Red-Emissive Nanocrystals of Cs4MnxCd1-xSb2Cl12 Layered Perovskite

20 September 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


Layered double perovskite are currently investigated as emerging halide-based materials for optoelectronic applications. Herein, we present the synthesis of Cs4MnxCd1-xSb2Cl12 (0 ≤ x ≤ 1) nanocrystals (NCs). X-ray powder diffraction evidences the retaining of the same crystal structure for all the inspected composition; transmission electron microscopy revealed monodisperse particles with a mean size of 10.6 nm. The absorption spectra seem to be mostly determined by transitions related to Sb3+, whereas Mn2+ induced a red emission in the 625 – 650 nm range. The emission intensity and position varies with the Mn2+ content and reaches the maximum for the composition with x = 0.12. Finally, we demonstrated that the photoluminescence quantum yield (PLQY) of the latter NCs was boosted from 0.3% to 3.9% through a post-synthesis treatment. The present work enlarges the knowledge of colloidal layered double perovskite nanocrystals, stimulating future investigations of this emerging class of material.


layered double perovskite
red emission

Supplementary materials

Supplementary Information
Experimental procedures, ICP - OES analysis, additional XRD, TEM, optical analyses


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