2-D Periodic and Random-on-Periodic Front Textures for Tandem Thin-Film Silicon Solar Cells

摘要: We evaluate the performance of thin-film silicon micromorph tandem solar cells deposited on transparent superstrates with embossed micrometer-scale 2-D gratings. Once coated a thin conductive layer hydrogenated indium oxide, textured can be used as periodic single-texture front electrodes. Combining these almost loss-free electrodes highly transparent, random self-textured zinc oxide (with thickness 1 um) by low-pressure chemical vapor deposition (LPCVD), we obtain double-texture The potential both single- and is estimated varying illumination spectrum simulator, thereby assessing maximum efficiency under optimal current-matching conditions. Our results demonstrate complementary roles gratings LPCVD-ZnO layers in double textures: Cell efficiencies high our state-of-the-art 2.3-um-thick electrode are obtained significantly reduced ZnO thicknesses. Additionally, show that equivalent also within reach single textures if proper cell configuration applied.