As a large-area solar radiation collector, luminescent solar concentrators (LSCs) can be used as power generation units in semitransparent solar windows, modernized agricultural greenhouses and building facades. However, the external optical efficiency and long-term stability of the LSCs limit their practical applications due to the sensitivity of the emitters to the light and environmental conditions. Here, we used the concept of “laminated glass” to prepare LSCs, which consist of two waveguide layers and the quantum dots (QDs)/polymer interlayer, and we tune the refractive index of the different parts of the system to improve the external optical efficiency and stability of the LSCs, simultaneously. The waveguide layer can be glass, quartz, polymethyl methacrylate (PMMA) and other transparent materials. The CdSe/CdS core/shell QDs were used as fluorophores to prepare the interlayer of the LSCs. The external optical efficiency of the laminated LSCs is associated with the refractive index of the three layers: the closer the refractive index, the higher the η_opt. The highest external optical efficiency of 3.4% has been achieved for the laminated PMMA/QDs-polymer/PMMA LSCs, which improved ∼92% compared to the single-layered CdSe/CdS based LSCs. To the best of our knowledge, this is the highest efficiency for the LSCs based on CdSe/CdS QDs. These results pave the way to realize high efficiency laminated windows as power generation units by suitably tuning the structure of the LSC, and provide the theoretical guidance for the LSCs utilized in building integrated photovoltaics.

作为大面积的太阳能辐射收集器，发光太阳能集中器（LSC）可以用作半透明太阳能窗户，现代化农业温室和建筑立面中的发电单元。但是，由于发射器对光和环境条件的敏感性，LSC的外部光学效率和长期稳定性限制了它们的实际应用。在这里，我们使用“夹层玻璃”的概念来制备由两层波导层和量子点（QD）/聚合物夹层组成的LSC，并调整系统不同部分的折射率以改善外部光学特性。 LSC的效率和稳定性同时实现。波导层可以是玻璃，石英，聚甲基丙烯酸甲酯（PMMA）和其他透明材料。CdSe / CdS核/壳量子点用作荧光团，以制备LSC的中间层。叠层LSC的外部光学效率与三层的折射率相关：折射率越近，其折射率越高。η_选择。层压的PMMA / QDs-聚合物/ PMMA LSC达到了3.4％的最高外部光学效率，与基于单层CdSe / CdS的LSC相比提高了约92％。据我们所知，这是基于CdSe / CdS QD的LSC的最高效率。这些结果为通过适当调整LSC的结构铺平了实现高效层压窗作为发电装置的道路，并为在建筑集成光伏中使用的LSC提供了理论指导。