Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom.
Sci Rep. 2017 Aug 9;7(1):7696. doi: 10.1038/s41598-017-08077-9.
To guide the design of plasmonic solar cells, theoretical investigation of core (metal)-shell (dielectric) nanoparticles for light absorption enhancement in thin film Si solar cells is performed. In contrast to the reported simulations and experimental results that rear-located surface plasmon on bare metallic nanoparticles is preferred, the core-shell nanoparticles demonstrate better performance when surface plasmon is located in front of a solar cell. This has been attributed to the enhanced forward scattering with vanishing backward scattering preserved over a wide spectral range in core-shell nanoparticles. This work provides a concept to achieve enhanced forward scattering with weakened backward scattering in plasmonic thin film solar cells.
为了指导等离子体太阳能电池的设计，对用于提高薄膜硅太阳能电池光吸收的核（金属）壳（电介质）纳米粒子进行了理论研究。与报道的模拟和实验结果相反，人们更喜欢位于裸露金属纳米粒子背面的表面等离子体，而核壳纳米粒子在表面等离子体位于太阳能电池前面时表现出更好的性能。这归因于在宽光谱范围内，核壳纳米粒子中增强的前向散射伴随着几乎为零的后向散射。这项工作为在等离子体薄膜太阳能电池中实现增强的前向散射和减弱的后向散射提供了一个概念。
