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Large area 17.3% high-efficiency screen-printed solar cells on a 90-μm-thick epitaxial silicon (epi-Si) active layer with a porous silicon (PSI) back reflector were fabricated using a 182-cm2 epitaxial wafer equivalent (EpiWE) structure and a standard industrial process. The PSI layer was studied and optimized to serve as an efficient back reflector in the finished device. An effective back surface...
Screen printed low to medium concentrator silicon solar cells have potential to drive down the cost of PV since it replaces expensive semiconductor material by less expensive optics while maintaining high efficiency. However, the conventional screen-printed finger width is generally ≥100µm which limits the efficiency under higher concentration. In this paper, we report on the application of 50µm wide...
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