Issue 7, 2018

Rb+ cations enable the change of luminescence properties in perovskite (RbxCs1−xPbBr3) quantum dots

Abstract

All-inorganic metal halide perovskites of the formulation ABX3 (where A is Cs+, B is commonly Pb2+, and X is a halide, X = Cl, Br, I) have been studied intensively for their unique properties. Most of the current studies focus on halogen exchange to modify the luminescence band gap. Herein we demonstrate a new avenue for changing the band gap of halide perovskites by designing mixed-monovalent cation perovskite-based colloidal quantum dot materials. We have synthesized monodisperse colloidal quantum dots of all-inorganic rubidium–cesium lead halide perovskites (APbBr3, A = mixed monovalent cation systems Rb/Cs) using inexpensive commercial precursors. Through the compositional modulation, the band gap and emission spectra are readily tunable over the visible spectral range of 474–532 nm. The photoluminescence (PL) of RbxCs1−xPbBr3 nanocrystals is characterized with excellent (NTCS color standard) wide color gamut coverage, which is similar to the cesium lead halide perovskites (CsPbX3, X = mixed halide systems Cl/Br), and narrow emission line-widths of 27–34 nm. Furthermore, simulated lattice models and band structures are used to explain the band gap variations.

Graphical abstract: Rb+ cations enable the change of luminescence properties in perovskite (RbxCs1−xPbBr3) quantum dots

Supplementary files

Article information

Article type
Paper
Submitted
19 out 2017
Accepted
12 jan 2018
First published
15 jan 2018

Nanoscale, 2018,10, 3429-3437

Rb+ cations enable the change of luminescence properties in perovskite (RbxCs1−xPbBr3) quantum dots

H. Wu, Y. Yang, D. Zhou, K. Li, J. Yu, J. Han, Z. Li, Z. Long, J. Ma and J. Qiu, Nanoscale, 2018, 10, 3429 DOI: 10.1039/C7NR07776A

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