期刊
NANO
卷 9, 期 5, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793292014400074
关键词
Dye-sensitized solar cell; TiO2 sub-microsphere; TiO2 photoanode; scattering effect
资金
- National Basic Research Program of China [2011CBA00700]
- National High Technology Research and Development Program of China [2011AA050527]
- National Natural Science Foundation of China [21173227, 21173228]
The sub-microspheres play multiple roles in enhancing dye adsorption and light-scattering to improve the performance of dye-sensitized solar cells (DSSCs). In this work, the well-defined TiO2 sub-microspheres with anatase granular-like nanocrystals are prepared in high yield by combining hydrolytic process with solvothermal treatment. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results indicated that plenty of rhombic nanoparticles with similar to 18 nm diameter having mutual contacts to neighboring nanoparticles were densely selfassembled into sub-microspheres, and abundant mesopores existed in the whole sub-microspheres with superior light scattering ability. The appropriate pore diameter and relatively high specific surface area of the as-obtained sub-microsphere result in a higher dye adsorption. As expected, by using the sub-microspheres as a scattering layer, a higher photovoltaic conversion efficiency of 10.15% is obtained for DSSCs.
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