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photovoltaic technologies beyond the horizon: optical rectenna solar cell, final report (in English)
National Renewable Energy Laboratory (Nr
(Author)
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Bibliogov
· Paperback
photovoltaic technologies beyond the horizon: optical rectenna solar cell, final report (in English) - National Renewable Energy Laboratory (Nr
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Synopsis "photovoltaic technologies beyond the horizon: optical rectenna solar cell, final report (in English)"
ITN Energy Systems is developing next-generation solar cells based on the concepts of an optical rectenna. ITN's optical rectenna consists of two key elements: 1) an optical antenna to efficiently absorb the incident solar radiation, and 2) a high-frequency metal-insulator-metal (MIM) tunneling diode that rectifies the AC field across the antenna, providing DC power to an external load. The combination of a rectifying diode at the feedpoints of a receiving antenna is often referred to as a rectenna. Rectennas were originally proposed in the 1960s for power transmission by radio waves for remote powering of aircraft for surveillance or communications platforms. Conversion efficiencies greater than 85% have been demonstrated at radio frequencies (efficiency defined as DC power generated divided by RF power incident on the device). Later, concepts were proposed to extend the rectennas into the IR and optical region of the electromagnetic spectrum for use as energy collection devices (optical rectennas).
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