共吸附剂对染料敏化太阳能电池光伏性能的影响

Effect of Co-adsorbent on the Photovoltaic Performance of Dye-sensitized Solar Cells

利用市售联吡啶钌染料TG6为敏化剂制备染料敏化太阳能电池,引入鹅去氧胆酸(CDCA)为共吸附剂优化电池的光伏性能。实验结果表明,当TG6浓度为0.3 mmol/L,共吸附剂CDCA浓度为10 mmol/L时,以TG6敏化的太阳能电池的光电转换效率为4.64%,比未优化的同类电池提高了23%。电化学阻抗分析表明CDCA的引入,使染料/二氧化钛/电解液界面的回传电阻提升了近50%,有效提升了光生电子寿命,实现了抑制光生电子复合的目的。

Dye sensitized solar cells were fabricated with bipyridine ruthenium dye TG6 as photo sensitizer.The photovoltaic per-formance was further optimized using chenodeoxycholic acid(CDCA)as co-adsorbent during fabrication process.The results show than an optimized photoelectric conversion ef ciency of 4.64%,which is an increment of 23%with respect to homogeneous without co-adsorbent was achieved when the concentration of TG6 and CDCA was selected as 10 mmol/L and 0.3 mmol/L,respectively.The electrochemical impedance analysis showed that the charge resistance between dye/titanium dioxide/electrolyte interface is signi cant enhanced by nearly 50%with assistant of CDCA,thus effectively improved photogenerated electron lifetime and suppressed recombi-nation process.