|
|||||
|
|
Down-converting lanthanide doped TiO2 photoelectrodes for efficiency enhancement of dye-sensitized solar cells |
|
| Authors: | H. HafezM. Saif M.S.A. Abdel-Mottaleb |
| Affiliation: | a Environmental Studies and Research Institute (ESRI), Minoufiya University, Sadat Branch, Sadat City, Egypt b Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt c Nano-Photochemistry and Solarchemistry Lab., Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, 11566 Cairo, Egypt |
| Abstract: | Lanthanide (Ln3+) doped TiO2 down-conversion photoelectrodes (Ln3+ = Eu3+ and Sm3+ ions) are used to enhance the photovoltaic efficiency of dye-sensitized solar cells (DSSC). We report on achieving fill factors of 0.67 and 0.69 and efficiencies of 5.81% and 5.16% for Sm3+ and Eu3+, respectively. This is compared to the 4.23% efficiency for the undoped-titania photoelectrodes. This enhancement is probably due to the improved UV radiation harvesting via a down-conversion luminescence process by the lanthanide ions. The structure, optical and photoluminescence properties of the down-converting photoelectrode are characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray (EDX) and room temperature photoluminescence excitation and emission spectrofluorimetric measurements. |
| Keywords: | Dye-sensitized solar cells Lanthanide ions Down-conversion |
| 本文献已被 ScienceDirect 等数据库收录！ | |