【摘要】 纳米晶TiO2 薄膜在光电变色器件中具有很重要的作用。它的微结构直接影响染料的吸附、光的散射以及电荷输运的特性。因此 ,探索TiO2 薄膜的微结构 (如粒径、表面形貌和厚度等 )及光电性能是非常有意义的。采用电子束蒸发工艺制备了光电变色器件用纳晶TiO2 薄膜 ,利用原子力显微镜、X射线衍射、俄歇电子能谱等手段对纳米晶TiO2 薄膜的表面形貌、结晶状态及组分进行了分析。从理论上研究和讨论了纳米晶TiO2 薄膜晶粒尺寸对光电性能的影响 ,并用量子限制效应解释了吸收光谱峰值波长随粒径减小而发生蓝移的现象更多还原

【Abstract】 The nanocrystalline TiO₂ thin films plays an important role in the photoelectrochromic devices. The microstructure of nanocrystalline TiO₂ has effects on the properties of absorption of dyes, diffraction of light and transportation of charges. Nanocrystalline TiO₂ thin films were prepared by the electron beam evaporation. The surface morphology, crystal state and composition were analyzed with atomic force microscope （AFM）, X-ray diffraction （XRD） and Auger electronic spectroscopy （AES）. The photoelectric performances affected by particle size were discussed theoretically. And the blue-shift phenomenon of the absorption peak value was explained by quantum confinement effect.更多还原