Luminescent solar concentrators (LSCs) are light-management devices and are used for harvesting and concentrating solar light from a large area to their edges. Being semitransparent devices, LSCs show great promise for future utilization in glass walls of urban buildings as environmentally friendly photovoltaic power plants. The development of cheap and eco-safe materials, the extension of the LSC operation range, and the enhancement of the optical efficiency are the key challenges, which need to be solved in order to transform energetically passive buildings into self-sustainable units. Herein, a large area (64 cm2) tandem LSC fabricated using entirely eco-friendly highly emissive blue, green, and red carbon dots is demonstrated, with an internal optical quantum efficiency of 23.6% and an external optical quantum efficiency of 2.3%, while maintaining a high transparency across the visible spectrum. This opens up a new direction for the application of carbon dots in advanced solar light harvesting technologies.

中文翻译：

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一种基于碳点的串联发光太阳能聚光器。

发光太阳能聚光器（LSC）是一种光管理设备，用于从大面积到边缘收集和聚集太阳光。作为半透明设备，LSC有望在未来的城市建筑玻璃墙中用作环保型光伏电站。廉价和生态安全材料的开发，LSC操作范围的扩展以及光学效率的提高是关键挑战，需要将能源被动式建筑物转变为可自我维持的单元时，必须解决这些挑战。在此，展示了使用完全环保的高发射蓝，绿和红碳点制造的大面积（64平方厘米）串联LSC，其内部光量子效率为23.6％，外部光量子效率为2.3％，同时在可见光谱范围内保持较高的透明度。这为碳点在先进的太阳光收集技术中的应用开辟了新的方向。