Dye-Sensitized Solar Cells Based on Functionally Separated D-pi-A Dyes with 2-Cyanopyridine as an Electron-Accepting and Anchoring Group

作者：Mao, Jiangyi; Wang, Dan; Liu, Shih-Hung; Hang, Yandi; Xu, Yaoyao; Zhang, Qiong; Wu, Wenjun; Chou, Pi-Tai^*; Hua, Jianli

来源：Asian Journal of Organic Chemistry, 2014, 3(2): 153-160.

DOI：10.1002/ajoc.201300178

• OPEN-CIRCUIT VOLTAGE
• HIGHLY EFFICIENT
• FLUORESCENT DYES
• PYRIDINE-RING
• ORGANIC-DYES
• CHAIN
• TIO2
• PERFORMANCE
• PORPHYRINS
• OXIDES

<jats:title>Abstract</jats:title><jats:p>Three functionally separated donor‐π‐acceptor (<jats:sc>D</jats:sc>‐π‐A) sensitizers <jats:bold>CP</jats:bold>‐<jats:bold>I</jats:bold>–<jats:bold>III</jats:bold> with a cyano group as the electron‐accepting group and a pyridine as the anchoring group have been developed for dye‐sensitized solar cells (DSSCs). Significantly, the <jats:italic>J</jats:italic><jats:sub>sc</jats:sub> of <jats:bold>CP</jats:bold>‐<jats:bold>II</jats:bold>, which contains a benzo[1,2,5]thiadiazole moiety, is much higher than those of <jats:bold>CP</jats:bold>‐<jats:bold>I</jats:bold> and <jats:bold>CP</jats:bold>‐<jats:bold>III</jats:bold>, which contain quinoxaline and [1,2,5]thiadiazolo[3,4‐<jats:italic>c</jats:italic>]pyridine groups, respectively. This is not only a result of the good photon absorption, but also effective intramolecular charge transfer. The conversion efficiency (<jats:italic>η</jats:italic>) for <jats:bold>CP</jats:bold>‐<jats:bold>II</jats:bold>‐based DSSCs is 4.02 %, which is far better than that of <jats:bold>CP</jats:bold>‐<jats:bold>I</jats:bold> and <jats:bold>CP</jats:bold>‐<jats:bold>III</jats:bold>. Also, the <jats:italic>η</jats:italic> value for <jats:bold>CP</jats:bold>‐<jats:bold>II</jats:bold> is much higher than that for the reference dye <jats:bold>P</jats:bold>‐<jats:bold>II</jats:bold> with pyridine as anchoring group.</jats:p>

• 出版日期2014-2
• 单位华东理工大学