AbstractIn dye‐sensitized solar cells (DSSCs), flat planar dyes (e. g., highly light‐harvesting porphyrins and corroles) with multiple anchoring groups are known to adopt a horizontal orientation on TiO2 through the multiple binding to TiO2. Due to the strong electronic coupling between the dye and TiO2, fast charge recombination between the oxidized dye and an electron in TiO2 occurs, lowering the power conversion efficiency (η). To overcome this situation, an additional donor moiety can be placed on top of the planar dye on TiO2 to slow down the undesirable charge recombination. Here we report the synthesis and photovoltaic properties of a triarylamine (TAA)‐tethered gold(III) corrole (TAA‐AuCor). The DSSC with TAA‐AuCor using iodine redox shuttle exhibited the highest η‐value among corrole‐based DSSCs, which is much higher than that with the reference AuCor. The transient absorption spectroscopies clearly demonstrated that fast electron transfer from the TAA moiety to the corrole radical cation in TAA‐AuCor competes with the undesirable charge recombination to generate long‐lived charge separated state TAA⋅+‐Cor/TiO2⋅− efficiently. Consequently, the introduction of the TAA moiety enhanced the η‐value remarkably, demonstrating the usefulness of our new concept to manipulate charge‐separated states toward highly efficient DSSCs.
 
                                    摘要 在
染料敏化太阳能电池(DSSC)中,具有多个锚定基团的平面
染料(如高采光
卟啉和腐蚀剂)会通过与 TiO2 的多重结合在 TiO2 上形成
水平取向。由于
染料和
二氧化钛之间的电子耦合很强,氧化的
染料和
二氧化钛中的电子之间会发生快速的电荷
重组,从而降低功率转换效率(η)。为了克服这种情况,可以在 TiO2 上的平面
染料顶部添加一个供体分子,以减缓不希望发生的电荷
重组。在此,我们报告了一种三芳基胺(
TAA)系
金(III)珊瑚(
TAA-AuCor)的合成和光伏特性。瞬态吸收光谱清楚地表明,电子从 
TAA 分子快速转移到 
TAA-AuCor 中的 corrole 自由基阳离子,与不希望发生的电荷
重组竞争,从而有效地生成长寿命的电荷分离态 
TAA⋅+-Cor/TiO2⋅- 。因此,
TAA分子的引入显著提高了η值,证明了我们的新概念在操纵电荷分离态实现高效DSSC方面的实用性。