掺Ni的ZnO粉末的Raman光谱研究  

Raman Studies on Ni-Doped ZnO Powders

作　　者：俞慧强[1] 李斌斌[2] 张荣[2] 修向前[2] 谢自力[2] 叶宇达[1] 张孟群[1] 陈强[1] 沈剑沧[3,4] 

机构地区：[1]南京大学现代分析中心,江苏南京210093 [2]江苏省光电信息功能材料重点实验室南京大学物理系,江苏南京210093 [3]江苏省光电信息功能材料重点实验室 [4]南京大学物理系,江苏南京210093

出　　处：《光学学报》2009年第5期1324-1327,共4页Acta Optica Sinica

基　　金：国家863计划(2004AA31G050);国家自然科学基金(60290083,60136020)资助项目

摘　　要：利用拉曼(Raman)光谱对掺镍(Ni)氧化锌(ZnO)粉末的声子谱进行了研究。在掺杂样品的Raman光谱中仍能观察到未掺杂ZnO的声子模式,此外还观察到两个额外模式。掺杂粉末中观察到ZnO的E_2(h)模式表明掺Ni的ZnO仍然保持六角对称结构。652 cm^(-1)额外模式的起源是掺杂引起的ZnO本底缺陷。为了查明544 cm^(-1)处额外模式的起源,分别对掺Ni,掺钴(Co),和掺锰(Mn)的ZnO粉末的Raman光谱进行了对比研究。结果表明544 cm^(-1)额外模式起源于Ni相关的局域振动模式。对光谱中的其他声子模式的起源也进行了讨论;同时还报告了利用325nm激光作激发源观察到掺Ni样品的多重纵光学(LO)声子模式的结果。Raman spectrum is performed to study the phonon modes of Ni-doped ZnO powders. The phonon mode of undoped ZnO and two additional modes （AMs） have been observed in the Raman spectra of doped swatch. The observation of E2（h） phonon mode in the samples indicates that the doped ZnO powders still keep the hexagonal structure. The AM at 652 cm-1 is ascribed as local vibrational mode due to the host defects. In order to identify the origin of the AM at 544 cm-1, Raman spectrums of the Ni-, Co-, and Mn-doped ZnO powders have been carried out respectively. The results show that the AM at 544 cm-1 is related to Ni impurity. Origins of other phonon modes in the spectra are discussed as well. The multi-LO phonons scattering observed by an exciting source of 325 nm on Ni-doped ZnO powders is reported.

关 键 词：散射 掺杂 拉曼光谱 

分 类 号：O436[机械工程—光学工程]