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Title: Ultrafast narrowband exciton routing within layered perovskite nanoplatelets enables low-loss luminescent solar concentrators

Journal Article · · Nature Energy

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. Here, 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.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1505426
Journal Information:
Nature Energy, Vol. 4, Issue 3; ISSN 2058-7546
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

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Swelling‐Deswelling Microencapsulation‐Enabled Ultrastable Perovskite−Polymer Composites for Photonic Applications journal December 2019
On-device lead sequestration for perovskite solar cells journal February 2020
Bidirectional optical signal transmission between two identical devices using perovskite diodes journal March 2020
Fabrication of highly emissive and highly stable perovskite nanocrystal-polymer slabs for luminescent solar concentrators journal January 2019
Band-bending induced passivation: high performance and stable perovskite solar cells using a perhydropoly(silazane) precursor journal January 2020
O 2 as a molecular probe for nonradiative surface defects in CsPbBr 3 perovskite nanostructures and single crystals journal January 2019
Integration of photoelectrochemical devices and luminescent solar concentrators based on giant quantum dots for highly stable hydrogen generation journal January 2019
Effect of dimensionality on the optical absorption properties of CsPbI 3 perovskite nanocrystals journal November 2019

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