溶剂对FTO薄膜的结构和光电性能的影响

采用喷雾热解法(SPD)，分别使用甲醇、乙醇、异丙醇、正丁醇和去离子水作为溶剂制备F掺杂的SnO₂(FTO)透明导电薄膜，使用X射线衍射仪、扫描电子显微镜、四点探针电阻仪、霍尔效应仪和紫外可见分光光度计等手段对薄膜进行测试和表征，研究了溶剂对FTO薄膜结构、形貌和光电性能的影响，研究了溶剂对FTO薄膜结构与光电性能的影响。结果表明：FTO薄膜具有四方相金红石结构；使用不同溶剂制备的薄膜，其表面形貌和颗粒尺寸明显不同；使用甲醇为溶剂制备的FTO薄膜呈现饱满的金字塔状，晶粒尺寸均匀，结构致密，具有最佳的综合光学和电学性能，其电阻率可达4.43×10^-4 Ω·cm，载流子浓度为9.922×10²⁰ cm^-3，品质因数为1.646×10^-2 Ω^-1，可见光区透射比均大于75%。

Effect of Solvents on Structure and Photoelectric Properties of FTO Thin Films

Transparent conductive thin films of fluorine Transparent conductive thin films of fluorine doped tin oxide (FTO) were prepared via spray-pyrolysis (SPD) process using with methanol, ethanol, isopropanol, n-butanol and deionized water as solvents respectively. The films were tested and characterized by X-ray diffraction, scanning electron microscope, four-point probe resistance meter, Hall effect meter and UV-visible spectrophotometer. The effects of solvent on the structure, morphology and photoelectric properties of FTO films were investigated. The results show that when the solvents were with different solvents, the prepared FTO thin films showed the same crystallographic, i.e. a tetrahedral rutile structure, and however their surface morphology and particle size were significantly different. Among others, the FTO thin films prepared with methanol as the solvent showed a dense and full pyramid-like structure al shape, with uniform grain size, compact structure, and the best comprehensive optical and electrical properties, namely, the best resistivity of the film can reach 4.43×10^-4 Ω·cm, the carrier concentration is 9.922×10²⁰ cm^-3, the figure of merit of the film is 1.63×10^-2 Ω^-1, and the visible light transmittance is greater than 75%.