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Transforming the cost of solar-to-electrical energy conversion: Integrating thin-film GaAs solar cells with non-tracking mini-concentrators 被引量:2
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作者 Kyusang Lee Jaesang Lee +1 位作者 Bryan A Mazor stephen r forrest 《Light(Science & Applications)》 SCIE EI CAS CSCD 2015年第1期367-373,共7页
Practical solar energy solutions must not only reduce the cost of the module,but also address the substantial balance of system costs.Here,we demonstrate a counter-intuitive approach based on gallium arsenide solar ce... Practical solar energy solutions must not only reduce the cost of the module,but also address the substantial balance of system costs.Here,we demonstrate a counter-intuitive approach based on gallium arsenide solar cells that can achieve extremely low-cost solar energy conversion with an estimated cost of only 3% that of conventional gallium arsenide solar cells using an accelerated,non-destructive epitaxial lift-off wafer recycling process along with a lightweight,thermoformed plastic,truncated mini-compound parabolic concentrator that avoids the need for active solar tracking.Using solar cell/concentrator assemblies whose orientations are adjusted only a few times per year,the annual energy harvesting is increased by 2.8 times compared with planar solar cells without solar tracking.These results represent a potentially drastic cost reduction in both the module and the balance of system costs compared with heavy,rigid conventional modules and trackers that are subject to wind loading damage and high installation costs. 展开更多
关键词 CONCENTRATOR cost per Watt epitaxial lift-off plastic substrate thin-film GaAs solar cell
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An electrophosphorescent organic light emitting concentrator
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作者 Jaesang Lee Michael Slootsky +2 位作者 Kyusang Lee Yifan Zhang stephen r forrest 《Light(Science & Applications)》 SCIE EI CAS 2014年第1期161-165,共5页
We demonstrate threefold directional light concentration from an organic light-emitting diode luminaire for use in spot lighting and other applications where high intensity illumination is required.The concentrating l... We demonstrate threefold directional light concentration from an organic light-emitting diode luminaire for use in spot lighting and other applications where high intensity illumination is required.The concentrating luminaire comprises four triangular,large-area green electrophosphorescent organic light emitting diodes(PHOLEDs)deposited on plastic substrates and assembled into a pyramidal structure with an open base that serves as the light exit aperture.The PHOLED surfaces are highly reflective to direct the emission from the devices to the aperture independent of the original emission position within the pyramid.The far-field intensity profile of the concentrator has a‘batwing’distribution that meets the requirements for general lighting for uniform illumination of planar surfaces. 展开更多
关键词 large-area PHOLED luminaire PHOSPHORESCENCE plastic substrates
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