Hierarchical TiO2 Flower-spheres with Large Surface Area and High Scattering Ability: an Excellent Candidate for High Efficiency Dye Sensitized Solar Cells |
| |
| Authors: | MA Jian YAO Shiting CHENG Pengfei DU Sisi SUN Yanfeng LIU Fengmin LU Geyu |
| |
| Institution: | 1. College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. School of Aerospace Science and Technology, Xidian University, Xi'an 710126, P. R China |
| |
| Abstract: | Hierarchical TiO2 flower-spheres assembled from porous nanosheets-stacked of nanoparticles were synthesized by a simple hydrothermal method with one-step. The as-prepared TiO2 flower-spheres showed a diameter range from 200 nm to 550 nm and a large surface area of 188 m2/g. A double layer photoanode made of P25 nanoparticles and as-prepared TiO2 flower-spheres was fabricated for the dye sensitized solar cells(DSSCs). The efficient light scattering and dye absorption of the photoanode can be attributed to the top-layer of hierarchical TiO2 flower-spheres. DSSCs based on the double layers photoanode exhibit a higher energy conversion efficiency of 8.11% with a short-circuit photocurrent density of 17.87 mA/cm2, indicating that there is an increase of 38% in the conversion efficiency compared to those based on electrode P25(5.91%, 14.09 mA/cm2). |
| |
| Keywords: | Dye sensitized solar cell TiO2 Double layered photoanode High specific surface area Inhomogeneous size |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《高等学校化学研究》浏览原始摘要信息 |
| 点击此处可从《高等学校化学研究》下载免费的PDF全文 |
