DataVXAdvanced Functional MaterialsPaper
journal article·2022-10Open access

Exploring the Steric Hindrance of Alkylammonium Cations in the Structural Reconfiguration of Quasi‐2D Perovskite Materials Using a High‐throughput Experimental Platform

Jiyun Zhang, Jianchang Wu, Stefan Langner, Baolin Zhao, Zhiqiang Xie, Jens A. Hauch, Hany A. Afify, Anastasia Barabash, Junsheng Luo, Mykhailo Sytnyk, Wei Meng, Kaicheng Zhang, Chao Liu, Andres Osvet, Ning Li, Marcus Halik, Wolfgang Heiss, Yicheng Zhao, Christoph J. Brabec

Advanced Functional Materials· Volume 32· Issue 43
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Abstract

Abstract Reduced‐dimensional (2D or quasi‐2D) perovskites have recently attracted considerable interest due to their superior long‐term stability. The nature of the intercalating cations plays a key role in determining the physicochemical properties and stability of the quasi‐2D perovskites. Here, the thermal stability of a series of 2D Ruddlesden−Popper (RP) perovskites is studied using seven types of intercalating cations with increasing linear carbon‐chain length from ethylammonium (EA) to n‐dodecylammonium (DA) through a high‐throughput platform. The results show that long‐chain cations in quasi‐2D perovskite films lead to strong steric hindrance between adjacent perovskite domains, thus suppressing Ostwald ripening during the thermal‐aging process. For short‐chain cations, increased‐dimensional phase redistribution during the aging period is observed, which can benefit a concomitant regeneration of the 3D/3D‐like perovskite phases. The impact of steric hindrance on structural reconfiguration and the subsequent phase redistribution in quasi‐2D perovskites are systematically characterized by UV–vis absorption spectra, photoluminescence spectra, and X‐ray diffraction patterns. Due to the steric hindrance effect, an optimal chain length is found to maximize film stability by balancing the water/oxygen resistance and increased‐dimensional phase redistribution. This study provides new insight into the thermal stability of quasi‐2D perovskites.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Helmholtz‐Institute Erlangen‐Nürnberg (HI ERN) Immerwahrstraße 2 91058 Erlangen Germany

Friedrich‐Alexander‐University Erlangen‐Nuremberg Faculty of Engineering Department of Material Science Materials for Electronics and Energy Technology (i‐MEET) Martensstrasse 7 91058 Erlangen Germany

Friedrich‐Alexander‐University Erlangen‐Nuremberg Faculty of Engineering Department of Material Science Organic Materials and Devices (OMD) Institute of Polymer Materials IZNF building, Martens Cauerstrasse 73 91058 Erlangen Germany

Department of Laser Sciences and Interactions National Institute of Laser Enhanced Sciences (NILES) Cairo University Giza 12613 Egypt

University of Electronic Science and Technology of China School of Electronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices Chengdu 611731 P. R. China

State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices School of Materials Science and Engineering South China University of Technology 381 Wushan Road Guangzhou 510640 P. R. China

Friedrich‐Alexander‐University Erlangen‐Nuremberg Faculty of Engineering Department of Material Science Materials for Electronics and Energy Technology (i‐MEET) Energy Campus Nürnberg, Fürther Straße 250 90429 Nürnberg Germany

Funding

China Scholarship Council · Alexander von Humboldt-Stiftung · Deutsche Forschungsgemeinschaft

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