“Parallel+uniaxial” conjugated electrospinning for dual-function analogous-tricolor microfiber film with multicolor emission and magnetism

Abstract

Innovative “parallel+uniaxial” conjugated electrospinning is advanced and utilized to synthesize a unique {[CsPbBr₃/polystyrene (PS)]//[CoFe₂O₄/PS]}||[CsPb(Br_0.06/I_0.94)₃/PS] analogous-tricolor microfiber film (ATMF) with multicolor emission and tunable magnetism. This analogous-tricolor microfiber as a structural element accomplishes three independent microcosmic partitions to assemble CsPbBr₃ perovskite quantum dots (QDs) with green fluorescence, CsPb(Br_0.06/I_0.94)₃ QDs with red fluorescence, and magnetic CoFe₂O₄ into their respective partitions. As a result, the adverse impacts of dark-colored CoFe₂O₄ on the fluorescence of the two perovskite QDs are shunned, and the microcosmic spatial separation of the two kinds of perovskite QDs fully addresses infaust halogen anion exchange between them to receive super fluorescence-magnetic bifuction. The light-emitting diodes (LEDs) packaged using blue chips and ATMF as phosphor exhibit white-light fluorescence. The formation mechanisms of the analogous-tricolor microfiber and ATMF are advanced, and corresponding facile construction techniques are established to shun complex processes. This work provides support for the design and preparation of other multifunctional materials.