Thiadiazolo[3,4-c]pyridine Acceptor Based Blue Sensitizers for High Efficiency Dye-Sensitized Solar Cells

详细信息    查看全文

• 作者：Jiangyi Mao ; Jiabao Yang ; Jo毛l Teuscher ; Thomas Moehl ; Chenyi Yi ; Robin Humphry-Baker ; Pascal Comte ; Carole Gr盲tzel ; Jianli Hua ; Shaik M. Zakeeruddin ; He Tian ; 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：17090-17099
• 全文大小：496K
• ISSN：1932-7455

文摘

Two new [1,2,5]thiadiazolo[3,4-c]pyridine-containing D-A-蟺鈥?i>A organic dyes (PT-1 and PT-2) have been designed and synthesized for utilization in dye-sensitized solar cells. PT-2 sensitizer, which was synthesized by incorporating the 4,4-bis(2-ethylhexyl)-4H-cyclopenta[1,2-b:5,4-b鈥瞉dithiophene moiety as an additional 蟺-bridge into the organic sensitizer PT-1, not only brings about significant changes in the absorption spectrum but also suppresses the charge recombination rate as compared to PT-1. Moreover, PT-2 exhibits an aesthetic blue color covering a broad spectral range into the NIR region. The incident-photon to electron-conversion efficiency of PT-2 shows an onset approaching 850 nm with power conversion efficiency of 6.7% fabricated when utilizing an iodide-based redox electrolyte. These results demonstrate that these [1,2,5]thiadiazolo[3,4-c]pyridine-based sensitizers are quite promising candidates to use for lowering the HOMO鈥揕UMO gap and shifting the spectral response toward the NIR.