摘要
本文采用胶体化学方法合成了无稳定剂修饰和巯基丙酸为稳定剂的单分散Zn S∶Mn掺杂纳米晶,研究了稳定剂对纳米晶荧光性能的影响。紫外吸收光谱说明了掺杂纳米晶具有明显的量子限域效应,与体相材料相比,紫外吸收带边蓝移了0.29 e V。荧光发射光谱研究表明,巯基丙酸稳定剂对纳米晶表面的修饰使得主体Zn S纳米晶的表面缺陷发射明显消失。掺杂纳米晶在575 nm处有一强的荧光发射峰,其归属于Mn的4T1-6A1跃迁产生的荧光发射。
Zn S∶ Mn semiconductor nanocrystals（ NCs） were synthesized via colloidal chemical method at 70°C without capping agent and using 3- mercaptopropionic acid（ MPA） as capping agent,respectively. The effect of capping agent on photoluminescence of Zn S∶ Mn NCs was studied. The PL results show that MPA could well modify the surface of NCs and eliminate the surface defects,as a result of which,surface defect emission of Zn S NCs is substituted with d- d（ 4T1→6A1） transition emission of Mn2 ＋ ions. UV- Vis spectra indicated that the characteristic absorption band edge of Zn S∶ Mn NCs was blue- shifted by 0. 29 e V from that of the corresponding bulk band gap of Zn S owing to quantum confinement effect.
出处
《化工时刊》
CAS
2015年第6期8-10,共3页
Chemical Industry Times
基金
江苏省高等学校大学生创新创业训练计划项目(201311460028Y)
