Zhan Yaohui, Zhao Jiupeng, Zhou Changhai, Alemayehu Muluneh, Li Yanpeng, Li Yao
Center for Composite Materials, Harbin Institute of Technology, Harbin, China.
Opt Express. 2012 May 7;20(10):11506-16. doi: 10.1364/OE.20.011506.
Single nanowire solar cells are a promising candidate as nanoelectronic power sources. Metallic cores were integrated in single nanowire solar cells, and the influence of the silver core on the absorption efficiency and the short circuit current was studied in this work. A Full-wave Vectorial Finite Element Method approach was used to rigorously solve Maxwell's equations in two dimensions. The photon absorption in solar cells was modulated delicately to achieve higher absorption efficiencies and short circuit currents, by tuning the core size and radius of nanowire solar cells. The light trapping stemmed mainly from the localized surface plasmons and also from Mie scattering and leaky mode resonances. The results showed that an enhancement of 16.6% in the photocurrent could be achieved by α-Si nanowire solar cells with the proper core size and filling-ratio compared to that without silver core.
单纳米线太阳能电池作为纳米电子电源是一种很有前景的候选者。在单纳米线太阳能电池中集成了金属芯，并在本工作中研究了银芯对吸收效率和短路电流的影响。采用全波矢量有限元方法在二维中严格求解麦克斯韦方程组。通过调整纳米线太阳能电池的芯尺寸和半径，精细地调制太阳能电池中的光子吸收，以实现更高的吸收效率和短路电流。光捕获主要源于局域表面等离子体激元，也源于米氏散射和泄漏模共振。结果表明，与没有银芯的α-Si纳米线太阳能电池相比，具有合适芯尺寸和填充率的α-Si纳米线太阳能电池可使光电流提高16.6%。
