Journal ArticleDOI
Solar Energy Conversion with Fluorescent Collectors
A. Goetzberger,W. Greubel +1 more
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TLDR
In this article, a new principle for solar energy conversion is proposed and evaluated theoretically, and the optical path length in a triangular collector is computed, which offers the advantage of separating the various fractions of light and converting them with solar cells with different bandgaps.Abstract:
A new principle for solar energy conversion is proposed and evaluated theoretically. Collection and concentration of direct and diffuse radiation is possible by the use of a stack of transparent sheets of material doped with fluorescent dyes. High efficiency of light collection can be achieved by light guiding and special design of collectors. The optical path length in a triangular collector is computed. In combination with solar cells this type of collector offers the advantage of separating the various fractions of light and converting them with solar cells with different bandgaps. Theoretical conversion efficiency under optimum conditions is 32% for a system with four semiconductors. Thermal energy conversion offers several advantages over conventional collectors: High temperature and efficiency even under weak illumination, separation of heat transport and radiation collection, low thermal mass. Thermal efficiency is computed to be between 42% and 60%. Very attractive appear hybrid systems for generation of thermal and electric energy. An estimate of the economics of electricity generation shows that due to the concentration costs can be much lower than possible today. With the use of only silicon cells the breakeven point of $0.5/W is almost reached. Practical difficulties to be solved are: Synthesis of dyes with stringent requirements, identification of plastic materials with high transparency and development of solar cells with higher bandgaps.read more
Citations
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Ultrathin Organic Films Grown by Organic Molecular Beam Deposition and Related Techniques.
TL;DR: This paper is a review of recent progress made in organic thin films grown in ultrahigh vacuum or using other vapor-phase deposition methods and describes the most important work which has been published in this field since the emergence of OMBD in the mid-1980s.
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Thirty Years of Luminescent Solar Concentrator Research: Solar Energy for the Built Environment
TL;DR: The luminescent solar concentrator (LSC) is a simple device at its heart, employing a polymeric or glass waveguide and luminecent molecules to generate electricity from sunlight when attached to a photovoltaic cell as mentioned in this paper.
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Luminescent layers for enhanced silicon solar cell performance: Up-conversion
TL;DR: In this paper, the application of rare-earth-doped inorganic materials for achieving external quantum efficiencies greater than unity and enhancing the conversion efficiency of silicon solar cells was examined, and the opportunities for the DC of high-energy solar photons to multiple photons with energy greater than the silicon bandgap were discussed.
Journal ArticleDOI
Spectroscopic and Device Aspects of Nanocrystal Quantum Dots
Jeffrey M. Pietryga,Young-Shin Park,Young-Shin Park,Jaehoon Lim,Andrew F. Fidler,Wan Ki Bae,Sergio Brovelli,Victor I. Klimov +7 more
TL;DR: Recent advances in nanocrystal research related to applications of QD materials in lasing, light-emitting diodes (LEDs), and solar energy conversion are examined.
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Compound Copper Chalcogenide Nanocrystals
TL;DR: This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility.
References
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Journal ArticleDOI
GaAs concentrator solar cell
L. W. James,R. L. Moon +1 more
TL;DR: In this article, an experimental 1/2−in.−diam cell was operated in air mass 1.4 sunlight with an output power density of 4.52 W/cm2 at an effective concentration of 312 suns with a power conversion efficiency of 17.5%.
Journal ArticleDOI
The Trapping of Fluorescent Light Produced within Objects of High Geometrical Symmetry
TL;DR: In this article, the trapping fraction of rectangular parallelepipeds, plane parallel sheets, and spheres is derived for various values of refractive index, including 1.225, 1.500, and 2.000.
Journal ArticleDOI
Design principles of fluorescence radiation converters
TL;DR: In this paper, the influence of optical contact media, reflectors and light attenuation on the light collection performance of scintillators by systems using light conversion in fluorescent materials is discussed.
Journal ArticleDOI
Radiance Amplification by a Fluorescence Radiation Converter
TL;DR: In this paper, a two-stage fluorescence radiation converter consisting of fluorescent acrylic glasses and suitably attached reflectors was used to detect diffuse, non-directional quantum and particle radiation and for the application of small semiconductor detectors with high sensitivity in the longwavelength region of the visible spectrum.
Journal ArticleDOI
Outlooks for GaAs terrestrial photovoltaics
Jerry M. Woodall,Harold J. Hovel +1 more
TL;DR: In this article, the role of other III-V and II-VI compounds, particularly CdS, was discussed and GaAs photovoltaic device structure was examined as an attractive alternate to Si devices for large scale terrestrial power generation.
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