| 11. | The use of primary energy as a measure ignores conversion efficiency.
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| 12. | Under experimental conditions, microwave conversion efficiency was measured to be around 54 %.
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| 13. | Usually, the conversion efficiency is not high for the transmission-type metasurface.
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| 14. | This would lead to beam walk-off, which limits the nonlinear optical conversion efficiency.
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| 15. | That allows the achievement of the maximal energy conversion efficiency to the UV radiation.
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| 16. | These polymers have a large strain, elastic energy density, and high energy conversion efficiency.
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| 17. | Recently, in August 2014, First Solar announced a device with 21.1 % conversion efficiency.
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| 18. | Conversion efficiency falls very rapidly when the engine is operated outside of this band.
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| 19. | The best tandem cell I've seen had a conversion efficiency of about 30 %.
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| 20. | Solar cell energy conversion efficiencies for commercially available photovoltaics are around 14 22 %.
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