Increasing the Magnetic Transition Dipole Moment of Chiral Perovskite Through Eu3+ Doping

• Published in: Advanced Physics Research Vol. 3; no. 12
• Main Authors: Zeng, Zhichao, Lu, Haolin, Yang, Zhengwei, Wu, Haolin, Zhang, Chuang, Long, Guankui, Du, Yaping
• Format: Journal Article
• Language: English
• Published: Edinburgh John Wiley & Sons, Inc 01.12.2024; Wiley-VCH
• Subjects: 2D chiral perovskite; Anisotropy; Charged particles; Circularly polarized luminescence; Dipole moments; Doping; Europium; Hybrid organic‐inorganic perovskite; Luminescence; Magnetic dipoles; Magnetic transition dipole; Magnetic transitions; Optoelectronics; Perovskites; Photoluminescence; Rare earth doping; Spintronics; Thin films
• DOI: 10.1002/apxr.202400064
• ISSN: 2751-1200

Chiral hybrid organic‐inorganic perovskites (HOIPs) are widely investigated due to their superior chiroptical and chiral spintronic properties. Research on the enhancement of chiroptical performance is highly important for the real application of chiral HOIPs. This work employed a rare earth doping strategy to increase the magnetic transition dipole moment of chiral 2D HOIPs R‐/S‐NPB (NPB = 1‐(1‐naphthyl) ethylammonium lead bromide). Doping with Eu3+ does not change the original layered NPB microstructure, and R‐/S‐NPB‐Eu exhibited the magnetic dipole‐allowed transition luminescence of Eu3+ at 594 nm (5D0→7F1). Circular polarized luminescence (CPL) spectra combined with theoretical calculations and transient photoluminescence measurements indicated that the introduction of Eu3+ can enhance the magnetic transition dipole moment of R‐/S‐NPB, thus resulting in an unprecedented glum of 0.05. To the best of our knowledge, this is the highest value for chiral perovskite films. This work combines the unique and superior optoelectronic properties of rare‐earth ions with chiral perovskite and develops an efficient strategy to increase its anisotropy factor, which can accelerate the development of chiral optoelectronics and spintronics towards real application. In this work, Eu(III) with magnetic dipole‐allowed transitions is first introduced into the chiral perovskite, increasing the magnetic transition dipole moment of chiral 2D perovskite (R‐/S‐NPB‐Eu) films and thereby enhancing their circular dichroism and circularly polarized luminescence performance, resulting in a high anisotropy factor of up to 0.05. This work provides important guidance for developing high‐performance chiral optoelectronic materials.