Full-Wood Utilization Strategy toward a Directional Luminescent Solar Concentrator.
basic_science · Level V
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- Record sourced from PubMed, PMID 37815407.
- Also identified by DOI 10.1021/acsnano.3c06162.
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Abstract
Luminescent solar concentrators (LSCs) have proven to be highly effective in enhancing the conversion efficiency of photovoltaic (PV) cells. However, the traditional LSCs always suffer from self-absorption and escape the losses of luminescence. To these challenges, this study presents an ingenious all-wood-based LSC (W-LSC) with directional light-concentrating capabilities. By converting lignin into fluorescent carbon quantum dots (CQDs) and integrating them into transparent cellulose channels in delignified wood, we achieved efficient directional luminescence transmission in the W-LSC is achieved. The synthesized lignin-based CQDs (L-CQDs) exhibited a large Stokes shift (0.63 eV) and a bright yellow emission (540 nm). The prepared W-LSC possessed an external optical efficiency (η<sub>opt</sub>) along the longitudinal (L) direction of 4.60% under a low irradiation intensity (40 mW·cm<sup>-2</sup>). Besides, contributed to the low thermal conductivity (0.300 W·m<sup>-1</sup>·K<sup>-1</sup>) of wood, the W-LSC maintained an η<sub>opt</sub> of 4.03% at a temperature of 65 °C. Furthermore, the W-LSC demonstrated high tensile strength (424 MPa) and light transmission (85%). By leveraging the advantages of wood, this approach provides a different solution for enhancing solar energy utilization and advancing sustainable building.