掺Ti对ZnO纳米颗粒的微观结构与光学特性的影响
发布时间：2018-07-25 11:11
【摘要】：本研究利用溶胶凝胶法制备了Ti_xZn_(1-x)O纳米粒子,并且分析了Ti掺杂对ZnO纳米粒子晶体结构与光学特性的影响.微观结构分析得知Ti掺杂会使ZnO结晶较差,晶格常数与压缩应力增大,但可使晶粒缩小至5 nm左右.光致发光(PL)光谱分析得出Ti掺杂会造成氧空位缺陷减少,近带边发光(NBE)峰值蓝移,但NBE峰值强度增幅变化却不大.拉曼光谱分析表明Ti_xZn_(1-x)O的结晶品质不佳且NBE峰值强度的增幅未完全依循多声子模态信号减弱而增强的规律,其原因是NBE峰值强度除受多声子模态信号影响外还受其它因素的影响.TC(002)值越高时样品的多声子模态信号会越弱,而NBE峰值强度增幅越大.
[Abstract]:TiSZ _ (1-x) O nanoparticles were prepared by sol-gel method, and the effects of Ti doping on the crystal structure and optical properties of ZnO nanoparticles were analyzed. The microstructure analysis shows that Ti doping can make the crystallization of ZnO worse, the lattice constant and compressive stress increase, but the grain size can be reduced to about 5 nm. The analysis of photoluminescence (PL) spectra shows that Ti doping can reduce the oxygen vacancy defects and blue shift the peak value of (NBE) near the band edge, but the increase of peak intensity of NBE does not change much. Raman spectrum analysis shows that the crystallization quality of TixZn1-x O is poor and the increase of peak intensity of NBE does not follow the law of the weakening of multiphonon mode signal and the enhancement of the peak intensity of NBE. The reason is that the peak intensity of NBE is affected by other factors besides polyphonon mode signal. The higher the value of TC (002) is, the weaker the multi-phonon mode signal of the sample is, and the bigger the increase of peak intensity of NBE is.
【作者单位】： 苏州工业职业技术学院;中国科学技术大学纳米科学技术学院;
【基金】：国家自然科学基金(11404322) 江苏省自然科学基金(BK20160352) 苏工院教改课题 苏工院自然科学课题
【分类号】：TB383.1;TQ134.11
[Abstract]:TiSZ _ (1-x) O nanoparticles were prepared by sol-gel method, and the effects of Ti doping on the crystal structure and optical properties of ZnO nanoparticles were analyzed. The microstructure analysis shows that Ti doping can make the crystallization of ZnO worse, the lattice constant and compressive stress increase, but the grain size can be reduced to about 5 nm. The analysis of photoluminescence (PL) spectra shows that Ti doping can reduce the oxygen vacancy defects and blue shift the peak value of (NBE) near the band edge, but the increase of peak intensity of NBE does not change much. Raman spectrum analysis shows that the crystallization quality of TixZn1-x O is poor and the increase of peak intensity of NBE does not follow the law of the weakening of multiphonon mode signal and the enhancement of the peak intensity of NBE. The reason is that the peak intensity of NBE is affected by other factors besides polyphonon mode signal. The higher the value of TC (002) is, the weaker the multi-phonon mode signal of the sample is, and the bigger the increase of peak intensity of NBE is.
【作者单位】： 苏州工业职业技术学院;中国科学技术大学纳米科学技术学院;
【基金】：国家自然科学基金(11404322) 江苏省自然科学基金(BK20160352) 苏工院教改课题 苏工院自然科学课题
【分类号】：TB383.1;TQ134.11
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