Size and morphology effects of titania on dye-sensitized solar cells performance

作者：Chien Wen Chen^*; Lin Chien Chih; Jang Shiue Ming; Kao Tien Hsieh

来源：Thin Solid Films, 2013, 544: 392-398.

DOI：10.1016/j.tsf.2013.02.093

• Titania
• Morphology
• Nanowires
• Spray drying
• Hydrothermal process
• Dye-sensitized solar cell

This study uses commercial titania (P25) to prepare titania nanowires (NWs) using alkali and hydrothermal treatments. Nanosized titania P25 and NWs were used to prepare spray-dried titania P25 (SP25) and spray-dried titania nanowires (SNWs), respectively, using the spray-drying process. These different titania sizes and morphologies were used to fabricate photoelectrodes for dye-sensitized solar cells (DSSCs) and to investigate their effect on cell performance. All prepared titania NWs and SNWs were in the anatase phase after heat treatment at 450 degrees C for 2 h. The specific areas for titania with different morphologies were 49.5 m(2)/g for P25, 48.3 m(2)/g for SP25, 42.6 m(2)/g for NWs, and 40.3 m(2)/g for SNWs. The results show that the surface areas decreased when the titania P25 or NWs were processed by spray drying. In optimal conditions, DSSCs prepared from P25 + 2.5 wt.% NWs with a light-to-electric energy conversion efficiency of 5.88% were produced using a simulated solar light irradiation of 100 mW/cm(2) (AM 1.5).

• 出版日期2013-10-1