Xu Weizhe, Tan Furui, Liu Xiansheng, Zhang Weifeng, Qu Shengchun, Wang Zhijie, Wang Zhanguo
Key Laboratory of Photovoltaic Technique, Department of Physics and Electronics, Henan University, Kaifeng, 475004, China.
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.
Nanoscale Res Lett. 2017 Dec;12(1):11. doi: 10.1186/s11671-016-1795-9. Epub 2017 Jan 5.
Constructing a highly efficient bulk-heterojunction is of critical importance to the hybrid organic/inorganic solar cells. Here in this work, we introduce a novel hybrid architecture containing P3HT nanowire and CdSe nanotetrapod as bicontinuous charge channels for holes and electrons, respectively. Compared to the traditionally applied P3HT molecules, the well crystallized P3HT nanowires qualify an enhanced light absorption at the long wavelength as well as strengthened charge carrier transport in the hybrid active layer. Accordingly, based on efficient dissociation of photogenerated excitons, the interpercolation of these two nano-building blocks allows a photovoltaic conversion efficiency of 1.7% in the hybrid solar cell, up to 42% enhancement compared to the reference solar cell with traditional P3HT molecules as electron donor. Our work provides a promising hybrid structure for efficient organic/inorganic bulk-heterojunction solar cells.
构建高效的体相异质结对于有机/无机混合太阳能电池至关重要。在本工作中，我们引入了一种新型混合结构，其中包含P3HT纳米线和CdSe纳米四脚架，分别作为空穴和电子的双连续电荷通道。与传统应用的P3HT分子相比，结晶良好的P3HT纳米线在长波长处具有增强的光吸收，并且在混合活性层中具有更强的电荷载流子传输能力。因此，基于光生激子的有效解离，这两种纳米结构单元的相互渗透使得混合太阳能电池的光电转换效率达到1.7%，与以传统P3HT分子作为电子供体的参比太阳能电池相比提高了42%。我们的工作为高效有机/无机体相异质结太阳能电池提供了一种有前景的混合结构。
