Influence of Eu-substitution on luminescent CH3NH3PbBr3 quantum dots. Issue 24 (11th June 2018)

• Record Type: Journal Article
• Authors: Liu, Lijia; Li, Jitao; McLeod, John A.
• Is Part Of: Nanoscale. Volume 10:Issue 24(2018)
• Page Start: 11452
• Page End: 11459
• Publication Date: 2018-06-11
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr01656a
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Eu-Substitution in MAPbBr3 reduces toxicity, increases crystallinity, and provides blue photoluminescence. Abstract : We report a series of Eu-substituted methylammonium lead tribromide quantum dots (MAPb1− x Eu x Br3 QDs). The crystallinity of these QDs increases with increasing Eu content, while there is only a small change in the lattice constant, and the morphology of the MAPb1− x Eu x Br3 QDs is unaffected by the Eu content. This demonstrates that Eu is a suitable element for substituting Pb while retaining the original crystal structure. We observe blue photoluminescence (PL) consistent with Eu 2+, which, at high Eu content ( x = 0.3), contributes luminescence intensity equal to the green PL of unsubstituted MAPbBr3 QDs. As Eu is a less toxic substitute for Pb, that also provides blue luminescence, MAPb1− x Eu x Br3 QDs may prove to be a valuable optoelectronic material.