THE EFFECT OF ANNEALING TEMPERATURE ON OPTICAL AND PHOTOLUMINESCENCE PROPERTIES OF LiNbO3
THE EFFECT OF ANNEALING TEMPERATURE ON OPTICAL AND PHOTOLUMINESCENCE PROPERTIES OF LiNbO3
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DOI：
10.1142/s0218625x19500689
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发表时间：
2019-12-01
影响因子：
1.1
通讯作者：
Salim, Zaid T.
中科院分区：
文献类型：
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作者：
Fakhri, Makram A.;Salim, Evan T.;Salim, Zaid T.
采用溶胶-凝胶法在石英衬底上沉积铌酸锂（LiNbO 3）纳米结构和微米结构。基于旋涂技术以3000 rpm的速度沉积纳米结构30 s。将样品暴露于从100摄氏度至600摄氏度的不同退火温度范围。利用扫描电子显微镜（SEM）、原子力显微镜（AFM）、紫外-可见光（UV-Vis）和光致发光（PL）研究了薄膜的光学性质和形貌。结果表明，随着退火温度的升高，薄膜的透射率和带隙特性都得到了改善。相反，更高的退火温度导致折射率值的降低，并且晶粒由于退火温度的升高而规则地分布在膜内。这是由于在加热过程中氧化过程对包装密度的影响越来越大。
This paper concerns deposition of nano and micro structures of LithiumNiobate (LiNbO3) on a quartz substrate using sol-gel method. The nanostructure was deposited based on spin coating technique with speed of 3000 rpm for 30 s. Samples were exposed for different annealing temperature ranges from 100 degrees C to 600 degrees C. The optical properties and the morphological results of the grown films have been investigated using the scanning electron microscope (SEM), atomic force microscopy (AFM), optical study through UV-Visible and Photoluminescence (PL). The results showed that good transmission and bandgap properties can be obtained as the annealing temperature increases. In contrast, the higher annealing temperature results in reduction of the refractive index value, and the grains are regularly distributed within the film as a result of increasing the annealing temperature. This comes from the growing effect of packs density as a result of oxidation process during heating process.