A new method to disperse CdS quantum dot-sensitized TiO2 nanotube arrays into P3HT:PCBM layer for the improvement of efficiency of inverted polymer solar cells.
A new method to disperse CdS quantum dot-sensitized TiO2 nanotube arrays into P3HT:PCBM layer for the improvement of efficiency of inverted polymer solar cells.
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DOI：
10.1186/1556-276x-9-240
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发表时间：
2014
影响因子：
--
通讯作者：
Zhang W
中科院分区：
文献类型：
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作者：
Li F;Chen C;Tan F;Yue G;Shen L;Zhang W
我们报道了在聚3-己基噻吩和[6，6]-苯基-C61-丁酸甲酯（P3 HT：PCBM）层中分散CdS量子点（QD）敏化的TiO 2纳米管阵列（TNT）可以提高ITO/nc-TiO 2/P3 HT：PCBM/MoO 3/Ag倒置聚合物太阳能电池（PSC）的效率。通过化学浴沉积法将CdS量子点沉积在TNT上。实验结果表明，CdS量子点敏化的TNTs（CdS/TNTs）不仅增加了P3 HT：PCBM层的光吸收，而且减少了P3 HT：PCBM层中的电荷复合。器件性能的依赖性上的CdS的沉积周期的TNTs进行了研究。在TNTs上沉积20次CdS的倒置PSC实现了3.52%的高功率转换效率（PCE），与没有CdS/TNTs的ITO/nc-TiO 2/P3 HT：PCBM/MoO 3/Ag器件相比，其显示出34%的增加。提高的效率归因于提高的光吸收率和减少的有源层中的电荷复合。
We report that the efficiency of ITO/nc-TiO2/P3HT:PCBM/MoO3/Ag inverted polymer solar cells (PSCs) can be improved by dispersing CdS quantum dot (QD)-sensitized TiO2 nanotube arrays (TNTs) in poly (3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) layer. The CdS QDs are deposited on the TNTs by a chemical bath deposition method. The experimental results show that the CdS QD-sensitized TNTs (CdS/TNTs) do not only increase the light absorption of the P3HT:PCBM layer but also reduce the charge recombination in the P3HT:PCBM layer. The dependence of device performances on cycles of CdS deposition on the TNTs was investigated. A high power conversion efficiency (PCE) of 3.52% was achieved for the inverted PSCs with 20 cyclic depositions of CdS on TNTs, which showed a 34% increase compared to the ITO/nc-TiO2/P3HT:PCBM/MoO3/Ag device without the CdS/TNTs. The improved efficiency is attributed to the improved light absorbance and the reduced charge recombination in the active layer.