2D layered perovskite containing functionalised benzothieno-benzothiophene molecules

Formation, degradation, optical properties and photoconductivity

Journal article (2020)

Authors

Wouter T.M. Van Gompel University of Hasselt
Roald Herckens University of Hasselt
Paul Henry Denis University of Hasselt
Martijn Mertens University of Hasselt
M.C. Gelvez Rueda ChemE/Opto-electronic Materials - AS
Kristof Van Hecke Universiteit Gent
Bart Ruttens IMEC-Solliance
Jan D’Haen IMEC-Solliance
F.C. Grozema ChemE/Opto-electronic Materials - AS
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Research Group
ChemE/Opto-electronic Materials (AS) (TU Delft)
Copyright: © 2020 Wouter T.M. Van Gompel, Roald Herckens, Paul Henry Denis, Martijn Mertens, M.C. Gelvez Rueda, Kristof Van Hecke, Bart Ruttens, Jan D’Haen, F.C. Grozema, More Authors
DOI: https://doi.org/10.1039/d0tc01053g
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Published Date

2020

Language

English

Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Opto-electronic Materials

Abstract

2D layered hybrid perovskites are currently in the spotlight for applications such as solar cells, light-emitting diodes, transistors and photodetectors. The structural freedom of 2D layered perovskites allows for the incorporation of organic cations that can potentially possess properties contributing to the performance of the hybrid as a whole. In this study, we incorporated a benzothieno[3,2-b]benzothiophene (BTBT) alkylammonium cation into the organic layer of a 2D layered lead iodide perovskite. The formation and degradation of this material are discussed in detail. It is shown that the use of a solvent vapour annealing method significantly enhances the absorption, emission and crystallinity of films of this 2D layered perovskite as compared to regular thermal annealing. The photoconductivity of the films was determined using time-resolved microwave conductivity (TRMC) as well as in a device. In both cases, the solvent vapour annealed films show markedly higher photoconductivity than the films obtained using the regular thermal annealing approach.