摻Ti對ZnO納米顆粒的微觀結(jié)構(gòu)與光學(xué)特性的影響
發(fā)布時間：2018-07-25 11:11
【摘要】：本研究利用溶膠凝膠法制備了Ti_xZn_(1-x)O納米粒子,并且分析了Ti摻雜對ZnO納米粒子晶體結(jié)構(gòu)與光學(xué)特性的影響.微觀結(jié)構(gòu)分析得知Ti摻雜會使ZnO結(jié)晶較差,晶格常數(shù)與壓縮應(yīng)力增大,但可使晶粒縮小至5 nm左右.光致發(fā)光(PL)光譜分析得出Ti摻雜會造成氧空位缺陷減少,近帶邊發(fā)光(NBE)峰值藍(lán)移,但NBE峰值強(qiáng)度增幅變化卻不大.拉曼光譜分析表明Ti_xZn_(1-x)O的結(jié)晶品質(zhì)不佳且NBE峰值強(qiáng)度的增幅未完全依循多聲子模態(tài)信號減弱而增強(qiáng)的規(guī)律,其原因是NBE峰值強(qiáng)度除受多聲子模態(tài)信號影響外還受其它因素的影響.TC(002)值越高時樣品的多聲子模態(tài)信號會越弱,而NBE峰值強(qiáng)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.
【作者單位】： 蘇州工業(yè)職業(yè)技術(shù)學(xué)院;中國科學(xué)技術(shù)大學(xué)納米科學(xué)技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金(11404322) 江蘇省自然科學(xué)基金(BK20160352) 蘇工院教改課題 蘇工院自然科學(xué)課題
【分類號】：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.
【作者單位】： 蘇州工業(yè)職業(yè)技術(shù)學(xué)院;中國科學(xué)技術(shù)大學(xué)納米科學(xué)技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金(11404322) 江蘇省自然科學(xué)基金(BK20160352) 蘇工院教改課題 蘇工院自然科學(xué)課題
【分類號】：TB383.1;TQ134.11
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