Visible-transparent luminescent solar concentrators (VT-LSCs) can be integrated with solar cells for designing solar glasses. Recently, rare-earth complexes, semiconductor nanocrystals, and carbon nanodots (CNDs) have been applied in developing VT-LSCs. However, several challenges still existed, such as quantum yields (QYs) at high-loading contents, scattering/reabsorption losses, and stability. Here, highly luminescent and visible-transparent composites based on organosilane-functionalized CNDs (Si-CNDs) cross-linked in the siloxane matrix were prepared. The composites with a high-loading content (∼10 wt %) possess ultrahigh QYs of ∼94% due to surface passivation, cross-linking-enhanced emission, and negligible inter-CND energy transfer. Moreover, they still appear exceptionally transparent and, thus, are suitable for VT-LSCs. Eco-friendly VT-LSCs without colored tinting were fabricated, yielding high internal and external quantum efficiencies of ∼66% and ∼3.9%. Our demonstration would pave a bright way for the utilization of eco-friendly VT-LSCs in solar glasses.

中文翻译：

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基于硅氧烷基体中碳纳米点的可见透明发光太阳能聚光器，在高负载量下具有超高的量子产率和光学透明性。

可见光透明发光太阳能集中器（VT-LSC）可以与太阳能电池集成在一起，以设计太阳能玻璃。近来，稀土配合物，半导体纳米晶体和碳纳米点（CND）已用于开发VT-LSC。但是，仍然存在一些挑战，例如高负载含量下的量子产率（QYs），散射/重吸收损失和稳定性。在此，制备了基于在硅氧烷基质中交联的有机硅烷官能化的CND（Si-CND）的高发光和可见透明的复合材料。高负载量（〜10 wt％）的复合材料由于表面钝化，交联增强发射和可忽略的CND能量转移而具有约94％的超高QY。而且，它们仍然显得异常透明，因此适用于VT-LSC。制造了无色着色的环保型VT-LSC，其内部和外部量子效率高，分别为〜66％和〜3.9％。我们的演示将为在太阳能眼镜中使用环保的VT-LSC铺平道路。