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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Journal ArticleDOI
Fluorescent solar energy collectors: Operating conditions with diffuse light
TL;DR: In this article, the fluorescent energy conversion principle using several sheets of transparent material doped with fluorescent molecules to concentrate radiation is extended to include diffuse radiation, and two cases are treated here: diffuse radiation only and a composite spectrum consisting of 40% direct and 60% diffuse radiation simulating the average illumination of a flat exposure in central Europe.
Journal ArticleDOI
Quantum dot solar concentrators
Amanda J. Chatten,Keith W. J. Barnham,B.F. Buxton,Nicholas J. Ekins-Daukes,Mohammad Azad Malik +4 more
TL;DR: In this paper, the luminescent properties of core-shell quantum dots are exploited in an unconventional solar concentrator, which promises to reduce the cost of photovoltaic electricity.
Journal ArticleDOI
Stokes-Shift-Engineered Indium Phosphide Quantum Dots for Efficient Luminescent Solar Concentrators
Sadra Sadeghi,Houman Bahmani Jalali,Rustamzhon Melikov,Baskaran Ganesh Kumar,Mohammad Mohammadi Aria,Cleva W. Ow-Yang,Sedat Nizamoglu +6 more
TL;DR: LSCs based on cadmium-free InP/ZnO core/shell QDs with type-II band alignment that allow for the suppression of reabsorption by Stokes shift engineering are reported.
Journal ArticleDOI
Monte-Carlo simulations of light propagation in luminescent solar concentrators based on semiconductor nanoparticles
TL;DR: In this article, the authors used Monte-Carlo simulations of photon transport to predict the performance of luminescent solar concentrators based on CdSe-CdTe quantum dots.
Journal ArticleDOI
Designing Dye–Nanochannel Antenna Hybrid Materials for Light Harvesting, Transport and Trapping
Gion Calzaferri,Rachel Méallet-Renault,Dominik Brühwiler,Robert Pansu,Igor Dolamic,Thomas Dienel,Pauline Adler,Huanrong Li,Andreas Kunzmann +8 more
TL;DR: Artificial photonic antenna systems that are built by incorporating chromophores into one-dimensional nanochannel materials and by organizing the latter in specific ways are discussed.
References
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Luminescent greenhouse collector for solar radiation.
Willes H. Weber,John J Lambe +1 more
Journal ArticleDOI
Limitations and Possibilities for Improvement of Photovoltaic Solar Energy Converters: Part I: Considerations for Earth's Surface Operation
TL;DR: In this paper, seven factors limiting the performance of photovoltaic solar energy converters are listed and explained, which can be classified into basic and technology-decided limitations.
Journal ArticleDOI
High‐efficiency Ga1−xAlxAs–GaAs solar cells
Jerry M. Woodall,H. Hövel +1 more
TL;DR: In this paper, a homojunction solar cell consisting of pGa1−xAlxAs−pGaAs-n GaAs was used to achieve power conversion efficiency of over 16% (corrected for contact area) measured in sunlight for air mass 1 at sea level, while efficiencies of 19-20% for an air mass value of 2 or more.
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