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Download fileLead-free Rb2SnCl6:Bi Perovskite Nanocrystals for Luminescence Emission
journal contribution
posted on 13.05.2022, 22:05 by Sarmad
Ahmad Qamar, Tsai-Wei Lin, Yi-Ting Tsai, Chun Che LinThe
development of lead-free nanomaterials, compared to the conventional
(CsPbX3, X = Cl, Br, and I) perovskites, for potential
optoelectronic devices has gained much scientific attention due to
the increasing lead toxicity and photostability issues. Herein, the
development of undoped (Rb2SnCl6) and bismuth-doped
(Rb2SnCl6:X%Bi) perovskite nanocrystals was
carried out via the facile hot-injection method using
available non-toxic precursors. Different production parameters such
as tin precursors (SnCl2 and SnCl4), ligands
(OA/OLAM), and dopant (Bi3+) concentrations were optimized
using XRD measurements to improve the photoluminescence quantum yield
(PLQY) and photostability of Rb2SnCl6:Bi perovskite
nanocrystals. Comprehensive structural/functional characterization
was performed which exhibited the passivated attachment of ligands
on the surface of nanostructures. Moreover, a positive influence of
dopant addition on the fluorescence intensity and stability properties
of nanocrystals was observed, with highest improvement at 4% concentration
(Rb2SnCl6:4% Bi). The slight blue luminescence
emission, peaking at 426 nm, was observed at 4% Bi, with a stokes
shift of 70 nm and full width at half-maximum (FWHM) of 65 nm. In
conclusion, the present study provides a consistent pathway toward
the design optimization of lead-free perovskite nanostructures for
the induction of improved photoluminescence properties for light-emitting,
solar cells and in vivo imaging applications.
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present study providespotential optoelectronic devicesphotoluminescence quantum yielddifferent production parametersconsistent pathway towardimproved photoluminescence propertiesincreasing lead toxicity2 </ subfree perovskite nanostructuresstability propertiesvivo </via </free nanomaterialstoxic precursorstin precursorsstokes shiftsolar cellspositive influenceperovskite nanocrystalspassivated attachmentolam ),luminescence emissionimaging applicationshighest improvementfunctional characterizationfull widthfluorescence intensityfacile hotdesign optimizationcomprehensive structural70 nm65 nm426 nm