Effect of structural modification on the performances of phenothiazine-dye sensitized solar cells
作者:Xuxu Liu、Jun Long、Guo Wang、Yong Pei、Bin Zhao、Songting Tan
DOI:10.1016/j.dyepig.2015.05.012
日期:2015.10
photocurrent density (Jsc) of the devices are decreased due to the blocked electron transfer, so the DSSC device based on DX2 only obtains the PCE of 3.43%. Furthermore, a triphenylamine (TPA) unit with high electron-donating ability is joined onto the nitrogen atom of phenothiazine donor in DX3, which enhances the electron injection efficiency and reduces the dye aggregation. Thus, the Jsc is improved, resulting
设计并合成了三种含吩噻嗪的新型染料DX1,DX2和DX3,用于染料敏化太阳能电池(DSSC)。三种染料的光物理,电化学和光伏性质已得到系统地研究。结果表明,具有0.5 mM鹅去氧胆酸(CDCA)的基于DX1的DSSC可获得5.69%的功率转换效率(PCE)。当将另一个缺电子的苯并噻二唑(BT)单元引入染料DX2和DX3的分子结构中时,吸收光谱将变宽。但是短路光电流密度(J sc由于电子传输受阻,器件的)降低,因此基于DX2的DSSC器件仅获得3.43%的PCE。此外,在DX3的吩噻嗪供体的氮原子上连接了具有高供电子能力的三苯胺(TPA)单元,从而提高了电子注入效率并减少了染料聚集。因此,改善了J sc,与基于DX2的染料相比,基于DX3的染料的PCE更高,为4.41%。