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

Mingyang Wei, F. Pelayo García de Arquer, Grant Walters, Zhenyu Yang, Li Na Quan, Younghoon Kim, Randy Sabatini, Rafael Quintero-Bermudez, Liang Gao, James Z. Fan, Fengjia Fan, Aryeh Gold-Parker, Michael F. Toney, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

131 Scopus citations

Abstract

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 cm 2 , which represents a fourfold enhancement over the best previously reported perovskite LSCs.

Original languageEnglish (US)
Pages (from-to)197-205
Number of pages9
JournalNature Energy
Volume4
Issue number3
DOIs
StatePublished - Mar 1 2019

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

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