In this study, the effect of incorporating multiwalled carbon nanotubes (MWCNTs) on the thermal stability of dye-sensitized solar cells (DSSCs) was investigated. Under identical measurement conditions (aging at 80 °C for 240 h), DSSCs based on a bare TiO2 anode presented a significant loss in photoconversion efficiency (PCE), dropping to 59 % of their initial value, whereas the DSSCs based on a TiO2 -MWCNT nanocomposite anode attained a promising thermal stability with only 20 % loss of PCE. This degradation of cell performance is mainly associated with a dramatic reduction in the short-circuit current density (Jsc ). To understand the mechanisms that underpin these changes in device performance under thermal stress, both types of cells were investigated using various techniques. The incorporation of MWCNTs could eliminate the formation of cracks and improve electron charge transfer. The results of this study indicate a promising new method to enhance the thermal stability of DSSCs using a nanocomposite anode made of one-dimensional carbon materials.

中文翻译：

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使用多壁碳纳米管实现染料敏化太阳能电池的长期热稳定性。

在这项研究中，研究了掺入多壁碳纳米管（MWCNTs）对染料敏化太阳能电池（DSSCs）的热稳定性的影响。在相同的测量条件下（在80°C下老化240小时），基于TiO2裸露阳极的DSSC的光转换效率（PCE）明显降低，降至其初始值的59％，而基于TiO2的DSSC- MWCNT纳米复合阳极获得了有希望的热稳定性，而PCE仅损失了20％。电池性能的下降主要与短路电流密度（Jsc）的急剧降低有关。为了了解在热应力下支撑这些器件性能变化的机制，我们使用各种技术对这两种类型的电池进行了研究。MWCNT的掺入可以消除裂纹的形成并改善电子电荷转移。这项研究的结果表明，使用由一维碳材料制成的纳米复合阳极增强DSSC的热稳定性的新方法很有希望。