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This paper presents a novel principle for photovoltaic (PV) energy conversionusing surface acoustic waves (SAWs) in piezoelectric semiconductors. A SAWproduces a periodically modulated electric potential, which spatiallysegregates photoexcited electrons and holes to the maxima and minima of the SAWpotential. The moving SAW collectively transports the carriers with the speedof sound to the electrodes made of different materials, which extract electronsand holes separately and generate dc output. The proposed active design isexpected to have higher efficiency than passive designs of the existing PVdevices and to produce enough energy to sustain the SAW.

Novel method for photovoltaic energy conversion using surface acoustic waves in piezoelectric semiconductors