Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 13, Pages 7259-7266Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202014983
Keywords
block copolymers; perovskites; materials science; nanostructures; semiconductors
Categories
Funding
- NSF [CBET 1803495, CMMI 1914713, DMR 1903990]
- National Science Foundation of China [U1804128, 51973201]
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A robust amphiphilic-diblock-copolymer-enabled strategy has been developed for crafting highly-stable anisotropic CsPbBr3 nanosheets. These dual-protected nanosheets exhibit remarkable stabilities and find application in white-light-emitting diodes.
Approaches to achieve stable perovskite nanocrystals (PNCs) of interest, in particular those with large structural anisotropy, through protective coating of the inorganic shell at a single-nanocrystal (NC) level are comparatively few and limited in scope. Reported here is a robust amphiphilic-diblock-copolymer-enabled strategy for crafting highly-stable anisotropic CsPbBr3 nanosheets (NSs) by in situ formation of a uniform inorganic shell (1st shielding) that is intimately ligated with hydrophobic polymers (2nd shielding). The dual-protected NSs display an array of remarkable stabilities (i.e., thermal, photostability, moisture, polar solvent, aliphatic amine, etc.) and find application in white-light-emitting diodes. In principle, by anchoring other multidentate amphiphilic polymer ligands on the surface of PNCs, followed by templated-growth of shell materials of interest, a rich variety of dual-shelled, multifunctional PNCs with markedly improved stabilities can be created for use in optics, optoelectronics, and sensory devices.
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