采用化学溶液沉积法,在经ZnO纳米粒子膜修饰的FTO导电玻璃基底上制备了ZnO纳米棒阵列,探讨了生长液浓度对ZnO纳米棒阵列形貌和光学性能的影响。利用XRD、FESEM、透射光谱和光致发光谱对样品的结构、形貌和光学性能进行了表征,结果表明,所制备的ZnO纳米棒为六方纤锌矿相,沿c轴择优取向生长;ZnO纳米棒阵列生长较为致密,取向性较一致,在可见光区具有很高的透光率,在378nm有很强的紫外发射峰;随着生长液浓度的降低,ZnO纳米棒阵列的缺陷可望大幅度下降。
ZnO nanorod arrays were prepared by chemical solution deposition on pre-modified FTO substrate with ZnO nanoparticles. The effects of concentration of growth solution on the morphology and optical properties of ZnO nanorod arrays were investigated. X-ray diffraction (XRD)~ field emission scanning electron microscopy (FESEM), transmission spectra and photoluminescence spectrum were used to characterize the crystal structures, mor- phology and optical properties of the ZnO nanorod arrays. XRD pattern indicates that the as-prepared ZnO nanorods are hexagonal wurtzite structures and grow along c-axis. SEM results show that the ZnO nanorod arrays are dense ar- ranged and the orientation shows good consistence. Optical study reveals that the ZnO nanorod arrays exhibit high transmittance in visible domain and have a strong near-band ultraviolet emission at 378nm. It can he expected that the structural defects decrease greatly with the decrease of the growth solution concentration.