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Functionalized carboxylate deposition of triphenylamine-based organic dyes for efficient dye-sensitized solar cells

机译：三苯胺基有机染料的功能化羧酸盐沉积，用于有效的染料敏化太阳能电池

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The standard dip-coating dye-loading technique for dye-sensitized solar cells (DSSCs) remains essentially unchanged since modern DSSCs were introduced in 1991. This technique constitutes up to 80% of the DSSC fabrication time. Dip-coating of DSSC dyes not only costs time, but also generates a large amount of dye waste, necessitates use of organic solvents, requires sensitization under dark conditions, and often results in inefficient sensitization. Functionalized Carboxylate Deposition (FCD) was introduced as an alternative dye deposition technique, requiring only 2% of the fabrication time, eliminating the need for solvents, and significantly reducing dye waste. In this study, FCD was used to deposit two relatively large triphenylamine-based organic dyes (L1 and L2). These dyes were sublimated and deposited in <20 minutes via a customized FCD instrument using a vacuum of ～0.1 mTorr and temperatures ≤280 °C. FCD-based DSSCs showed better efficiency ( i.e. , 5.03% and 5.46% for L1 and L2 dyes, respectively) compared to dip-coating ( i.e. , 4.36% and 5.35% for L1 and L2, respectively) in a fraction of the deposition time. With multiple advantages over dip-coating, FCD was shown to be a viable alternative for future ultra-low cost DSSC production.
机译：自从1991年引入现代DSSC以来，用于染料敏化太阳能电池（DSSC）的标准浸涂染料加载技术基本上保持不变。该技术占DSSC制造时间的80％。 DSSC染料的浸涂不仅花费时间，而且会产生大量的染料浪费，必须使用有机溶剂，在黑暗条件下需要敏化，并且通常导致敏化效率低下。引入功能化的羧酸沉积（FCD）作为替代性的染料沉积技术，仅需要2％的制造时间，无需溶剂，并显着减少了染料浪费。在这项研究中，FCD用于沉积两种相对较大的基于三苯胺的有机染料（L1和L2）。将这些染料升华并通过定制的FCD仪器在不到20分钟的时间内使用〜0.1 mTorr的真空度和≤280°C的温度进行沉积。与浸涂相比，基于FCD的DSSC表现出更好的效率（即L1和L2染料分别为5.03％和5.46％）（即L1和L2分别为4.36％和5.35％） 。与浸涂相比，FCD具有多种优势，它被证明是未来超低成本DSSC生产的可行替代方案。

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