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2 November 2016 High performance solar cells: It's all about the optics (Conference Presentation)
Eli Yablonovitch
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Proceedings Volume 9955, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIII—Commemorating the 50th Anniversary of Nonimaging Optics; 995506 (2016) https://doi.org/10.1117/12.2238763
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States
Abstract
For solar cells at 25%, good electron-hole transport is already a given. Further improvements of efficiency above 25% are all about the photon management! Our mantra is: “A good solar cell has to be a good LED; A great solar cell has to be a great LED! It has been found that thin-film cells are more efficient than the best wafer cells. Even more counter-intuitively, solar cells perform best when some of the solar photons are returned as external fluorescence. That is, the external luminescence yield ext, should be maximized. Good external fluorescence produces record output voltage.
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Eli Yablonovitch "High performance solar cells: It's all about the optics (Conference Presentation)", Proc. SPIE 9955, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIII—Commemorating the 50th Anniversary of Nonimaging Optics, 995506 (2 November 2016); https://doi.org/10.1117/12.2238763
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KEYWORDS
Solar cells
Luminescence
Light emitting diodes
Nonimaging optics
Semiconducting wafers
Thin films
Current controlled current source
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