Institute for Research and Development for Photovoltaic Energy (IRDEP), UMR 7174 CNRS/EDF/Chimie-Paristech, Chatou, France.
Nanotechnology. 2010 Oct 1;21(39):395603. doi: 10.1088/0957-4484/21/39/395603. Epub 2010 Sep 1.
The electrodeposition of ZnO nanorods on ZnO:Al films with different orientations is reported. The influence of the total charge exchanged during electrodeposition on the nanorod's geometry (length, diameter, aspect ratio and surface density) and the optical transmission properties of the nanorod arrays is studied on a [0001]-oriented ZnO:Al substrate. The nanorods are highly vertically oriented along the c axis, following the lattice matching with the substrate. The growth on a [1010] and [1120] ZnO:Al-oriented substrate with c axis parallel to the substrate leads to a systematic deviation angle of 55 degrees from the perpendicular direction. This finding has been explained by the occurrence of a minority orientation with the [1011] planes parallel to the surface, with a preferential growth on corresponding [0001] termination. Substrate crystalline orientation is thereby found to be a major parameter in finely tuning the orientation of the nanorod array. This new approach allows us to optimize the light scattering properties of the films.
本文报道了在不同取向的 ZnO:Al 薄膜上电沉积 ZnO 纳米棒的情况。研究了在[0001]取向的 ZnO:Al 衬底上，电沉积过程中总电荷量对纳米棒的几何形状（长度、直径、纵横比和表面密度）和纳米棒阵列的光学透过率的影响。纳米棒沿着 c 轴高度垂直取向，与衬底的晶格匹配。在与衬底平行的 c 轴的[1010]和[1120] ZnO:Al 取向衬底上生长导致与垂直方向的系统偏离角为 55 度。这一发现可以通过[1011]面平行于表面的少数取向的出现来解释，优先在相应的[0001]终止面上生长。因此，衬底的结晶取向是精细调整纳米棒阵列取向的主要参数。这种新方法使我们能够优化薄膜的光散射性能。
