Department of Materials Science and Engineering and California NanoSystems Institute, University of California Los Angeles, Los Angeles, California 90095, USA.
ACS Nano. 2011 Aug 23;5(8):6210-7. doi: 10.1021/nn202144b. Epub 2011 Jul 18.
We demonstrated plasmonic effects in an inverted tandem polymer solar cell configuration by blending Au nanoparticles (NPs) into the interconnecting layer (ICL) that connects two subcells. Experimental results showed this plasmonic enhanced ICL improves both the top and bottom subcells' efficiency simultaneously by enhancing optical absorption. The presence of Au NPs did not cause electrical characteristics to degrade within the tandem cell. As a result, a 20% improvement of power conversion efficiency has been attained by the light concentration of Au NPs via plasmonic near-field enhancement. The simulated near-field distribution and experimental Raman scattering investigation support our results of plasmonic induced enhancement in solar cell performance. Our finding shows a great potential of incorporating the plasmonic effect with conventional device structure in achieving highly efficient polymer solar cells.
我们通过将金纳米粒子 (Au NPs) 混入连接两个子电池的互连层 (ICL)，在倒接式串联聚合物太阳能电池结构中展示了等离子体效应。实验结果表明，这种等离子体增强 ICL 通过增强光吸收，同时提高了顶部和底部子电池的效率。Au NPs 的存在并没有导致串联电池的电特性恶化。因此，通过等离子体近场增强，Au NPs 的光集中实现了 20%的功率转换效率的提高。模拟的近场分布和实验拉曼散射研究支持了我们在太阳能电池性能中获得等离子体诱导增强的结果。我们的发现表明，在实现高效聚合物太阳能电池方面，将等离子体效应与传统器件结构相结合具有很大的潜力。
