Two novel heteroleptic brominated-TPA-stilbazole based Ru (II)-sensitizers denoted as SD-11 and SD-11 mono were designed, synthesized and characterized for dye-sensitized solar cells (DSCs) in comparison to benchmarked dye N719. The molecular structures of SD-11 and SD-11 mono were confirmed using FTIR, ¹H-NMR and mass spectrometry. The aim was to systematically study the effect of mono (SD-11 mono) versus bis-brominated-TPA moiety (SD-11) on molar absorptivity, ground and excited state oxidation potentials, light harvesting efficiency (LHE), incident-photon-to-current conversion efficiency (IPCE), short-circuit photocurrent density (Jsc), and total solar-to-electric conversion efficiency (η) for DSCs. Optical results revealed that SD-11 and SD-11 mono have higher molar extinction coefficients, narrower HOMO−LUMO gaps compared to N719. Hence, it was found that SD-11 exhibited remarkably greater Jsc than SD-11 mono and interestingly showed comparable extinction coefficients. However, in optimized conditions, SD-11 showed a higher Jsc of 22.1 mA cm⁻², Voc of 0.68 V with (% η) of 8.7 compared to Jsc of 14.4 mA cm⁻², Voc of 0.63 V and with (% η) of 5.8 for SD-11 mono whereas N719 attained a Jsc of 15.9 mA cm⁻², Voc of 0.74 V with (% η) of 7.6 under the same experimental device conditions. It was concluded that SD-11 outperformed SD-11 mono in photovoltaic performance when anchored on TiO₂, owing to better light-harvesting ability. These results clearly demonstrated that the enhancement of the photovoltaic performance in SD-11 can be attributed to the presence of more number of –Br group.

与基准染料N719相比，针对染料敏化太阳能电池（DSC）设计，合成和表征了两种新型杂合溴化TPA-噻唑基钌（II）敏化剂，分别表示为SD-11和SD-11 mono。使用FTIR，¹ H-NMR和质谱确认了SD-11和SD-11 mono的分子结构。目的是系统研究单（SD-11 mono）与双溴TPA部分（SD-11）对摩尔吸收率，基态和激发态氧化电势，光收集效率（LHE），入射光子-的影响电流转换效率（IPCE），短路光电流密度（J sc）以及总的太阳能光电转换效率（η）的DSC。光学结果表明，与N719相比，SD-11和SD-11 mono具有更高的摩尔消光系数，更窄的HOMO-LUMO间隙。因此，发现SD-11显示出比SD- 11mono更大的J sc，并且有趣地显示出相当的消光系数。但是，在最佳条件下，SD-11显示出更高的J sc为22.1 mA cm ^-2，V oc为0.68 V，（％η）为8.7，而J sc为14.4 mA cm ^-2，V oc为0.63 V，SD-11单声道的（％η）为5.8，而N719的J sc为15.9 mA cm ^-2，V在相同的实验设备条件下，OC值为0.74 V，（％η）为7.6。结论是，由于具有更好的集光能力，当固定在TiO _2上时，SD-11在光伏性能方面优于SD-11 mono 。这些结果清楚地表明，SD-11中光伏性能的增强可以归因于更多数量的-Br基团的存在。