Solar Cells: Pillars of Light

IME researchers have investigated and modeled the impact of key factors on the electrical performance of Si nanopillar array surface textured thin-film based solar cells. Conventional solar cells are made from expensive high quality bulk Si wafer to attain high power conversion efficiency (PCE). Results from this study validated the use of nanopillar arrays as a viable light trapping scheme using low-grade Si thin-films to make efficient and low-cost solar cells that can reach 18% in PCE (vs 10.5% reported in Si thin-film based solar cells). Findings from this work provide a practical guideline to design high-efficiency SiNP-textured thin-film solar cells.