Zn_(1-x)Mn_xS稀磁半导体的合成与光学性能  

Synthesis and Optical Properties of Zn_(1-x)Mn_xS Dilute Magnetic Semiconductors

作　　者：武美荣 魏智强[1,2] 武晓娟[1,2] 杨华[2] 姜金龙[2] 

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]兰州理工大学理学院,兰州730050

出　　处：《材料工程》2017年第7期54-59,共6页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51261015);甘肃省自然科学基金资助项目(1308RJZA238)

摘　　要：通过水热法制备不同掺杂浓度的Zn_(1-x)Mn_xS(x=0.00,0.02,0.05,0.07)稀磁半导体材料,研究Mn^(2+)掺杂浓度对ZnS纳米棒微观结构和光学性能的影响。采用X射线衍射(XRD)、高分辨透射电子显微镜(HRTEM)、选区电子衍射(SAED)、X射线能量色散分析谱仪(XEDS)和紫外可见吸收光谱(UV-vis)对样品的晶体结构、形貌和光学性能进行表征。结果表明:制备的所有样品均具有结晶良好的纤锌矿结构,没有杂峰出现,生成纯相Zn_(1-x)Mn_xS纳米晶。样品形貌为纳米棒状结构,分散性良好。掺杂的Mn元素进入到ZnS纳米晶中,Mn^(2+)替代了Zn^(2+),而且随着Mn掺杂量的增加晶格常数减小。同时UV-vis光谱发现样品的光学带隙增大,发生了蓝移现象。Diluted magnetic semiconductors Zn1-xMnxS with different consistency （x=0.00, 0.02, 0.05, 0.07） were synthesized by hydrothermal method, and the effects of doping concentration Mn2＋ on the microstructure and optical properties of ZnS nanorods were investigated.The crystal microstructure,morphology and optical properties of the products were characterized by X-ray diffraction （XRD）, high-resolution transmission electron microscopy （HRTEM）, corresponding selected-area electron diffraction （SAED）, X-ray energy dispersive spectrometry （XEDS） and ultraviolet-visible spectrophotometer（UV-vis）.The results show that all samples synthesized by this method possess wurtzite structure with good crystallization, no other impurity phase appears and generates single-phase Zn1-xMnxS nanocrystalline.The morphology of the samples is nanorods and well disperses.The doping element of Mn enters into the ZnS nanocrystals, Mn2＋ replaces Zn2＋, and the lattice constant decreases with the increase of Mn content.Meanwhile, the optical band gap increases and the blue shift occurs for the sample in the UV-vis spectra.

关 键 词：稀磁半导体 Zn1-xMnxS 水热法 光学性能 

分 类 号：TB383[一般工业技术—材料科学与工程]