School of Chemical and Physical Sciences, The MacDiarmid Institute for Advanced Materials and Nanotechnology, The Dodd-Walls Centre for Photonic and Quantum Technologies, Victoria University of Wellington, Wellington 6140, New Zealand.
ACS Appl Mater Interfaces. 2023 Apr 12;15(14):17914-17921. doi: 10.1021/acsami.3c01222. Epub 2023 Mar 28.
Luminescent solar concentrators (LSCs) concentrate light via luminescence within a planar-waveguide and have potential use for building-integrated photovoltaics. However, their commercialization and potential applications are currently hindered greatly by photon reabsorption, where emitted waveguided light is parasitically reabsorbed by a luminophore. Nanotetrapod semiconductor materials have been theorized to be excellent luminophores for LSCs owing to their inherently large Stokes shifts. Here we present the first nanotetrapod-based LSCs (5 × 5 × 0.3 cm) reported in the literature. External quantum efficiencies as high as 4.9 ± 0.5% were achieved under AM1.5G conditions. We also perform an in-depth investigation by optical characterization of the different operational metrics of our nanotetrapod-based LSCs and show reabsorption to be eliminated (mean number of average reabsorption events per photon equal to 0.00) in our most extended nanotetrapod devices.
发光太阳能集中器（LSCs）通过在平面波导内的发光来集中光，并且对于建筑集成光伏具有潜在的应用。然而，光子再吸收极大地阻碍了它们的商业化和潜在应用，其中发射的波导光被发光体寄生吸收。理论上，由于其固有的大斯托克斯位移，纳米四脚体半导体材料是出色的 LSC 发光体。在这里，我们提出了文献中首次报道的基于纳米四脚体的 LSC（5×5×0.3 cm）。在 AM1.5G 条件下，实现了高达 4.9±0.5%的外量子效率。我们还通过对我们的基于纳米四脚体的 LSC 的不同工作指标的光学特性进行深入研究，表明再吸收已被消除（每个光子的平均再吸收事件数平均值等于 0.00），在我们最扩展的纳米四脚体器件中。
