Spin-optoelectronic devices based on hybrid organic-inorganic trihalide perovskites

Abstract

Recently the hybrid organic-inorganic trihalide perovskites have shown remarkable performance as active layers in photovoltaic and other optoelectronic devices. However, their spin characteristic properties have not been fully studied, although due to the relatively large spin-orbit coupling these materials may show great promise for spintronic applications. Here we demonstrate spin-polarized carrier injection into methylammonium lead bromide films from metallic ferromagnetic electrodes in two spintronic-based devices: a ‘spin light emitting diode’ that results in circularly polarized electroluminescence emission; and a ‘vertical spin valve’ that shows giant magnetoresistance. In addition, we also apply a magnetic field perpendicular to the injected spins orientation for measuring the ‘Hanle effect’, from which we obtain a relatively long spin lifetime for the electrically injected carriers. Our measurements initiate the field of hybrid perovskites spin-related optoelectronic applications.

Spintronics of Hybrid Organic–Inorganic Perovskites: Miraculous Basis of Integrated Optoelectronic Devices

“…In recent years, the high efficiency and versatility of HOP‐based devices has drawn considerable research attention . The most important factor that contributes to the high efficiency of these devices is the long carrier transform lifetime (exceeding 1 µs).…”

“…Similar experiments have been performed to introduce two device designs . To emulate the PL process, a special structure was constructed to produce spin‐based electroluminescence.…”

“…This work can be used in applications other than photovoltaic devices. Additional research into spin injection from ferromagnetic electrodes into the HOP MAPbBr 3 was performed the following year …”

“…Copyright 2018, American Physical Society. d–f) Reproduced with permission . Copyright 2019, Springer Nature.…”

“…This is better than the experimental results obtained in 3D materials, which require a high magnetic field to produce such a degree of spin‐polarized PL. In 2019, based on a study of spin injection from ferromagnetic electrodes into the HOP MAPbBr 3 , a spin‐LED device was proposed . The structure of this device is illustrated in Figure d.…”