Issue 48, 2021

Cage-incorporation of secondary amine in Ruddlesden–Popper 2D hybrid perovskite with strong photoconductivity and polarization response

Abstract

Two-dimensional (2D) Ruddlesden–Popper hybrid perovskites (RPHPs) have shown enormous potential for photoelectric applications owing to their advantages of structural diversity and unique physical properties. Despite extensive studies, the cage-incorporation of secondary amines (e.g., dimethylamine, DMA) to explore 2D RPHPs remains a great challenge. Herein, we present a new member of 2D RPHPs, (BA)2(DMA)Pb2Br7 (1, BA+ = n-butylammonium), for which organic DMA+ cations are enclosed in perovskite cavities. The inorganic perovskite sheets and organic BA+ spacing layers are arranged in the alternate packings, resembling a 2D quantum-well motif. This feature is advantageous for the photoconductivity properties. Consequently, the crystal-based array detectors of 1 exhibit strong photodetection performances, including high detectivity (2.0 × 1011 Jones), large responsivity (31.1 mA W−1), and fast response time (∼8 μs). Moreover, its intrinsic 2D quantum-well structure endows significant anisotropy of conductivity and optical absorption, which account for the strong polarization response with a large dichroic ratio of ∼1.43, falling in the range of other 2D RPHPs. These results reveal the potential of 1 for photodetection and simultaneously shed light on the research on new candidates of 2D RPHPs.

Graphical abstract: Cage-incorporation of secondary amine in Ruddlesden–Popper 2D hybrid perovskite with strong photoconductivity and polarization response

Supplementary files

Article information

Article type
Paper
Submitted
20 oct. 2021
Accepted
11 nov. 2021
First published
12 nov. 2021

J. Mater. Chem. C, 2021,9, 17349-17356

Cage-incorporation of secondary amine in Ruddlesden–Popper 2D hybrid perovskite with strong photoconductivity and polarization response

B. Wang, H. Chen, W. Guo, Y. Liu, S. Han, L. Hua, L. Tang, J. Luo and Z. Sun, J. Mater. Chem. C, 2021, 9, 17349 DOI: 10.1039/D1TC05064H

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