Zn1-xMnxS 纳米颗粒的制备及发光性质

Preparation and luminescent of Zn1-xMnxS nanoparticles

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.