Geometrical concentration for enhanced up-conversion: A review of recent results in energy and biomedical applications
Geometrical concentration for enhanced up-conversion: A review of recent results in energy and biomedical applications
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DOI：
10.1016/j.optmat.2018.05.064
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发表时间：
2018-09-01
影响因子：
3.9
通讯作者：
Richards, Bryce S.
中科院分区：
文献类型：
--
作者：
Arnaoutakis, Georgios E.;Richards, Bryce S.
上转换技术在能源和生物医学领域有着广泛的应用前景。为了实现显著的功率转换效率，需要高辐照度。在太阳能应用中，这种辐照度转化为高于一个太阳的太阳能集中度，在没有几何或局部场集中的情况下无法获得。对于生物医学应用，需要增强的灵敏度和成像分辨率，同时需要低样品体积。在这篇综述中，几何浓度上转换过程的方法的性能进行审查的基础上最近报道的结果。在c-Si和beta-NaYF 4：25%Er3+中的复合抛物面聚光器是迄今为止最有前途的方法，在入射辐照度为240 W/m（2）时，器件的外量子效率为1.8%。
Up-conversion is one of the promising approaches for energy and biomedical applications. To enable significant power conversion efficiencies, high irradiance is required. In solar energy applications, this irradiance translates to solar concentrations higher than one sun, unable to be obtained without geometrical or local-field concentration. For biomedical applications, enhanced sensitivity and imaging resolution are required, accompanied by low sample volumes. In this review, the performance of approaches with geometrical concentration on up conversion processes is reviewed based on recently reported results. Compound parabolic concentrators in c-Si and beta-NaYF4: 25%Er3+ is to-date the most promising approach, with a device external quantum efficiency of 1.8% at incident irradiance of 240 W/m(2).