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Ultrafast narrowband exciton routing within layered perovskite nanoplatelets enables low-loss luminescent solar concentrators
- Ultrafast narrowband exciton routing within layered perovskite nanoplatelets enables low-loss luminescent solar concentrators
- Wei, Mingyang; de Arguer, F. Pelayo Garcia; Walters, Grant; Yang, Zhenyu; Quan, Li Na; Kim, Younghoon; Sabatini, Randy; Quintero-Bermudez, Rafael; Gao, Liang; Fan, James Z.; Fan, Fengjia; Gold-Parker, Aryeh; Toney, Michael F.; Sargent, Edward H.
- DGIST Authors
- Kim, Younghoon
- Issue Date
- Nature Energy, 4(3), 197-205
- Article Type
- Excitons; Flowcharting; Luminescence; Metal halides; Perovskite; Photoelectrochemical cells; Photovoltaic cells; Solar concentrators; Solar energy; Solar power generation; Absorbing medium; Concentrated lights; Concentration factors; Halide perovskites; Layered perovskite; Luminescent solar concentrators; Number of layers; Photoluminescence quantum yields; Quantum efficiency
- In luminescent solar concentrator (LSC) systems, broadband solar energy is absorbed, down-converted and waveguided to the panel edges where peripheral photovoltaic cells convert the concentrated light to electricity. Achieving a low-loss LSC requires reducing the reabsorption of emitted light within the absorbing medium while maintaining high photoluminescence quantum yield (PLQY). Here we employ layered hybrid metal halide perovskites—ensembles of two-dimensional perovskite domains—to fabricate low-loss large-area LSCs that fulfil this requirement. We devised a facile synthetic route to obtain layered perovskite nanoplatelets (PNPLs) that possess a tunable number of layers within each platelet. Efficient ultrafast non-radiative exciton routing within each PNPL (0.1 ps−1) produces a large Stokes shift and a high PLQY simultaneously. Using this approach, we achieve an optical quantum efficiency of 26% and an internal concentration factor of 3.3 for LSCs with an area of 10 × 10 cm2, which represents a fourfold enhancement over the best previously reported perovskite LSCs. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
- Nature Publishing Group
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- Convergence Research Center for Solar Energy1. Journal Articles
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