Issue 23, 2024

Multifunctional ammonium salts synergizing etching and passivation capability enable efficient deep-blue CsPbBr3 nanoplates

Abstract

Two-dimensional CsPbBr3 nanoplates (NPLs) are highly promising blue emitters due to their precisely tunable emission wavelength by adjusting the thickness. However, synthesizing high-performance deep-blue emissive CsPbBr3 NPLs with fewer monolayers remains challenging. Here, multifunctional ligands of 2,6-diaminopyridinium hydrobromide (DaPyBr) with multiple coordination sites were designed and synthesized to attenuate the thickness of blue CsPbBr3 NPLs and suppress surface defects. DaPyBr serving both as a Lewis acid and a Lewis base possesses the dual functions of etching and passivation. It can detach the outer defect layers of CsPbBr3 NPLs reducing the thickness to 3 monolayers and passivate inner [PbBr6]4− layers suppressing the surface defects. Ultimately, CsPbBr3 NPLs treated by DaPyBr achieved a near-unity photoluminescence quantum yield at 456 nm. The target NPLs gained long-term storage stability and outstanding resistance to polar solvents. A bright deep-blue pattern display with commendable luminescence stability is achieved via aerosol printing technology.

Graphical abstract: Multifunctional ammonium salts synergizing etching and passivation capability enable efficient deep-blue CsPbBr3 nanoplates

Supplementary files

Article information

Article type
Paper
Submitted
29 Mar 2024
Accepted
16 May 2024
First published
17 May 2024

J. Mater. Chem. C, 2024,12, 8302-8308

Multifunctional ammonium salts synergizing etching and passivation capability enable efficient deep-blue CsPbBr3 nanoplates

Y. Wang, S. Wang, Z. Qin, J. Zhou, S. Gu, X. Li and H. Liu, J. Mater. Chem. C, 2024, 12, 8302 DOI: 10.1039/D4TC01261E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements