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Linear Coassembly of Upconversion and Perovskite Nanoparticles: Sensitized Upconversion Emission of Perovskites by Lanthanide‐Doped Nanoparticles
Author(s) -
Estebanez Nestor,
CortésVillena Alejandro,
FerreraGonzález Juan,
GonzálezBéjar María,
Galian Raquel E.,
GonzálezCarrero Soranyel,
PérezPrieto Julia
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202003766
Subject(s) - materials science , photon upconversion , nanoparticle , lanthanide , luminescence , doping , halide , ytterbium , chemical engineering , perovskite (structure) , polymer , nanotechnology , optoelectronics , inorganic chemistry , composite material , ion , organic chemistry , chemistry , engineering
Sensitized emission of lead halide perovskite nanoparticles (LHPNPs) can be achieved by near‐infrared (NIR) excitation of nearby lanthanide‐doped upconversion nanoparticles (UCNPs) by using a low‐cost diode laser. Here, the first preparation of linear assemblies of core and core–shell NPs, as well as linear coassemblies of LHPNPs and UCNPs, within an open peapod‐like lead sulfate shell are reported. UCNPs with a NaYF 4 matrix doped with ytterbium and thulium or erbium, and with an inert shell of NaYF 4 in the case of core‐shell, and all‐inorganic CsPbX 3 NPs (X = halide) are chosen for these studies. Interestingly, the lead sulfate shell enhances the luminescence of the core/core– shell UCNPs in the polymers by ≈20‐fold and it also plays a role in the efficiency of the sensitized emission of the LHPNPs under NIR excitation of the UCNP‐LHPNP copolymers, as well as in the chemical stability of the LHPNPs in contact with water. The (co)polymers are prepared as colloids and deposited as solid films on a glass substrate. The lifetime of the sensitized LHP emission and the efficiency of the process wholly depends on the irradiance and on the sample state. These copolymers are promising candidates for the manufacture of photonic devices.