Badawy Safa A, Abdel-Latif Ehab, Elmorsy Mohamed R
Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt.
Department of Chemistry, Faculty of Science, New Mansoura University, New Mansoura, 35712, Egypt.
Sci Rep. 2024 Oct 30;14(1):26072. doi: 10.1038/s41598-024-75959-0.
This study presents a significant advancement in tandem dye-sensitized solar cells (T-DSSCs) through the strategic synthesis of novel triazatruxene (TAT) sensitizers MS-1 and MS-2. These organic sensitizers demonstrate exceptional light-harvesting capacity and overall performance, pushing the boundaries of power conversion efficiency (PCE) in DSSCs. The MS-1-based DSSCs achieved an impressive PCE of 12.81%, while MS-2 sensitizers reached a notable 10.92%. These efficiencies represent significant improvements over the conventional N719 dye (7.60%), demonstrating the potential of metal-free organic sensitizers in DSSC technology. The key to these noteworthy results lies in the molecular design of the organic sensitizers. The triazatruxene donor segment in the MS-1 and MS-2 dyes, featuring a rigid structure and efficient intramolecular charge transfer (ICT), proved to be a game-changer for photovoltaic properties. Building on these results, we explored an innovative parallel tandem cell (PT-DSSC) configuration. By connecting separate cells containing N719 and MS-1 sensitizers, we achieved a record efficiency of 12.89% with enhanced short-circuit current density (J) and open-circuit voltage (V)compared to single-dye cells. This study highlights the potential of molecular engineering in organic sensitizers and device optimization to enhance DSSC performance, paving the way for further advancements in solar cell technology.
本研究通过新型三氮杂苝（TAT）敏化剂MS-1和MS-2的策略性合成，在串联染料敏化太阳能电池（T-DSSC）方面取得了重大进展。这些有机敏化剂展现出卓越的光捕获能力和整体性能，突破了染料敏化太阳能电池（DSSC）的功率转换效率（PCE）极限。基于MS-1的DSSC实现了令人印象深刻的12.81%的PCE，而MS-2敏化剂则达到了显著的10.92%。这些效率相较于传统的N719染料（7.60%）有了显著提高，证明了无金属有机敏化剂在DSSC技术中的潜力。这些显著成果的关键在于有机敏化剂的分子设计。MS-1和MS-2染料中的三氮杂苝供体片段具有刚性结构和高效的分子内电荷转移（ICT），被证明是光伏性能的一个变革因素。基于这些结果，我们探索了一种创新的并联串联电池（PT-DSSC）配置。通过连接包含N719和MS-1敏化剂的独立电池，我们实现了创纪录的12.89%的效率，与单染料电池相比，短路电流密度（J）和开路电压（V）都有所提高。本研究突出了有机敏化剂分子工程和器件优化在提高DSSC性能方面的潜力，为太阳能电池技术的进一步发展铺平了道路。
