Journal
NATURE ENERGY
Volume 4, Issue 3, Pages 197-205Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41560-018-0313-y
Keywords
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Funding
- US Department of the Navy, Office of Naval Research [N00014-17-1-2524]
- Ontario Research Fund Research Excellence Program
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- National Research Foundation of Korea Grant - Korean Government [2014R1A2A1A09005656, 2015M1A2A2058365]
- Connaught fund
- NSF GRFP [DGE-1147470]
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- National Research Foundation of Korea [2015M1A2A2058365] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 x 10 cm(2), which represents a fourfold enhancement over the best previously reported perovskite LSCs.
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