【摘要】 研究添加第三组分对TiO2光电特性的调节规律对于研制新型气敏材料、太阳能电池等具有重要意义。本文采用溶胶-凝胶技术制备了添加聚乙二醇(PEG)的TiO2薄膜,研究了PEG的添加对晶体型态、表面形貌和半导体特性等的影响。结果表明,PEG的添加量与相对分子质量对TiO2薄膜的透光性有明显影响,添加PEG2000(2000为PEG的相对分子质量)的TiO2薄膜在350℃时对CO的气敏性达到3.5,这种p-型TiO2薄膜材料在太阳能电池、气敏传感器等领域有广阔的应用前景。更多还原

【Abstract】 Effects of the foreign atoms on the electrical and optical property of titania films are fundamental to explore novel gas-sensing and solar cell materials.The polyethylene glycol（PEG）-doped TiO₂ films is prepared using the sol-gel method and the microstructure,crystallite morphology and semiconductor property of the films is characterized.The transmittance of the TiO₂ film depended on the content and the molecular weight of the PEG additive.The PEG2000-doped TiO₂ film showed a high gas response to CO at 350 ℃.This p-type PEG2000-doped TiO₂ film has potential applications to develop solar cells and gas sensors.更多还原