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

作者：Fasasi, Teslim Ayinde; Sin, Ching Man; Taili, Liu; Tsang, Sai Wing^*; Ruotolo, Antonio^*

来源：Optical Materials, 2022, 124: 112011.

DOI：10.1016/j.optmat.2022.112011

• Spin-exchange energy
• Line-shape characteristics
• Perovskites
• Magneto-photocurrent

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 hybridperovskite-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 perovskitebased optoelectronic devices.