External magnetic field-driven circularly polarized luminescence and circularly polarized electroluminescence from optically inactive magnesium phthalocyanine luminophore

This article reports that an achiral optically inactive magnesium(II) phthalocyanine with fluorescent emission properties in the near-infrared region emits far-red-to-near-infrared circularly polarized luminescence (far-red-to-NIR-CPL) when photoexcited under an external magnetic field. Furthermore, the development of an external magnetic field-driven circularly polarized electroluminescence (CPEL) device by embedding the luminophore in the emission layer is detailed. The rotational direction of the optically inactive magnesium(II) phthalocyanine-derived CPL and CPEL can be completely controlled by Faraday geometrical inversion of the applied magnetic field.