Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 66, Issue 1-4, Pages 37-44Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0927-0248(00)00156-2
Keywords
TMAH; anisotropic etching; reflectance; inverted pyramids; random pyramids
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Recently, TMAH has been widely studied due to its MOS compatibility, nontoxic, and good anisotropic etching characteristics. In this work, TMAH etching of Si was carried out at different temperatures (70 degreesC, 80 degreesC and 90 degreesC) and concentrations (5, 15 and 25 wt%). From a patterned Si wafer, inverted pyramids with smooth surface and sharp pyramid vertices were obtained. Uniform random pyramids were obtained from a bare Si wafer, and optimum reflectanceas low as 0.2% was obtained by near normal incident reflectivity measurement. (C) 2001 Elsevier Science B.V. All rights reserved.
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