Molecular Engineering of Push-Pull Porphyrin Dyes for Highly Efficient Dye-Sensitized Solar Cells: The Role of Benzene Spacers
作者:Aswani Yella、Chi-Lun Mai、Shaik M. Zakeeruddin、Shu-Nung Chang、Chi-Hung Hsieh、Chen-Yu Yeh、Michael Grätzel
DOI:10.1002/anie.201309343
日期:2014.3.10
Porphyrins have drawn much attention as sensitizers owing to the large absorption coefficients of their Soret and Q bands in the visible region. In a donor and acceptor zinc porphyrin we applied a new strategy of introducing 2,1,3‐benzothiadiazole (BTD) as a π‐conjugated linker between the anchoring group and the porphyrin chromophore to broaden the absorption spectra to fill the valley between the
卟啉由于在可见光区的Soret和Q带的吸收系数大而作为敏化剂备受关注。在供体和受体卟啉锌中,我们采用了一种新的策略,即在锚定基团和卟啉发色团之间引入2,1,3-苯并噻二唑(BTD)作为π共轭连接体,以扩大吸收光谱,从而填充Soret之间的谷。和Q波段。通过这种新颖的方法,我们观察到在模拟的单日光照射下(AM1.5G,100 mW cm -2)的功率转换效率为12.75%。)。在这项研究中,我们显示了在BTD和卟啉锌之间引入苯基作为间隔基的重要性,以实现高功率转换效率。使用时间分辨荧光,瞬态光电流衰减和瞬态光电压衰减测量来确定电子注入动力学和光生电荷载流子的寿命。