journal article·2021-03-03

Strong Excitonic Magneto-Optic Effects in Two-Dimensional Organic–Inorganic Hybrid Perovskites

Tzu-Pei Chen, Jun-Xiao Lin, Cheng-Chieh Lin, Chi-Ying Lin, We-Chen Ke, Di-Yan Wang, Hua-Shu Hsu, Chia-Chun Chen, Chun-Wei Chen

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Abstract

This work demonstrates the strong excitonic magneto-optic (MO) effects of magnetic circular dichroism (MCD) and Faraday rotation (FR) in nonmagnetic two-dimensional (2D) organic–inorganic hybrid Ruddlesden–Popper perovskites (RPPs) at room temperature. Due to their strong and sharp excitonic absorption as a result of unique quantum well structures of 2D RPPs, sizeable linear excitonic MO effects of MCD and FR can be observed at room temperature under a low magnetic field (<1 T) compared with their three-dimensional counterpart. In addition, since the band gaps of 2D organic–inorganic hybrid perovskites can be manipulated either by changing the number n of inorganic octahedral slabs per unit cell or through halide engineering, linear excitonic MO effects of 2D-RPPs can be observed through the broadband spectral ranges of visible light. Our result may pave the way for the promising research field of MO and magneto-optoelectronic applications based on 2D organic–inorganic hybrid perovskites with facile solution processes.
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Research context

OpenAlex topics: Perovskite Materials and Applications · 2D Materials and Applications · Organic and Molecular Conductors Research

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

Affiliations

Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan

Department of Physics, National Taiwan University, Taipei 106, Taiwan

Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica and National Taiwan University, Taipei 115, Taiwan

Department of Applied Physics, National Pingtung University, Pingtung 900, Taiwan

International Graduate Program of Molecular Science and Technology, National Taiwan University (NTU-MST), Taipei 106, Taiwan

Molecular Science and Technology Program, Taiwan International Graduate Program (TIGP) Academia Sinica, Taipei 11529, Taiwan

Department of Chemistry, Tunghai University, Taichung 407, Taiwan

Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan

Center of Atomic Initiative for New Materials (AI-MAT), National Taiwan University, Taipei 106, Taiwan

Funding

Ministry of Education · Ministry of Science and Technology, Taiwan

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