TiO_2@MgO Core-Shell Film:Fabrication and Application to Dye-Sensitized Solar Cells

作     者：LI Bihui, Lü Gang, LUO Lijuan, TANG Yiwen Institute of Nano-Science and Technology, Huazhong Normal University, Wuhan 430079, Hubei, China 

作者机构：Institute of Nano-Science and Technology Huazhong Normal University Wuhan Hubei China 

出 版 物：《Wuhan University Journal of Natural Sciences》 (武汉大学学报（自然科学英文版）)

年 卷 期：2010年第15卷第4期

页      面：325-329页

学科分类：07[理学] 08[工学] 

基　　金：Supported by Self-Determined Research Funds of Huazhong Normal University from the Colleges’ Basic Research and Operation of Ministry of Education (CCNU09A02011) 

主　　题：TiO2@MgO core-shell electrode dye-sensitized solar cell (DSSC) 

摘      要：In this study,TiO2@MgO core-shell film was obtained by using a simple chemical bath deposition method to coat a thin MgO film around TiO2 nanoparticles. The core-shell configuration was characterized by X-ray diffractometer (XRD),scanning elec-tron microscopy (SEM),energy dispersive X-ray spectroscopy (EDX),and high-resolution transmission electron microscopy (HRTEM). Lattice fringes were observed for the TiO2 particles,and the MgO shell showed an amorphous structure,revealing a clear distinction between the core and shell materials. Applying the core-shell film as photoanode to the dye-sensitized solar cells (DSSCs),it shows a superior performance compared to the pure TiO2 electrode. Under the illumination of simulated sunlight (75 mW-cm-2),the short circuit photocurrent (Jsc),the open circuit photovoltage (Voc),and the fill factor (fF) are 8.80 mA-cm-2,646 mV,and 0.69,respectively,and the conversion efficiency (η) in-creased by 21.8% (from 4.32% to 5.26%) when dipping for opti-mum condition.