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首页> 外文会议>Conference on reflection, scattering, and diffraction from surfaces >Light Propagation in Phosphor-Filled Matrices for Photovoltaic PL Down-Shifting
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Light Propagation in Phosphor-Filled Matrices for Photovoltaic PL Down-Shifting

机译：磷PL向下移位的磷填充基质中的光传播

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Efficient transparent light converters have received lately a growing interest from optical device industries (LEDs, PV, etc.). While organic luminescent dyes were tested in PV light-converting application, such restrictions as small Stokes shifts, short lifetimes, and relatively high costs must yet be overcome. Alternatively, use of phosphors in transparent matrix materials would mean a major breakthrough for this technology, as phosphors exhibit long-term stability and are widely available. For the fabrication of phosphor-filled layers tailored specifically for the desired application, it is of great importance to gain deep understanding of light propagation through the layers, including the detailed optical interplay between the phosphor particles and the matrix material. Our measurements show that absorption and luminescent behavior of the phosphors and especially the scattering of light by the phosphor particles play an important role. In this contribution we have investigated refractive index difference between transparent binder and phosphors. Commercially available highly luminescent UV and near-UV absorbing μm-sized powder is chosen for the fabrication of phosphor-filled layers with varied refractive index of transparent polymer matrix, and well-defined particle size distributions. Solution-processed thick layers on glass substrates are optically analyzed and compared with simulation results acquired from CROWM, a combined wave optics/ray optics home-built software. The results demonstrate the inter-dependence of the layer parameters, prove the importance of careful optimization steps required for fabrication of efficient light converting layers, and, thus, show a path into the future of this promising approach.
机译：近年来，高效的透明光转换器已受到光学设备行业（LED，PV等）的越来越多的关注。尽管有机发光染料已在PV光转换应用中进行了测试，但仍必须克服诸如斯托克斯位移小，寿命短和成本相对较高的限制。另外，在透明基体材料中使用磷光体将意味着这项技术的重大突破，因为磷光体具有长期的稳定性，并且得到了广泛的应用。对于专门为所需应用量身定制的荧光粉填充层的制造，非常重要的一点是深入了解穿过这些层的光传播，包括荧光粉颗粒与基体材料之间的详细光学相互作用。我们的测量表明，磷光体的吸收和发光行为，尤其是磷光体颗粒对光的散射起着重要的作用。在这一贡献中，我们研究了透明粘合剂和磷光体之间的折射率差。选择市售的高发光UV和近UV吸收μm大小的粉末来制造荧光粉填充的层，该层的透明聚合物基质的折射率各不相同，并且粒度分布明确。对玻璃基板上的固溶处理厚层进行光学分析，并将其与从CROWM（一种组合的波光学/射线光学自制软件）获得的模拟结果进行比较。结果证明了层参数的相互依赖性，证明了制造高效的光转换层所需的精心优化步骤的重要性，并因此显示了这一有前途的方法的未来之路。

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