Wide-Angle Antireflection Effect of Subwavelength Structures for Solar Cells

The angle-dependent reflectivity of several surface structures was analyzed and evaluated with the viewpoint of solar cell applications. Numerical analysis showed that a Si subwavelength structure (SWS) maintains a lower reflectivity at large incident angles than conventional light-trapping techniques such as a random pyramid texture, and that it can contribute to increasing the output power of solar cells under oblique irradiation. This wide-angle antireflection effect was demonstrated by fabricating test crystalline Si cells with several surface structures including a SWS and measuring their angle-dependent short-circuit current densities.

[1]  H. Dekkers,et al.  Silicon surface texturing by reactive ion etching , 2000 .

[2]  Kazuhiro Hane,et al.  100 nm period silicon antireflection structures fabricated using a porous alumina membrane mask , 2001 .

[3]  Hisao Kikuta,et al.  Optical Elements with Subwavelength Structured Surfaces , 2003 .

[4]  J. Gee,et al.  Characterization of random reactive ion etched-textured silicon solar cells , 2001 .

[5]  Zhaoning Yu,et al.  Fabrication of large area subwavelength antireflection structures on Si using trilayer resist nanoimprint lithography and liftoff , 2003 .

[6]  Yoshiaki Kanamori,et al.  Antireflective subwavelength structures on crystalline Si fabricated using directly formed anodic porous alumina masks , 2006 .

[7]  A. Mehta,et al.  High efficiency surface-emitting laser with subwavelength antireflection structure , 2005, IEEE Photonics Technology Letters.

[8]  K. Hane,et al.  High efficient light-emitting diodes with antireflection subwavelength gratings , 2002, IEEE Photonics Technology Letters.

[9]  M. Hutley,et al.  The Optical Properties of 'Moth Eye' Antireflection Surfaces , 1982 .

[10]  Yoon-Chang Kim,et al.  Nanohole-templated organic light-emitting diodes fabricated using laser-interfering lithography: moth-eye lighting. , 2005, Optics express.

[11]  Volker Wittwer,et al.  Antireflective submicrometer surface-relief gratings for solar applications , 1998 .

[12]  M. G. Moharam,et al.  Coupled-Wave Analysis Of Two-Dimensional Dielectric Gratings , 1988, Photonics West - Lasers and Applications in Science and Engineering.