Pentafluorosulfanyl-functionalised BODIPY push-pull dyes for p-type dye-sensitized solar cells.

Pentafluorosulfanyl-functionalised BODIPY push-pull dyes for p-type dye-sensitized solar cells.
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DOI:
10.1039/d2se00977c
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发表时间:
2023-03-14
影响因子:
5.6
通讯作者:
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中科院分区:
材料科学3区
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我们报道了一种基于推挽BODIPY的染料,在介观位置上用电负性SF 5基团官能化,用于串联染料敏化太阳能电池(DSSC)中的光电阴极。推拉特性增强了从介孔NiO阴极表面向氧化还原介体的电荷转移。使用Knoevenagel缩合反应来引入羧酸以通过苯乙烯基连接体将染料锚到氧化物表面,苯乙烯基连接体增加分子中的共轭并将吸收转移到红色。室温合成和高产率使染料有望大规模生产。将该染料应用于p-DSSC中,得到功率转换效率(0.066%)、3.84 mA cm-2的短路光电流(JSC)、58 mV的开路电压(VOC)和30%的填充因子。我们报道了一种基于推挽BODIPY的染料,在介观位置上用电负性SF 5基团官能化,用于串联染料敏化太阳能电池(DSSC)中的光电阴极。
We report a push–pull BODIPY-based dye functionalised with an electronegative SF5 group at the meso position for applications in photocathodes in tandem dye-sensitized solar cells (DSSCs). The push–pull character enhances charge-transfer from the mesoporous NiO cathode surface towards the redox mediator. A Knoevenagel condensation reaction was used to introduce the carboxylic acid to anchor the dye to the oxide surface, via a styryl linker which increases the conjugation in the molecule and shifts the absorption to the red. The room-temperature synthesis and high yields, make the dye promising for manufacture on a large scale. The dye was applied in p-DSSCs giving a power conversion efficiency (0.066%), a short circuit photocurrent (JSC) of 3.84 mA cm−2, open circuit voltage (VOC) of 58 mV and fill factor of 30%. We report a push–pull BODIPY-based dye functionalised with an electronegative SF5 group at the meso position for applications in photocathodes in tandem dye-sensitized solar cells (DSSCs).
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