Issue 2, 2022

Red-emissive nanocrystals of Cs4MnxCd1−xSb2Cl12 layered perovskites

Abstract

Layered double perovskites are currently being 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 retention of the same crystal structure for all the inspected compositions; transmission electron microscopy revealed monodisperse particles with a mean size between 10.7 nm and 12.7 nm. The absorption spectra are mostly determined by transitions related to Sb3+, whereas Mn2+ induced a red emission in the 625–650 nm range. The photoluminescence emission intensity and position vary with the Mn2+ content and reach the maximum for the composition with x = 0.12. Finally, we demonstrate that the photoluminescence quantum yield of the latter NCs was increased from 0.3% to 3.9% through a post-synthesis treatment with ammonium thiocyanate. The present work expands the knowledge of colloidal layered double perovskite nanocrystals, stimulating future investigations of this emerging class of materials.

Graphical abstract: Red-emissive nanocrystals of Cs4MnxCd1−xSb2Cl12 layered perovskites

Supplementary files

Article information

Article type
Communication
Submitted
20 Sept. 2021
Accepted
30 Nov. 2021
First published
30 Nov. 2021

Nanoscale, 2022,14, 305-311

Red-emissive nanocrystals of Cs4MnxCd1−xSb2Cl12 layered perovskites

E. Sartori, M. Campolucci, D. Baranov, M. Zeng, S. Toso, G. Divitini, M. Ferretti, Z. Hens, L. Manna and F. Locardi, Nanoscale, 2022, 14, 305 DOI: 10.1039/D1NR06200J

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