title: Performance enhancement of organic photovoltaic devices enabled by Au nanoarrows inducing surface plasmonic resonance effect.
abstract: 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.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, Jilin University, College of Electronic Science and Engineering, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn.
authors.forename: Shujun
authors.initials: S
authors.lastname: Li
authors.forename: Zhiqi
authors.initials: Z
authors.lastname: Li
authors.forename: Xinyuan
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Zhang
authors.forename: Chunyu
authors.initials: C
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Shen
authors.forename: Wenbin
authors.initials: W
authors.lastname: Guo
authors.forename: Shengping
authors.initials: S
authors.lastname: Ruan