Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 9, Pages 4872-4880Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta12149d
Keywords
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Funding
- National Natural Science Foundation of China [51502130, 21701015, 21811530054]
- Natural Science Foundation of Jiangsu Province [BK20150581]
- Thousand Talents Program for Young Researchers, Shuangchuang Program of Jiangsu Province
- Jiangsu Key Laboratory for Nano Technology
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The high-performance light-management slabs made of low-cost, highly emissive, and ultra-stable nanocrystal (NC)-polymer composites are desirable for application in large-area luminescent solar concentrators (LSCs). However, although the reported photoluminescence (PL) quantum yield (QY) of NCs in solution is up to 90%, PL QY of NCs in a polymer matrix is usually low, which limits the performance of LSCs. Herein, we demonstrated a new strategy for the synthesis of formamidinium lead bromide (FAPbBr(3)) NCs via room-temperature solvent-induced reprecipitation using dicarboxylic acids as ligands and the preparation of NC-polymer composite slabs for LSCs. Due to the strong binding of dicarboxylic acids, the as-synthesized decanedioic acid (DA)-capped FAPbBr(3) NCs displayed high PL QY (90 +/- 5%), increased chemical yield, and improved stability as compared to monocarboxylic oleic acid (OA)-capped NCs (PL QY of 80 +/- 5%) synthesized in the same conditions. Furthermore, in the presence of toluene as the solvent, these DA-capped NCs exhibited good compatibility with polystyrene (PS); thus, the NCs-PS slurry exhibited appropriate viscosity. Therefore, it was convenient to deposit the slurry onto commercially available polymethyl methacrylate (PMMA) slabs with a standard doctor blade. The optimized NCs-PS-PMMA slabs with PL QY of 92 +/- 5% were sustained for over 1000 hours under high-temperature (60 degrees C) and high-humidity (relative humidity, RH = 90%) environments. The results show that the perovskite NC-based slabs developed in this study have the advantages of low cost, high emissivity, and good stability and may contribute to the field of LSCs.
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