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Effect of heterocyclic nitrogen ionic liquid additives on the rate of backreaction in DSSCS: An electrochemical characterization
Journal of Science: Advanced Materials and Devices ( IF 7.382 ) Pub Date : 2021-06-05 , DOI: 10.1016/j.jsamd.2021.05.007
Larissa A. Santa-Cruz , Thiago A.S. Soares , Rhauane A. Galvão , Fabiele C. Tavares , Ingryd R.M. Araújo , Clarissa P. Frizzo , Marcos J.L. Santos , Brenno A.D. Neto , Giovanna Machado

The backreaction in dye-sensitized solar cells (DSSCs) was long ago recognized as one of the main causes of decreasing energy conversion efficiency. Hence, many different approaches have been attempted to reduce the backreaction. In the present work, we use nitrogen additives in the electrolyte to reduce the backreaction with TiO2 and I3. Intensity-modulated photocurrent/photovoltage (IMPS/IMVS) and charge extraction (CE) techniques are used to obtain information on the dynamics of charge carriers in DSSCs assembled with and without nitrogen additives. The passivation process occurring on the nanoparticles, which is promoted by the additives, prevents recombination but does not change the electron transport time. Therefore, the description of transport and electron recombination kinetics in DSSCs is well established in this work with the emerging IMPS, IMVS, and CE techniques.



中文翻译:

杂环氮离子液体添加剂对 DSSCS 反应速率的影响:电化学表征

染料敏化太阳能电池 (DSSC) 中的逆反应很久以前就被认为是降低能量转换效率的主要原因之一。因此,已经尝试了许多不同的方法来减少反向反应。在目前的工作中,我们在电解液中使用氮添加剂来减少与 TiO 2和 I 3 -的反向反应-. 强度调制光电流/光电压 (IMPS/IMVS) 和电荷提取 (CE) 技术用于获取有关使用和不使用氮添加剂组装的 DSSC 中电荷载流子动力学的信息。纳米颗粒上发生的钝化过程由添加剂促进,可防止复合但不会改变电子传输时间。因此,在这项工作中,利用新兴的 IMPS、IMVS 和 CE 技术,对 DSSC 中传输和电子重组动力学的描述已经很好地建立起来。

更新日期:2021-08-11
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