NDLI: Solution-processed spherical surface textures on amorphous silicon solar cells

Content Provider	IEEE Xplore Digital Library
Author	Wang, Y. Tummala, R. Guo, L.Q. Zhou, W. Tao, M.
Copyright Year	2009
Description	Author affiliation: Department of Electrical Engineering, University of Texas at Arlington, 76019, USA (Wang, Y.; Tummala, R.; Zhou, W.; Tao, M.) \|\| ZT Solar, Inc., 1120 South Freeway, Fort Worth, TX 76104, USA (Guo, L.Q.)
Abstract	Solution-processed spherical surface textures are demonstrated as a cost-effective antireflection coating on commercial amorphous Si solar cells. The spherical textures are formed with a monolayer of silica microspheres by convective coating, followed by a spin-on-glass film. It is found that the spherical texture reduces the reflectance of the cells in a broad wavelength range of 400 – 1,200 nm. More importantly, the spherical texture improves the efficiency of the cells at various incident angles from surface normal to at least 60°. The efficiency improves with incident angle to as high as 12% relative improvement, demonstrating its omni-directionality. I–V characterization reveals that the efficiency improvement is due to increased light coupling into the cells. A monolayer of silica microspheres alone reduces the efficiency by reducing the short-circuit current, and the spin-on-glass film alone reduces the efficiency by reducing the fill factor. This omni-directional surface texture represents a cost-effective antireflection approach for fixed-orientation solar panels and can be applied to both polycrystalline Si and thin-film solar cells.
Starting Page	001771
Ending Page	001774
File Size	2968759
Page Count	4
File Format	PDF
ISBN	9781424429493
ISSN	01608371
DOI	10.1109/PVSC.2009.5411470
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface texture Amorphous silicon Photovoltaic cells Coatings Silicon compounds Amorphous materials Optical films Reflectivity Optical coupling Semiconductor thin films
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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