Zn1-xMnxS 纳米颗粒的制备及发光性质
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Preparation and luminescent of Zn1-xMnxS nanoparticles
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    摘要:

    采用水热法制备Mn离子掺杂的ZnS(ZnS∶Mn)纳米颗粒,研究不同比例掺杂Mn离子对Zn1-xMnxS 纳米颗粒光致发光性质的影响。通过X 射线衍射(XRD)和透射电子显微镜(TEM)对样品的物相和形貌进行分析表征,结果显示Zn1-xMnxS(x=0、0.01、0.03、0.05、0.07、0.10)为六方纤锌矿结构的球形纳米晶,晶粒大小均匀,粒径在15~20nm 之间。室温下,用350nm 波长的紫外光激发Zn1-xMnxS纳米粒子,可以得到浅施主能级与锰t2 能级之间的跃迁产生的蓝色发光,发光强度随锰掺杂量的增大先增强后减弱,发射峰位随锰掺杂量的变化有一定移动。究其原因可能与硫空位有关,硫空位影响ZnS的浅施主能级,锌锰比对硫空位的数量和能级位置有一定影响。

    Abstract:

    Mn-doped ZnS (ZnS:Mn) nanoparticles were prepared via hydrothermal method, studied effects on photoluminescence that different proportions Mn ions on Zn1-xMnxS. The composition, morphology, microstructure and optical property of the sample were characterized by X-ray diffraction (XRD).The results showed that the Zn1-xMnxS (x = 0,0.01,0.03,0.05,0.07,0.10) nanoparticles were spherical hexagonal structure of nanocrystalline, uniform particle size between 15 ~ 20nm. At room temperature, using the UV excitation wavelength is 350nm stimulate Zn1-xMnxS nanoparticles. Blue light emission which is produced by transition between shallow donor level and manganese t2 level can be obtained. Luminous intensity with the increasing amount of manganese-doped increased decreased after the first.And emission peaks have a mobile with the change of manganese-doped content. The reason may be related to sulfur vacancies which influence shallow donor level of ZnS. The proportion of zinc-manganese has an impact on the amount of sulfur vacancies and level position.

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引用本文格式: 王青,张旭东,魏智强,戴剑锋,李维学. Zn1-xMnxS 纳米颗粒的制备及发光性质 [J]. 四川大学学报: 自然科学版, 2016, 53: 152~156.

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  • 收稿日期:2015-03-01
  • 最后修改日期:2015-05-04
  • 录用日期:2015-05-08
  • 在线发布日期: 2016-05-30