Light trapping and reflection control with tilted pyramids and grooves

1 January 1988

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 713-716 vol.1
https://doi.org/10.1109/pvsc.1988.105795

Abstract

Texturing the surface of a cell to produce crystallographically defined pyramids and grooves is a well-established technique for improving the performance of crystalline solar cells. The double bounce experienced by reflected light with such textured surfaces reduces reflection to low levels even without antireflection coatings. A simply implemented approach based on tilting these geometrical features is shown to produce quadruple bounces in encapsulated cells. This reduces reflection from the cell surface from 3-4% without antireflection coatings to below 0.2%. Tilting of the geometrical features allows very effective light trapping within the cell when combined with a planar rear surface. The improved reflection properties are relevant to all cells which use texturing, regardless of their design.<>

Keywords

This publication has 2 references indexed in Scilit:

Light trapping properties of pyramidally textured surfaces
Journal of Applied Physics, 1987
27.5-percent silicon concentrator solar cells
IEEE Electron Device Letters, 1986