Issue 4, 2020

Exploring the role of halide mixing in lead-free BZA2SnX4 two dimensional hybrid perovskites

Abstract

The role of halide substitution in a lead-free 2D hybrid perovskite is investigated on the BZA2SnX4 (BZA = benzylammonium; X = Cl, Br and I) system, by reporting the synthesis and the structural analysis by means of single-crystal X-ray diffraction data of the two novel compositions BZA2SnBr4 and BZA2SnCl4. In addition, the mixed composition BZA2Sn(BrxI1−x)4 (0 ≤ x ≤ 1) has been prepared by mechanochemical synthesis confirming the existence of a wide solid solubility between the two end-members. The absorption and emission spectra revealed a wide tuning of the band-gap by changing the halide, covering more than 300 nm in the visible range. Combined experimental and DFT calculations provide a complete picture of the electronic and structural properties of the BZA2SnX4 system, revealing a strong influence of the halide on the orientation for the benzylammonium cation, on the hydrogen bonding system within the perovskite network, and on the distortion of the octahedra.

Graphical abstract: Exploring the role of halide mixing in lead-free BZA2SnX4 two dimensional hybrid perovskites

Supplementary files

Article information

Article type
Paper
Submitted
30 окт 2019
Accepted
18 дек 2019
First published
19 дек 2019

J. Mater. Chem. A, 2020,8, 1875-1886

Exploring the role of halide mixing in lead-free BZA2SnX4 two dimensional hybrid perovskites

A. Pisanu, M. Coduri, M. Morana, Y. O. Ciftci, A. Rizzo, A. Listorti, M. Gaboardi, L. Bindi, V. I. E. Queloz, C. Milanese, G. Grancini and L. Malavasi, J. Mater. Chem. A, 2020, 8, 1875 DOI: 10.1039/C9TA11923J

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