Effect of Extended 蟺-Conjugation of the Donor Structure of Organic D鈥揂鈭捪€鈥揂 Dyes on the Photovoltaic Performance of Dye-Sensitized Solar Cells
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- 作者：Masataka Katono ; Mateusz Wielopolski ; Magdalena Marszalek ; Takeru Bessho ; Jacques-E. Moser ; Robin Humphry-Baker ; Shaik M. Zakeeruddin ; Michael Gr盲tzel
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：July 31, 2014
- 年：2014
- 卷：118
- 期：30
- 页码：16486-16493
- 全文大小：462K
- ISSN：1932-7455
文摘
Two new D鈥揂鈭捪€-spacer鈥揂 organic dyes, KM-10 and KM-11, containing a benzothiadiazole unit in a 蟺-spacer and a cyanoacrylic acid as an acceptor have been synthesized and tested as sensitizers in dye-sensitized solar cells. Structural variations of the donor moiety, i.e., 蟺-extension of the diphenylamine electron-donating groups, gave rise to different photovoltaic efficiencies鈥?.1% for KM-10 and 8% for KM-11鈥攄espite having comparable absorption properties. A detailed investigation, including transient photocurrent and photovoltage decay measurement, transient absorption spectroscopy, and quantum chemical methods, provided important conclusions about the nature of the substitution on the photovoltaic properties of dyes.