Thermodynamic Limits of Photon-Multiplier Luminescent Solar Concentrators
Thermodynamic Limits of Photon-Multiplier Luminescent Solar Concentrators
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DOI：
10.1103/prxenergy.1.033001
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
T. Baikie;A. Ashoka;A. Rao;N. Greenham
中科院分区：
文献类型：
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作者：
T. Baikie;A. Ashoka;A. Rao;N. Greenham
发光太阳能集中器（LSC）理论上能够以极高的效率集中直接和漫射太阳辐射。光子倍增器发光太阳能集中器（PM-LSC）含有超过100%光致发光量子效率的发色团。PM-LSC最近已经通过实验证明，并有望超越传统的LSC。然而，我们发现PM-LSC的热力学极限是不同的，有时相对于传统的LSC更极端。正如可以预期的那样，为了实现非常高的集中系数，PM-LSC设计还必须包括自由能变化，类似于传统LSC中的斯托克斯位移。值得注意的是，与LSC不同，PM-LSC的最大浓度比取决于入射光子场的亮度。对于某些亮度，但等效的能量损失，PM-LSC有一个更大的最大浓度因子比传统的LSC。我们发现，实现高浓度PM-LSC的热力学要求不同于传统的LSC。新模型提供了深入了解PM-LSC的浓度限制，并可用于提取进一步PM-LSC设计的设计规则。
Luminescent solar concentrators (LSCs) are theoretically able to concentrate both direct and diffuse solar radiation with extremely high efficiencies. Photon-multiplier luminescent solar concentrators (PM-LSCs) contain chromophores which exceed 100\% photoluminescence quantum efficiency. PM-LSCs have recently been experimentally demonstrated and hold promise to outcompete traditional LSCs. However, we find that the thermodynamic limits of PM-LSCs are different and are sometimes more extreme relative to traditional LSCs. As might be expected, to achieve very high concentration factors a PM-LSC design must also include a free energy change, analogous to the Stokes shift in traditional LSCs. Notably, unlike LSCs, the maximum concentration ratio of a PM-LSC is dependent on brightness of the incident photon field. For some brightnesses, but equivalent energy loss, the PM-LSC has a greater maximum concentration factor than that of the traditional LSC. We find that the thermodynamic requirements to achieve highly concentrating PM-LSCs differ from traditional LSCs. The new model gives insight into the limits of concentration of PM-LSCs and may be used to extract design rules for further PM-LSC design.