材料科学
钙钛矿(结构)
纳米晶
光致发光
光电子学
化学工程
卤化物
作者
Emanuela Sartori,Marta Campolucci,Dmitry Baranov,Min Zeng,Stefano Toso,Maurizio Ferretti,Zeger Hens,Liberato Manna,Federico Locardi
标识
DOI:10.33774/chemrxiv-2021-d6k2z
摘要
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.
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