Kim Sung Jae, Anwar M S, Heo Si-Nae, Koo Bon Heun
J Nanosci Nanotechnol. 2016 Jun;16(6):6119-23. doi: 10.1166/jnn.2016.12133.
We report the effect of zinc nitrate (ZN) concentration on the growth of zinc oxide (ZnO) nanorods and their optical and morphological properties. As prepared ZnO nanorods on glass substrate were characterized using field emission scanning electron microscopy (FE-SEM), ultra violet-visible (UV-Vis), Raman and Photo-luminescence (PL) spectroscopy. FE-SEM results show that the nanorods were obtained for the 0.033 and 0.053 M concentration of ZN. As the ZN concentration increased from 0.033 M to 0.053 M, the diameter of the nanorods was increased. It indicated that the diameter of the nanorods was affected by the ZN concentration. The Raman spectra of nanorods show only one peak at 438 cm(-1) corresponding to E2(high) high mode, which means that ZnO nanorods grown perpendicularly on the glass substrate, i.e., the ZnO nanorod arrays are highly c-axis oriented. Room-temperature PL spectrum of the as-grown ZnO nanorods reveals a near-band-edge (NBE) emission peak and defect induced green light emission. The green light emission band at -579 nm might be attributed to surface oxygen vacancies or defects. The UV-visible measurements reflect that the total transmittance for the as grown ZnO nanorods is over 80%. The simple technique presented in this study to grow ZnO nanorods on a glass substrate can be helpful for making the cost effective photovoltaic devices.
我们报道了硝酸锌（ZN）浓度对氧化锌（ZnO）纳米棒生长及其光学和形态学性质的影响。使用场发射扫描电子显微镜（FE-SEM）、紫外可见（UV-Vis）光谱、拉曼光谱和光致发光（PL）光谱对在玻璃基板上制备的ZnO纳米棒进行了表征。FE-SEM结果表明，在ZN浓度为0.033 M和0.053 M时获得了纳米棒。随着ZN浓度从0.033 M增加到0.053 M，纳米棒的直径增大。这表明纳米棒的直径受ZN浓度的影响。纳米棒的拉曼光谱在438 cm⁻¹处仅显示一个对应于E2（高）高模的峰，这意味着ZnO纳米棒垂直生长在玻璃基板上，即ZnO纳米棒阵列具有高度的c轴取向。生长态ZnO纳米棒的室温PL光谱显示出一个近带边（NBE）发射峰和缺陷诱导的绿光发射。-579 nm处的绿光发射带可能归因于表面氧空位或缺陷。紫外可见测量结果表明，生长态ZnO纳米棒的总透过率超过80%。本研究中提出的在玻璃基板上生长ZnO纳米棒的简单技术有助于制造具有成本效益的光伏器件。
