Multi-layered TiO2 photoanodes from different precursors of nanocrystals for dye-sensitized solar cells
Solar Energy, cilt.173, ss.752-758, 2018 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 173
- Basım Tarihi: 2018
- Doi Numarası: 10.1016/j.solener.2018.08.027
- Dergi Adı: Solar Energy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.752-758
- Anahtar Kelimeler: Charge-transfer kinetics, Dye-sensitized solar cells, Multilayer, Photoanode
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
Multi-layered titanium dioxide photoanodes consisting of various layers treated by titanium tetrachloride and titanium isopropoxide are obtained for dye-sensitized solar cells. This process is successfully implemented to fabricate highly efficient photoanodes for dye-sensitized solar cells, demonstrating that performance of the cells is improved by optimizing the multi-layered titanium dioxide photoanodes. Charge-transfer kinetics of the devices is analyzed by impedance spectroscopy. The conversion efficiency of the devices is considerably boosted from 6.73% to 8.43% by tuning the photoanode structure from monolayer to multilayer. The best power conversion efficiency is obtained on the device with a photoanode composed of double pre-treated and one post-treated layers of titanium dioxide. This enhanced efficiency is mainly attributed to the improved charge transfer process characterized by a larger resistance at electrolyte/photoanode interface, exhibiting a longer electron lifetime.