Near-infrared unsymmetrical squaraine core-based sensitizers for co-sensitized high-photocurrent dye-sensitized solar cells
Near-infrared unsymmetrical squaraine core-based sensitizers for co-sensitized high-photocurrent dye-sensitized solar cells
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DOI：
10.1016/j.xcrp.2021.100701
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发表时间：
2021-12
影响因子：
8.9
通讯作者：
Jonathon Watson;Roberta R. Rodrigues;J. Delcamp
中科院分区：
文献类型：
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作者：
Jonathon Watson;Roberta R. Rodrigues;J. Delcamp
要改进染料敏化太阳能电池(DSC)，迫切需要增加近红外(NIR)光子到电能的转换。在这里，我们报道了两种具有不对称核的方酸染料(RR13和RR14)作为近红外染料在DSCS中的应用。这两种染料都有一个共轭的吲哚嗪给电子体和一个位于方酸核心相对侧的吲哚给电子体。通过吸收光谱、计算询问和电化学分析对染料进行了研究。在TiO2 In DSC器件上，强施主中氮中氮的使用导致了超过800 nm的近红外光-电转换。通过电流-电压曲线、入射光子-电流转换效率测量和阻抗谱对DSC器件进行了表征。经过共增感后的差示扫描量热仪优化，与商品有机染料(D35和Y123)互补的近红外吸收方酸染料获得了高达∼21 mA/cm2的光电流输出，PCE为9.4%。
Increased conversion of near-infrared (NIR) photons to electricity is needed to improve dye-sensitized solar cells (DSCs). Here, we report two squaraine dyes (RR13 and RR14) with unsymmetrical cores as NIR dyes in DSCs. Both dyes feature a conjugated indolizine donor with an indoline donor on the opposite side of the squaraine core. The dyes are studied via absorption spectroscopy, computational interrogation, and electrochemical analysis. The use of the strongly donating indolizine donor results in NIR photon-to-current conversion extending beyond 800 nm on TiO2in DSC devices. The DSC devices were characterized by current-voltage curves, incident photon-to-current conversion efficiency measurements, and electrical impedance spectroscopy. After co-sensitized DSC device optimizations, the NIR-absorbing squaraine dyes complemented with commercial organic dyes (D35 and Y123) gave a high photocurrent output of ∼21 mA/cm2with a PCE of 9.4%.