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| ===== Silicon nanowire ===== | ===== Silicon nanowire ===== | ||
| - | In this application example we calculate the field distribution in a silicon nanowire based solar cell. | + | In this application example we calculate the field distribution in a silicon nanowires based solar cell. This is one of many advanced options how to construct better solar cells. As the solar cell performance highly depends on the local absorption of light, FDTD can be an useful tool for exploring in which regions of the sample the light gets absorbed. |
| - | + | The example shown here is related to structures related to Ref. 1. | |
| - | Aim of this numerical experiment was to calculate local absorption in different parts of a silicon nanowire (NW) based solar cell, with possibility of evaluating different geometrical parameters influence on cell performance. | + | |
| Two different models were constructed as shown on the right image. They always consist of several materials (TCO that was handled as ITO, amorphous silicon, crystalline silicon that was treated as Si 100 and eventually also a Sn nanoparticle on the top of the NW that was treated as perfect electric conductor). In model "A" a periodic array of structured is created using single NW/aSi/ITO column and periodic boundary conditions. This can be used to evaluate effect of column spacing films thicknesses, length or tilt on resulting structure performance. In model "B" 3x3 differently tilted columns are used as basic building block for periodic array construction. This is useful to estimate effects of random column orientation. In principle this could be expanded up to 7x7 array basic building block, however for even larger building blocks the computation would be too long and memory demanding. | Two different models were constructed as shown on the right image. They always consist of several materials (TCO that was handled as ITO, amorphous silicon, crystalline silicon that was treated as Si 100 and eventually also a Sn nanoparticle on the top of the NW that was treated as perfect electric conductor). In model "A" a periodic array of structured is created using single NW/aSi/ITO column and periodic boundary conditions. This can be used to evaluate effect of column spacing films thicknesses, length or tilt on resulting structure performance. In model "B" 3x3 differently tilted columns are used as basic building block for periodic array construction. This is useful to estimate effects of random column orientation. In principle this could be expanded up to 7x7 array basic building block, however for even larger building blocks the computation would be too long and memory demanding. | ||
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| The same model 3D view including better probe sketch is shown below: (left) geometry, (center) 400 nm illumination, (right) 600 nm illumination, | The same model 3D view including better probe sketch is shown below: (left) geometry, (center) 400 nm illumination, (right) 600 nm illumination, | ||
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| + | [1] A. Fejfar, M. Hývl, A. Vetushka, P. Pikna, Z. Hájková, M. Ledinský, J. Kočka, P. Klapetek, A. Marek, A. Mašková, J. Vyskočil, J. Merkel, C. Becker, T. Itoh, S. Misra, M. Foldyna, LW. Yu, P. R. I Cabarrocas, Correlative microscopy of radial junction nanowire solar cells using nanoindent position markers, Solar Energy Materials and Solar Cells 135 (2015) 106-112 | ||
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app/sinw.txt · Last modified: 2018/08/30 10:12 by pklapetek
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