Dmitry Baranov
Associate senior lecturer
Red-emissive nanocrystals of Cs4Mnx Cd1-xSb2Cl12 layered perovskites
Author
Summary, in English
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.
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.
Publishing year
2022
Language
English
Pages
305-311
Publication/Series
Nanoscale
Volume
14
Issue
2
Document type
Journal article
Publisher
Royal Society of Chemistry
Status
Published
ISBN/ISSN/Other
- ISSN: 2040-3364