Structural Properties of Anodic Titanium Dioxide (TiO_2) Nanotubes Film via Electrochemical Anodization

摘要

Light emitting diode (LED) is solid state lighting uses semiconductor material and convert the electrical energy to light energy. Titanium dioxide (TiO_2) was used in optoelectronic devices because it is good purity and easily synthesizing onto thin film. TiO_2 nanotubes was prepared by electrochemical anodization method at room temperature. The TiO_2 nanotubes was investigated amorphous and annealed sample at 450°C. The surface morphology revealed that sample annealed at 450°C showed uniformity with a regular porous on top layer of TiO_2. Raman pattern showed the amorphous-to-crystalline anodic TiO_2 sample transition with anodization. Optical properties showed the TiO_2 nanotubes annealed at 450°C has not sharp absorbance edge and it is relates to the oxygen deficiency in nanotube material. The TiO_2 nanotubes film annealed at 450°C has potential apply to LED devices.