TiO_(2)纳米片薄膜的制备及光电性能研究  

Preparation and photoelectric properties of TiO_(2) nanosheet film

作　　者：王勇 解杰 汪国树 李媛[1] 周儒 WANG Yong;XIE Jie;WANG Guoshu;LI Yuan;ZHOU Ru(School of Electronic Science and Applied Physics,Hefei University of Technology,Hefei 230601,China;School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230601 [2]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2022年第7期1003-1008,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51602088,11775066,21677045);中国博士后科学基金资助项目(2017T100313)。

摘　　要：为了提高TiO_(2)薄膜的光学与电化学性能,文章利用一步水热法在P25纳米晶薄膜(P-film)的基础上制备了新颖的三维网络结构TiO_(2)纳米片薄膜(S-film)。通过场发射扫描电子显微镜(field emission scanning electron microscope,FESEM)和场发射透射电子显微镜(field emission transmission electron microscope,FETEM)表征揭示S-film由P25颗粒转化而来,并可以通过水热时间调控S-film的厚度。紫外-可见漫反射光谱显示,在300~800 nm波长范围内S-film的引入有利于薄膜光散射性能的提升,且散射能力随着S-film薄膜厚度的增加而增强。光伏性能测试表明,一定厚度的S-film有利于提高染料敏化太阳能电池的光电转换效率,电化学阻抗谱进一步揭示S-film能够提高光生电子-空穴对的分离效率。In order to improve the optical and electrochemical properties of TiO_(2) film,a novel three-dimensional network structure TiO_(2) nanosheet film(S-film)was prepared on the basis of P25 nanocrystalline film(P-film)by one-step hydrothermal method.The samples were characterized by field emission scanning electron microscope(FESEM)and field emission transmission electron microscope(FETEM).It is shown that the S-film is formed by the transformation of P25 particles,and the thickness of S-film can be controlled by the hydrothermal time.Ultraviolet-visible diffuse reflectance spectra(UV-vis DRS)show that the S-film is conducive to the improvement of light scattering ability of the thin film in the wavelength range of 300-800 nm,and the scattering ability increases with the increase of the S-film thickness.Photovoltaic performance tests show that an appropriate thickness of S-film is beneficial to improving the photoelectric conversion efficiency of dye-sensitized solar cells(DSSCs).Electrochemical impedance spectroscopy(EIS)further shows that S-film is beneficial for the separation of photogenerated electron-hole pairs.

关 键 词：一步水热法 P25纳米晶薄膜(P-film) TiO_(2)纳米片薄膜(S-film) 光散射 染料敏化太阳能电池 

分 类 号：TB383[一般工业技术—材料科学与工程]