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首页> 外文会议>High and low concentrator systems for solar electric applications VIII >Exploration of parameters influencing the self-absorption losses in luminescent solar concentrators with an experimentally validated combined ray-tracing/Monte-Carlo model
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Exploration of parameters influencing the self-absorption losses in luminescent solar concentrators with an experimentally validated combined ray-tracing/Monte-Carlo model

机译：通过实验验证的射线追踪/蒙特卡洛组合模型探索影响发光太阳能聚光器自吸收损耗的参数

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Luminescent solar concentrators (LSCs) are low cost photovoltaic devices, which reduce the amount of necessary semiconductor material per unit area of a photovoltaic solar energy converter by means of concentration. The device is comprised of a thin plastic plate in which luminescent species (fluorophores) have been incorporated. The fluorophores absorb the solar light and radiatively re-emit a part of the energy. Total internal reflection traps most of the emitted light inside the plate and wave-guides it to a narrow side facet with a solar cell attached, where conversion into electricity occurs. The efficiency of such devices is as yet rather low, due to several loss mechanisms, of which self-absorption is of high importance. Combined ray-tracing and Monte-Carlo simulations is a widely used tool for efficiency estimations of LSC-devices prior to manufacturing. We have applied this method to a model experiment, in which we analysed the impact of self-absorption onto LSC-efficiency of fluorophores with different absorption/emission-spectral overlap (Stokes-shift): several organic dyes and semiconductor quantum dots (single compound and core/shell of type-Ⅱ). These results are compared with the ones obtained experimentally demonstrating a good agreement. The validated model is used to investigate systematically the influence of spectral separation and luminescence quantum efficiency on the intensity loss in consequence of increased self-absorption. The results are used to adopt a quantity called the self-absorption cross-section and establish it as reliable criterion for self-absorption properties of materials that can be obtained from fundamental data and has a more universal scope of application, than the currently used Stokes-shift.
机译：发光太阳能集中器（LSC）是低成本的光伏装置，其通过集中减少了光伏太阳能转换器的每单位面积的必要半导体材料的量。该设备由一块薄的塑料板组成，其中已掺入了发光物质（荧光团）。荧光团吸收太阳光并辐射出一部分能量。全内反射将大部分发射光捕获在板内部，并将其波导至附有太阳能电池的狭窄侧面，在此处发生转换。由于多种损耗机制，这种装置的效率仍然很低，其中自吸收是非常重要的。组合的光线追踪和蒙特卡洛模拟是一种广泛使用的工具，用于在制造之前估算LSC设备的效率。我们将该方法应用于模型实验，在该模型实验中，我们分析了自吸收对具有不同吸收/发射光谱重叠（斯托克斯位移）的荧光团的LSC效率的影响：几种有机染料和半导体量子点（单个化合物）和Ⅱ型核/壳）。将这些结果与通过实验获得的结果进行了比较，证明了很好的一致性。经过验证的模型用于系统地研究光谱分离和发光量子效率对由于自吸收增加而引起的强度损失的影响。结果被用来采用一个称为自吸收截面的量，并将其建立为材料自吸收性能的可靠标准，该材料可以从基本数据中获得，并且比目前使用的斯托克斯具有更广泛的应用范围-转移。

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