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Energy Transfer in Nanodroplet-Based Luminescent Solar Concentrators
Lorenzo Vallan1, Julia W Mikurenda1, Alex Parra Sánchez-Camacho1
1Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.
Small (Weinheim an Der Bergstrasse, Germany)
|May 17, 2026
Summary
This study introduces nanoconfinement to improve luminescent solar concentrators (LSCs) by embedding dyes in nanodroplets. This prevents aggregation and reduces losses, boosting optical efficiency for building-integrated photovoltaics.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Luminescent solar concentrators (LSCs) are key for building-integrated photovoltaics.
- Efficiency is limited by dye aggregation and reabsorption losses.
Purpose of the Study:
- To develop a nanoconfinement strategy for enhancing LSC efficiency.
- To address aggregation-induced quenching and reabsorption losses.
Main Methods:
- Embedding organic dyes in oil nanodroplets within polyvinyl alcohol coatings.
- Utilizing six commercial dyes and demonstrating Förster resonance energy transfer (FRET) systems.
- Employing time-resolved spectroscopy and optical path measurements.
Main Results:
- Achieved millimolar dye loadings without aggregation, ensuring excellent optical quality and low haze.
- Demonstrated high optical efficiency in LSCs.
- Confirmed efficient intradroplet FRET, reducing distance-dependent losses.
Conclusions:
- Nanoconfinement is a versatile, sustainable, and scalable approach for efficient LSCs.
- This method offers practical and cost-effective preparation of aesthetically suitable LSCs for architectural integration.
- The strategy overcomes key limitations in current LSC technology.
