Srinath N R, Manjunatha H C, Vidya Y S, Munirathnam R, Sridhar K N, Manjunatha S, Krishnakanth E
Department of Physics, Government College for Women Kolar-563101 Karnataka India
Department of Physics, Lal Bahadur Shastri Government First Grade College RT Nagar Bangalore-560032 Karnataka India
RSC Adv. 2023 Jun 9;13(26):17508-17515. doi: 10.1039/d3ra01969a.
For the first time, copper aluminate nanoparticles (NPs) are synthesized by a combustion method using urea as a fuel (CAOU) and (tulsi) extract as a reducing agent (CAOT). The Bragg reflections of the as-formed product confirm the formation of a cubic phase with 3̄ space group. The crystallite size, crystallinity and other structural parameters are discussed. The surface morphology of CAOU is agglomerated in nature whereas that of CAOT is hexagonal in shape. The smaller crystallite size CAOT NPs show a higher energy band gap. The photoluminescence (PL) analysis excited at 302 nm shows that the CIE coordinates fall in the red region. The oxygen defects are mainly responsible for the PL emission. The CCT coordinates confirm that both CAOU and CAOT NPs can find an application in warm light emitting diodes.
首次通过燃烧法合成了铝酸铜纳米颗粒（NPs），使用尿素作为燃料（CAOU），并使用（罗勒）提取物作为还原剂（CAOT）。所形成产物的布拉格反射证实形成了具有3̄空间群的立方相。讨论了微晶尺寸、结晶度和其他结构参数。CAOU的表面形态本质上是团聚的，而CAOT的表面形态是六边形的。较小微晶尺寸的CAOT NPs显示出更高的能带隙。在302 nm激发下的光致发光（PL）分析表明，CIE坐标落在红色区域。氧缺陷是PL发射的主要原因。CCT坐标证实，CAOU和CAOT NPs均可应用于暖光发光二极管。
