期刊
JOURNAL OF OPTICS
卷 14, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/14/2/024006
关键词
solar cells; photonic crystals; nanowires; metamaterials
类别
资金
- Robert L and Audrey S Hancock Stanford Graduate Fellowship
- Stanford Terman Fellowship
- Robert N Noyce Family Faculty
- Hellman Faculty
Reducing reflection and transmission losses in photovoltaic devices is essential for realizing highly efficient power conversion. Here, we theoretically investigate arrays of radial junction silicon wires to determine the optimal geometry for maximized light absorption. Using a generalized rigorous coupled wave analysis, we calculate the scattering spectra of arrays of varying wire radii, length, and lattice filling factors. Near unity absorption, far exceeding that of conventional thin film devices, is calculated for a square array of 20 mu m long wires with radii of 200 nm and a filling fraction of 30%. These results suggest a potentially cost-effective route toward high efficiency solar cells.
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