Realization of a near-perfect antireflection coating for silicon solar energy utilization
2008; Optica Publishing Group; Volume: 33; Issue: 21 Linguagem: Inglês
10.1364/ol.33.002527
ISSN1539-4794
AutoresMei-Ling Kuo, David J. Poxson, Yong‐Sung Kim, Frank W. Mont, Jong Kyu Kim, E. Fred Schubert, Shawn-Yu Lin,
Tópico(s)solar cell performance optimization
ResumoTo harness the full spectrum of solar energy, Fresnel reflection at the surface of a solar cell must be eliminated over the entire solar spectrum and at all angles. Here, we show that a multilayer nanostructure having a graded-index profile, as predicted by theory [J. Opt. Soc. Am. 66, 515 (1976); Appl. Opt. 46, 6533 (2007)], can accomplish a near-perfect transmission of all-color of sunlight. An ultralow total reflectance of 1%-6% has been achieved over a broad spectrum, lambda = 400 to 1600 nm, and a wide range of angles of incidence, theta = 0 degrees-60 degrees . The measured angle- and wavelength-averaged total reflectance of 3.79% is the smallest ever reported in the literature, to our knowledge.
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