Dye Regeneration Kinetics in Dye-Sensitized Solar Cells

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• 作者：Torben Daeneke ; Attila J. Mozer ; Yu Uemura ; Satoshi Makuta ; Monika Fekete ; Yasuhiro Tachibana ; Nagatoshi Koumura ; Udo Bach ; Leone Spiccia
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：October 17, 2012
• 年：2012
• 卷：134
• 期：41
• 页码：16925-16928
• 全文大小：297K
• 年卷期：v.134,no.41(October 17, 2012)
• ISSN：1520-5126

文摘

The ideal driving force for dye regeneration is an important parameter for the design of efficient dye-sensitized solar cells. Here, nanosecond laser transient absorption spectroscopy was used to measure the rates of regeneration of six organic carbazole-based dyes by nine ferrocene derivatives whose redox potentials vary by 0.85 V, resulting in 54 different driving-force conditions. It was found that the reaction follows the behavior expected for the Marcus normal region for driving forces below 29 kJ mol^鈥? (螖E = 0.30 V). Driving forces of 29鈥?01 kJ mol^鈥? (螖E = 0.30鈥?.05 V) resulted in similar reaction rates, indicating that dye regeneration is diffusion controlled. Quantitative dye regeneration (theoretical regeneration yield 99.9%) can be achieved with a driving force of 20鈥?5 kJ mol^鈥? (螖E 鈮?0.20鈥?.25 V).