Print Email Facebook Twitter Optical Design of Textured Thin-Film CIGS Solar Cells with Nearly-Invisible Nanowire Assisted Front Contacts Title Optical Design of Textured Thin-Film CIGS Solar Cells with Nearly-Invisible Nanowire Assisted Front Contacts Author van Deelen, J. Omar, A. Barink, M. Publication year 2017 Abstract The conductivity of transparent front contacts can be improved by patterned metallic nanowires, albeit at the cost of optical loss. The associated optical penalty can be strongly reduced by texturization of the cell stack. Remarkably, the nanowires themselves are not textured and not covered in our design. This was shown by optical modeling where the width of the nanowire, the texture height and the texture period were varied in order to obtain a good insight into the general trends. The optical performance can be improved dramatically as the reflection, which is the largest optical loss, can be reduced by 95% of the original value. The spectra reveal absorption in the Cu(In,Ga)Se2 (CIGS) layer of 95% and reflection below 2% over a large part of the spectrum. In essence, a virtually black CIGS cell stack can be achieved for textured cells with a metal nanogrid. Moreover, it turned out that the ratio between the width of the nanowire and the height of the texture is a critical parameter for optical losses. Subject Nano TechnologyTFT - Thin Film TechnologyTS - Technical SciencesMaterialsIndustrial InnovationSolar cellsNanogridThin-film solarFront contact To reference this document use: http://resolver.tudelft.nl/uuid:1d36a864-2c74-41cf-bb81-eab30230b496 DOI https://doi.org/10.3390/ma10040392 TNO identifier 756748 Publisher MDPI Source Materials, 10 (392) Document type article Files To receive the publication files, please send an e-mail request to TNO Library.