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 diffracto...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.展开更多
基金Supported by Self-Determined Research Funds of Huazhong Normal University from the Colleges’Basic Research and Operation of Ministry of Education(CCNU09A02011)
文摘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.
