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, Chia-Chun Chen, Chun-Wei Chen, Chun-Wei Chen
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.