AI Article Synopsis
- Luminescent and transparent composites, particularly those incorporating gold nanoclusters in aluminosilicate glass, are crucial for improving the efficiency of photonic applications like luminescent solar concentrators (LSCs).
- The developed AuNC@glass composite exhibits high transparency, minimal reabsorption losses, and increased photoluminescence quantum yield, making it an effective material.
- Additionally, the use of non-toxic elements and stable inorganic matrices contributes to the environmental friendliness and durability of these composites in outdoor conditions.
Article Abstract
Luminescent and transparent composites formed by embedding luminophores in a solid matrix are essential components for several photonic applications, such as luminescent solar concentrators (LSCs) and luminescent down-shifting/conversion layers. For these applications, the optical losses, including reabsorption and scattering need to be minimized, while the photoluminescence (PL) emission must be stable against outdoor environments. Here, highly transparent and luminescent aluminosilicate glass doped with surface-engineered gold nanoclusters (AuNCs) was prepared without involving toxic elements and hazardous solvents. Such an AuNC@glass composite with a high loading (∼14 wt%) exhibits a unique absorption profile; near-unity absorptance in the absorption range but near-zero reabsorption in the emission region, and thus generates bright PL emission with negligible reabsorption losses. Meanwhile, the PL quantum yield was enhanced (from ∼1% to ∼14%) without sacrificing the Stokes shift, while still maintaining high optical transparency. In addition, they have high stability due to the effective protection of rigid inorganic matrices, and thus would be eco-friendly candidates for further preparation of efficient and reabsorption-free LSCs.
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| http://dx.doi.org/10.1039/d0nr01668c | DOI Listing |
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