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Related Experiment Video

Updated: Mar 21, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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Luminescent solar concentrators utilizing stimulated emission.

Md Rejvi Kaysir, Simon Fleming, Rowan W MacQueen

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    This study introduces stimulated emission to reduce reabsorption losses in luminescent solar concentrators (LSCs). This approach enhances directional emission, improving the efficiency of solar energy harvesting for building-integrated photovoltaics.

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    Area of Science:

    • Photovoltaics
    • Materials Science
    • Optics

    Background:

    • Luminescent solar concentrators (LSCs) offer a cost-effective approach to solar energy, particularly for building-integrated applications.
    • Significant reabsorption losses currently limit the commercial viability and efficiency of LSC technology.
    • Developing strategies to mitigate reabsorption is crucial for advancing LSC performance.

    Purpose of the Study:

    • To introduce a novel method for reducing reabsorption losses in LSCs.
    • To improve the directional emission properties of LSCs.
    • To enable net gain in LSC systems for enhanced solar energy conversion.

    Main Methods:

    • Utilizing stimulated emission from a seed laser to modify the emission spectrum of dye molecules within the LSC.
    • Narrowing the emission spectrum to wavelengths that minimize reabsorption.
    • Directing the modified emission towards a photovoltaic cell.
    • Developing a mathematical model incorporating thermodynamic considerations to evaluate system performance.

    Main Results:

    • Demonstrated reduction in reabsorption losses through spectrally narrowed and directed emission.
    • Achieved conditions for net gain within the LSC system.
    • Identified key parameters influencing the net effective output power.

    Conclusions:

    • Stimulated emission presents a viable strategy to overcome reabsorption limitations in LSCs.
    • The proposed method enhances both efficiency and directional control of light emission in LSCs.
    • The developed model provides a framework for optimizing LSC design for practical applications.