A series of four new asymmetric di-anchoring dyes is reported, containing identical π spacer, acceptor, phenothiazine (PTZ) and arylamine (Ar_nN) moieties in the donor part but different bridging moieties (L): N–C bond, C–C bond, phenylamine and triphenylamine. Spectral, electrochemical, and photovoltaic experiments and density functional theory calculations were performed to understand the bridging moiety influence on the performance of A–π–Ar_nN–L–PTZ–π–A dyes. Among these four dyes, the dye incorporating the triphenylamine bridging unit shows the best photovoltaic performance: an open-circuit voltage (V_oc) of 0.72 V, a short-circuit photocurrent density (J_sc) of 11.57 mA cm⁻², and a fill factor (FF) of 0.63, corresponding to an overall conversion efficiency of 5.21% under a simulated AM 1.5 G illumination condition. The results indicated that the presence of the biaryl torsion at the bridging position effectively improved the photovoltaic performance of the dye-sensitized solar cells.

报道了一系列四种新的不对称双锚定染料，在供体部分包含相同的π间隔基，受体，吩噻嗪（PTZ）和芳胺（Ar _n N）部分，但桥联部分（L）不同：NC键，C -C键，苯胺和三苯胺。进行了光谱，电化学和光伏实验以及密度泛函理论计算，以了解桥接部分对A–π–Ar _n N–L–PTZ–π–A染料性能的影响。在这四种染料中，结合了三苯胺桥联单元的染料显示出最佳的光伏性能：0.72 V的开路电压（V _oc），11.57 mA cm ^-2的短路光电流密度（J _sc），填充因子（FF）为0.63，对应于模拟AM 1.5 G照明条件下的总转换效率为5.21％。结果表明，在桥联位置存在联芳基扭转有效地改善了染料敏化太阳能电池的光伏性能。