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Based on a perfectly flat gallium arsenide solar cell, we show that it is possible to modify the flow of light and enhance the absorption without modifying the active material structure or degrading its electrical properties. The sunlight couples into confined resonant modes formed by a periodic arrangement of dielectric nanospheres above the solar cell. The incoupling element is lossless and, thus,...
Light trapping is a critical requirement in thin film photovoltaics, and dielectric texturing is a viable method to induce light trapping, but thin film device quality often suffers upon direct texturing of the semiconductor active material. Thus it is desirable to develop a design method in which textured dielectric layers provide for light trapping on smooth planar thin film cells. We propose here...
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