电化学沉积Mn掺杂纳米ZnO的结构和光学性质研究（英文）

Structural and Photoluminescence Properties of Mn-doped ZnO Nanocolumns Grown by Cathodic Electrodeposition

在Si衬底上用电化学沉积方法制备了Mn掺杂ZnO纳米晶,X射线衍射(XRD)的研究表明,Mn离子取代Zn离子进入到ZnO晶格中。场发射扫描电子显微镜(SEM)图像显示,ZnO纳米晶形貌是柱状的。从光致发光谱可以看出,由于掺杂效应导致可见发射带扩大,PL谱从122.8 K到302.2 K范围的拟合结果表明,Mn掺杂导致激子结合能的降低。

Mn-doped ZnO nanocrystal was prepared on Si substrates by cathodic electrodeposition. X-ray diffraction（XRD） study suggests that the Mn ions are substituted for Zn position into ZnO crystal. Field-emission scanning electron microscopy（SEM） images show the column-like morphology of ZnO nanocrystal. In photoluminescence spectrum, the visible emission band is broadened because of the doping effect. The fitted result of the temperature-dependent PL spectra in the range from 122.8 K to 302.2 K indicates that Mn dopant could lead to the decrease of the exciton binding energy.