luminescent spectra were studied for both the nano and bulk Y2O2S systems. Compared with the bulk sample, the absorption band of the nano-material shifted to, high energy end about 6 nm. This phenomenon was explained with Kubo theory.
出处
《化学研究》
CAS
2007年第1期12-15,共4页
Chemical Research
关键词
硫氧化钇
铽
纳米材料
燃烧法
蓝移
Y2O2S
terbium
nano-material
combustion method
blue shift
