양극산화법에 의한 TiO2 나노튜브 어레이의 제조 및 광전기화학적 특성에 관한 연구

Abstract

Self-standing TiO2 nanotube arrays were fabricated by potentiostatic anodic oxidation method using pure Ti foil as a working electrode and ethylene glycol solution as electrolytes with small addition of NH4F and H2O. The influences of anodization temperature and time on the morphology and formation of TiO2 nanotube arrays were investigated. The fabricated TiO2 nanotube arrays were applied as a photoelectrode to dye-sensitized solar cells. Regardless of anodizing temperature and time, the average diameter and wall thickness of TiO2 nanotube show a similar value, whereas the thickness show a different trend with reaction temperature. The thickness of TiO2 nanotube arrays anodized at 20oC and 30oC was time-dependent, but on the other hand its at 10oC are independent of anodization time. The conversion efficiency is low, which is due to a morphology breaking of the TiO2nanotube arrays in manufacturing process of photoelectrode.