Issue 24, 2023

Impact of two diammonium cations on the structure and photophysics of layered Sn-based perovskites

Abstract

Layered metal-halide perovskites have shown great promise for applications in optoelectronic devices, where a large number of suitable organic cations give the opportunity to tune their structural and optical properties. However, especially for Sn-based perovskites, a detailed understanding of the impact of the cation on the crystalline structure is still missing. By employing two cations, 2,2′-oxybis(ethylammonium) (OBE) and 2,2′-(ethylenedioxy)bis(ethylammonium) (EDBE), we obtain a planar 〈100〉 and a corrugated 〈110〉-oriented perovskite, respectively, where the hydrogen bonding between the EDBE cations stabilises the corrugated structure. OBESnI4 exhibits a relatively narrow band gap and photoluminescence bands compared to EDBESnI4. In-depth analysis shows that the markedly different optical properties of the two compounds have an extrinsic origin. Interestingly, thin films of OBESnI4 can be obtained both in black and red colours. This effect is attributed to a second crystalline phase that can be obtained by processing the thin films at 100 °C. Our work highlights that the design of the crystal structure as obtained by ligand chemistry can be used to obtain the desired optical properties, whereas thin film engineering can result in multiple crystalline phases unique to Sn-based perovskites.

Graphical abstract: Impact of two diammonium cations on the structure and photophysics of layered Sn-based perovskites

Supplementary files

Article information

Article type
Paper
Submitted
31 Okt 2022
Accepted
04 Jan 2023
First published
05 Jan 2023
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. C, 2023,11, 8154-8160

Impact of two diammonium cations on the structure and photophysics of layered Sn-based perovskites

E. K. Tekelenburg, N. Aledlbi, L. Chen, G. R. Blake and M. A. Loi, J. Mater. Chem. C, 2023, 11, 8154 DOI: 10.1039/D2TC04626A

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, 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 commercial 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