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首页> 外文期刊>RSC Advances >Improvement of dye-sensitized solar cells performance through introducing different heterocyclic groups to triarylamine dyes
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Improvement of dye-sensitized solar cells performance through introducing different heterocyclic groups to triarylamine dyes

机译：通过将不同的杂环基引入三芳基胺染料来提高染料敏化太阳能电池的性能

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This paper focuses on the structure modification of triphenylamine dyes for efficient dye-sensitized solar cells (DSSCs). Three D-D-pi-A dyes (TTR1-3), with triphenylamine moiety and its derivatives as the electron donor, thiophene ring as the pi-bridge, and 2-(1,1-dicyanomethylene) rhodanine (DCRD) as the electron acceptor, were synthesized and fully characterized. Nanocrystalline TiO2-based DSSCs were fabricated using these dyes to investigate the effect of different donor groups introduced into triphenylamine on their photovoltaic performances. The overall power conversion efficiency (PCE) of DSSCs based on TTR1-3 with chenodeoxycholic acid (CDCA) coadsorbant are 5.20%, 5.71% and 6.30%, respectively, compared to 6.62% achieved with N719. Introduced heterocyclic group with alkyl lain into triphenylamine decreased dye absorbed amount but significantly improved the value of the open circuit voltage (V-oc) and the short-circuit photocurrent (J(sc)), which result from the fact that they can effectively suppress the charge recombination and prevent aggregation between adjacent molecules on TiO2. We also researched the effect of sensitization for single dyes on their photovoltaic performances. The PCEs of DSSCs soaked for 32 h increase slightly compared to those of DSSCs soaked for 16 h, which result from the adsorption quantity on the TiO2 surface. We found that, with soaking twice in 32 h, the J(sc) and V-oc were both obviously improved compared with soaking once in 32 h. These results provide a new approach for enhancing the photovoltaic performances of DSSCs based on single dye.
机译：本文重点研究三苯胺染料的结构修饰，以实现高效的染料敏化太阳能电池（DSSC）。三种DD-pi-A染料（TTR1-3），其中三苯胺部分及其衍生物为电子给体，噻吩环为pi桥，2-（1,1-二氰基亚甲基）罗丹宁（DCRD）为电子受体，进行了综合和充分表征。使用这些染料制备了基于TiO2的纳米晶DSSC，以研究引入三苯胺中的不同供体基团对其光电性能的影响。基于TTR1-3与鹅去氧胆酸（CDCA）共吸附剂的DSSC的总功率转换效率（PCE）分别为5.20％，5.71％和6.30％，而N719则为6.62％。在三苯胺中引入带有烷基的杂环基团可减少染料吸收量，但可显着提高开路电压（V-oc）和短路光电流（J（sc））的值，这是由于它们可以有效抑制电荷重组并防止TiO2上相邻分子之间的聚集。我们还研究了单一染料敏化对其光电性能的影响。与浸泡16h的DSSC相比，浸泡32h的DSSC的PCE略有增加，这是由于TiO2表面的吸附量所致。我们发现，与32小时均浸一次相比，在32 h中均浸两次，J（sc）和V-oc均明显改善。这些结果提供了一种新的方法来增强基于单一染料的DSSC的光伏性能。

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