微波法制备Mn2+掺杂ZnSe纳米材料及谱学性能研究

过渡金属掺杂的Ⅱ-Ⅳ族纳米材料有望替代CdSe类量子点作为新型的荧光标记物而受到广泛关注.利用微波加热法的体加热特点,以不同有机胺为配体溶剂,控制反应条件,制备了Mn2+掺杂的ZnSe纳米材料,并分别利用TEM、EDS、荧光光谱等手段对其形貌、结构和性能的关系进行了探索.Mn2+掺杂的纳米ZnSe粒子为200～500 nm的球形粒子,表面平整,为单晶的纤锌矿结构.掺杂后纳米粒子的发射峰显示Mn2+的跃迁发射,但不同的配体溶剂和掺杂量对产物的发光性能有明显影响.

Microwave-assisted synthesis and fluorescence property of mn-doped ZnSe nanoparticles

Transition metal doped II-IV nanocrystals, which are expected to substitute for CdSe quantum dots as a new class of fluorescent label, obtain widespread concerns. In the present paper, Mn-doped ZnSe nanoparticles were prepared by microwave-irradiation method. Different organic amines were chosen. The effects of ligand and reaction conditions on the morphology and optical properties were investigated. TEM, EDS and photoluminescence spectra were used to investigate their morphology, structure and optical performance. The results showed that the Mn-doped ZnSe nanoparticles were orange and their average size was 200-500 nm. They had structured surface and single crystal wurtzite structure. The emission peak at about 530 nm was detected in the photoluminescence spectrum, which was attributable to Mn2+ transition emission. The effects of different ligands and doping ratio (Mn:Zn) on the photoluminescence properties were significant.