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We investigate a spectrum-splitting design, the polyhedral specular reflector, for an ultra-high efficiency module (>50%). The design employs a series of multilayer dielectric stack filters to divide the incident spectrum onto seven independently connected subcells. We optimized the geometry and components of the design through coupled wave-optics, device physics, electrical circuit, and ray tracing...
We discuss ‘full spectrum’ photovoltaic modules that leverage low-cost III-V compound semiconductor cells, efficient optics and unconventional fabrication/assembly methods, and discuss advances in photoelectrochemical water-splitting with high efficiency.
High confinement in plasmonic waveguides usually comes along with high loss. We present experiments on a new approach, which allows to tune adiabatically between high confinement and low loss waveguides, connected to optical Yagi-style antennas.
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