دورية
Improved Quantum Efficiency of Highly Efficient Perovskite BaSnO3-Based Dye-Sensitized Solar Cells
| العنوان: | Improved Quantum Efficiency of Highly Efficient Perovskite BaSnO3-Based Dye-Sensitized Solar Cells |
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| المؤلفون: | Shin, Seong Sik, Kim, Ju Seong, Suk, Jae Ho, Lee, Kee Doo, Kim, Dong Wook, Park, Jong Hoon, Cho, In Sun, Hong, Kug Sun, Kim, Jin Young |
| المصدر: | ACS Nano; February 2013, Vol. 7 Issue: 2 p1027-1035, 9p |
| مستخلص: | Ternary oxides are potential candidates as an electron-transporting material that can replace TiO2in dye-sensitized solar cells (DSSCs), as their electronic/optical properties can be easily controlled by manipulating the composition and/or by doping. Here, we report a new highly efficient DSSC using perovskite BaSnO3(BSO) nanoparticles. In addition, the effects of a TiCl4treatment on the physical, chemical, and photovoltaic properties of the BSO-based DSSCs are investigated. The TiCl4treatment was found to form an ultrathin TiO2layer on the BSO surface, the thickness of which increases with the treatment time. The formation of the TiO2shell layer improved the charge-collection efficiency by enhancing the charge transport and suppressing the charge recombination. It was also found that the TiCl4treatment significantly reduces the amount of surface OH species, resulting in reduced dye adsorption and reduced light-harvesting efficiency. The trade-off effect between the charge-collection and light-harvesting efficiencies resulted in the highest quantum efficiency (i.e., short-circuit photocurrent density), leading to the highest conversion efficiency of 5.5% after a TiCl4treatment of 3 min (cf. 4.5% for bare BSO). The conversion efficiency could be increased further to 6.2% by increasing the thickness of the BSO film, which is one of the highest efficiencies from non-TiO2-based DSSCs. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 19360851 1936086X |
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| DOI: | 10.1021/nn305341x |