The effect of room temperature magnetic field on photoluminescence of Mn:CsPbBr_(3) quantum dots prepared by one-pot method in air  

作　　者：Mengwei Chen Chenguang Shen Wei Huang Yingping Yang Jie Shen 

机构地区：[1]Department of Physics,School of Physics and Mechanics,Wuhan University of Technology,Wuhan 430070,China [2]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Nano Research》2025年第4期561-568,共8页纳米研究(英文版)

基　　金：supported by the Hubei province Natural Science Fund for Distinguished Young Scholars(No.201CFA077);Hubei province“Chu Tian Talent”scientific and technological innovation team.

摘　　要：The generation and manipulation of spin-polarized electrons at room temperature are essential for the development of advanced spin-optoelectronic devices.In this work,a one-pot method was used to successfully synthesize homogenous Mn:CsPbBr_(3) perovskite quantum dots in air with particle sizes of 7−8 nm.The effects of Mn doping on the structure,optical and magnetic properties of CsPbBr_(3) quantum dots were investigated.The findings demonstrated proper Mn doping improved the crystallinity and photoluminescence(PL)of quantum dots.The prepared quantum dots have a narrow full width at half maximum emission(FWHM)of about 17−20 nm.The magnetic properties of the doped samples and the effect of the magnetic field on the PL spectra properties were analyzed.The results show that trace Mn doping can improve the room-temperature ferromagnetism of CsPbBr_(3) quantum dots.Doping with magnetic elements makes CsPbBr_(3) quantum dots more responsive to the applied magnetic field.Even at a lower 50 mT magnetic field,the PL peak of Mn:CsPbBr_(3) still declined 5.91%.Mn:CsPbBr_(3) quantum dots are a new type of multifunctional material that is beneficial to spintronics research.This work demonstrates a low-cost synthesis method.It should make all-inorganic perovskite quantum dots a promising material for room-temperature spin optoelectronic devices.

关 键 词：CsPbBr_(3)quantum dots Mn doping one-pot method FERROMAGNETISM magnetic field 

分 类 号：O469[理学—凝聚态物理]