Effect of the magnetic order on the magneto-photocurrent of organo-metal halide perovskites

Teslim Ayinde Fasasi; Ching Man Sin; Liu Taili; Sai Wing Tsang; Antonio Ruotolo

doi:10.1016/j.optmat.2022.112011

Author(s)

Related Research Unit(s)

Department of Materials Science and Engineering

Detail(s)

Original language	English
Article number	112011
Journal / Publication	Optical Materials
Volume	124
Online published	5 Feb 2022
Publication status	Published - Feb 2022

Link(s)

DOI	DOI https://doi.org/10.1016/j.optmat.2022.112011 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85123917043&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(4118e396-e63b-4109-ae26-37e140045e49).html

Abstract

The optical properties of perovskite materials are spin dependent. Therefore, tuning the spin-exchange energy in perovskite materials can provide a way towards improving their photovoltaic and light-emission performances. In this study, the effect of an externally applied magnetic field on the magneto-photocurrent of hybrid-perovskite-based devices was investigated. We show that a magnetic field can be used to tune the short-range exchange energy of excited states, which results in a negative magneto-photocurrent. Besides, doping perovskite with manganese provides an additional way to tune the long-range spin-exchange energy between the excited states through the formation of polarons. This can lead to an increase of the performance of perovskite-based optoelectronic devices.