Li Shujun, Li Zhiqi, Zhang Xinyuan, Zhang Zhihui, Liu Chunyu, Shen Liang, Guo Wenbin, Ruan Shengping
State Key Laboratory on Integrated Optoelectronics, Jilin University, College of Electronic Science and Engineering, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
Phys Chem Chem Phys. 2016 Sep 21;18(35):24285-9. doi: 10.1039/c6cp04302j. Epub 2016 Aug 17.
The surface plasmon resonance (SPR) effect of metal nanoparticles is widely employed in organic solar cells to enhance device performance. However, the light-harvesting improvement is highly dependent on the shape of the metal nanoparticles. In this study, the significantly enhanced performance upon incorporation of Au nanoarrows in solution-processed organic photovoltaic devices is demonstrated. Incorporating Au nanoarrows into the ZnO cathode buffer layer results in superior broadband optical absorption improvement and a power conversion efficiency of 7.82% is realized with a 27.3% enhancement compared with the control device. The experimental and theoretical results indicate that the introduction of Au nanoarrows not only increases optical trapping by the SPR effect but also facilitates exciton generation, dissociation, and charge transport inside the thin film device.
金属纳米颗粒的表面等离子体共振（SPR）效应被广泛应用于有机太阳能电池中以提高器件性能。然而，光捕获的改善高度依赖于金属纳米颗粒的形状。在本研究中，展示了在溶液处理的有机光伏器件中掺入金纳米箭头后性能的显著增强。将金纳米箭头掺入ZnO阴极缓冲层可实现卓越的宽带光吸收改善，并且与对照器件相比，实现了7.82%的功率转换效率，提高了27.3%。实验和理论结果表明，金纳米箭头的引入不仅通过SPR效应增加了光捕获，还促进了薄膜器件内部的激子产生、解离和电荷传输。
