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Poly(methyl methacrylate) Films with High Concentrations of Silicon Quantum Dots for Visibly Transparent Luminescent Solar Concentrators.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-01-07 , DOI: 10.1021/acsami.9b22903 Samantha K E Hill 1 , Ryan Connell 2 , Jacob Held 2 , Colin Peterson 3 , Lorraine Francis 2 , Marc A Hillmyer 3 , Vivian E Ferry 2 , Uwe Kortshagen 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-01-07 , DOI: 10.1021/acsami.9b22903 Samantha K E Hill 1 , Ryan Connell 2 , Jacob Held 2 , Colin Peterson 3 , Lorraine Francis 2 , Marc A Hillmyer 3 , Vivian E Ferry 2 , Uwe Kortshagen 1
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Silicon quantum dots (Si QDs) are attractive, nontoxic luminophores for luminescent solar concentrators (LSCs). Here, we produced Si QD/poly(methyl methacrylate) (PMMA) films on glass by doctor-blading polymer solutions and achieved films with low light scattering at an order of magnitude higher Si QD weight fraction than has been achieved previously in the bulk. We suggest that the fast solidification rate of films as compared to slow bulk polymerization is an enabling factor in avoiding large agglomerates within the nanocomposites. Scanning electron microscopy confirmed that ∼100 nm or larger QD agglomerates exist in light-scattering films, and photoluminescence intensity measurements show that light scattering, if present, significantly reduces waveguiding efficiencies for LSCs. Nonscattering films fabricated in this work exhibit high ultraviolet absorption (>80%) paired with high visible transmission (>87%) and minimal visible haze (∼1%), making them well suited for semitransparent coatings for LSCs realized as solar harvesting windows.
中文翻译：
高浓度硅量子点的聚（甲基丙烯酸甲酯）薄膜，用于可见光透明的太阳能聚光器。
硅量子点（Si QDs）是用于发光太阳能聚光器（LSC）的有吸引力的无毒发光体。在这里，我们通过刮涂聚合物溶液在玻璃上生产了Si QD /聚甲基丙烯酸甲酯（PMMA）薄膜，并获得了低光散射薄膜，其Si QD重量分数比以前在批量生产中要高出一个数量级。我们建议，与缓慢的本体聚合相比，薄膜的快速固化速率是避免纳米复合材料内大量团聚的一个成因。扫描电子显微镜证实，光散射膜中存在约100 nm或更大的QD团聚体，光致发光强度测量表明，光散射（如果存在）会显着降低LSC的波导效率。
更新日期：2020-01-21
中文翻译：
高浓度硅量子点的聚（甲基丙烯酸甲酯）薄膜，用于可见光透明的太阳能聚光器。
硅量子点（Si QDs）是用于发光太阳能聚光器（LSC）的有吸引力的无毒发光体。在这里，我们通过刮涂聚合物溶液在玻璃上生产了Si QD /聚甲基丙烯酸甲酯（PMMA）薄膜，并获得了低光散射薄膜，其Si QD重量分数比以前在批量生产中要高出一个数量级。我们建议，与缓慢的本体聚合相比，薄膜的快速固化速率是避免纳米复合材料内大量团聚的一个成因。扫描电子显微镜证实，光散射膜中存在约100 nm或更大的QD团聚体，光致发光强度测量表明，光散射（如果存在）会显着降低LSC的波导效率。
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