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首页> 外文会议>Conference on 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：用实验验证的射线跟踪/蒙特卡罗模型，影响发光太阳能集中器中自吸收损失的参数探索

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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）是低成本的光电装置，其通过浓度的手段减少必要的半导体材料的每一个光生伏打太阳能转换器的每单位面积的量。该装置是由薄的塑料板，其中发光物质（荧光团）已经被并入。荧光团吸收太阳光以及对辐射重新发射的能量的一部分。全内反射捕获所发射的光内的大部分在板和它波导管以与太阳能电池的窄侧面连接，在那里转换成电能发生。这种装置的效率是尚未相当低，由于几个损耗机制，其中自吸是非常重要的。合并的射线追踪和蒙特卡罗模拟为现有制造LSC-器件的效率估计一个广泛使用的工具。我们应用此方法到模型实验，其中我们分析自吸收到具有不同吸收/发射光谱重叠（斯托克斯位移）的荧光团的LSC-效率的影响：几个有机染料和半导体量子点（单个化合物和核/壳型-ⅱ）。将这些结果与实验展示良好协议的结果进行比较。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自吸收增加后的强度损失的影响。结果用于采用称为自吸收横截面的量，并将其作为可从基本数据获得的材料的自吸收性能的可靠标准，并且具有比目前使用的斯托克斯更普遍的申请范围-转移。

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