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Tuning Magnetism and Photocurrent in Mn-Doped Organic–Inorganic Perovskites

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journal contribution
posted on 18.03.2020 by Lixia Ren, Yutao Wang, Min Wang, Shuanhu Wang, Yang Zhao, Claudio Cazorla, Changle Chen, Tom Wu, Kexin Jin
Organic–inorganic perovskites have attracted increasing attention in recent years owing to their excellent optoelectronic properties and photovoltaic performance. In this work, the prototypical hybrid perovskite CH3NH3PbI3 is turned into a ferromagnetic material by doping Mn, which enables simultaneous control of both charge and spin of electrons. The room-temperature ferromagnetism originates from the double exchange interaction between Mn2+–I–Mn3+ ions. Furthermore, it is discovered that the magnetic field can effectively modulate the photovoltaic properties of Mn-doped perovskite films. The photocurrent of Mn-doped perovskite solar cells increases by 0.5% under a magnetic field of 1 T, whereas the photocurrent of undoped perovskite decreases by 3.3%. These findings underscore the potential of Mn-doped perovskites as novel solution-processed ferromagnetic material and promote their application in multifunctional photoelectric-magnetic devices.

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