Author/Authors :
Xiuqin Zhao، نويسنده , , Jae Yeop Lee، نويسنده , , Cho-Rong Kim، نويسنده , , Joohoe Heo، نويسنده , , Chang Mi Shin، نويسنده , , Jae-Young Leem، نويسنده , , Hyukhyun Ryu، نويسنده , , Jiho Chang، نويسنده , , Hong Chan Lee، نويسنده , , Woo-Gwang Jung، نويسنده , , Chang-Sik Son، نويسنده , , BYOUNG-CHUL SHIN، نويسنده , , Won Jae Lee، نويسنده , , Swee Tiam Tan، نويسنده , , Junliang Zhao، نويسنده , , Xiaowei Sun، نويسنده ,
Abstract :
This study evaluated the effects of precursor concentration ranging from 0.06 to 1.5 M on the properties of hydrothermally grown ZnO on annealed ZnO buffered Si substrates. At relatively low concentrations (no more than 0.5 M), well-aligned ZnO arrays were grown on ZnO/Si(1 0 0) due to heterogeneous nucleation. As the concentration was increased to 1.0 M, the morphologies changed to randomly accumulated particles as a result of homogeneous nucleation. The crystal and optical properties of the materials were investigated by X-ray diffractometer (XRD) and photoluminescence (PL) measurement, respectively. It was found that the best crystal and optical properties were obtained with concentrations of 0.5 and 0.3 M, respectively. These properties were observed to degrade when the concentration was raised to more than 1.0 M.
