Abstract: A solution phase synthesis process for preparing a rare earth perovskite, the process includes reacting an alkali metal material with a first surfactant ligand in the presence of a first solvent to obtain a first precursor complex solution; reacting a rare earth metal halide with a second surfactant ligand in the presence of a second solvent to obtain a second precursor complex solution; and reacting the first precursor complex solution with the second precursor complex solution in the presence of a third surfactant ligand and a third solvent to obtain the rare earth perovskite; wherein: the rare earth perovskite is in the form of nanocrystals; and the first solvent and third solvent comprise a non-coordinating solvent.

Abstract: A solution phase synthesis process for preparing a rare earth perovskite, the process includes reacting an alkali metal material with a first surfactant ligand in the presence of a first solvent to obtain a first precursor complex solution; reacting a rare earth metal halide with a second surfactant ligand in the presence of a second solvent to obtain a second precursor complex solution; and reacting the first precursor complex solution with the second precursor complex solution in the presence of a third surfactant ligand and a third solvent to obtain the rare earth perovskite; wherein: the rare earth perovskite is in the form of nanocrystals; and the first solvent and third solvent comprise a non-coordinating solvent.

Abstract: Disclosed is a control method for a digital ink-jet printing device to carry out multicolor ink-jet printing on an intermittent rotary printing device. The method includes: determining whether a current page is the first page; if yes, calculating a length of an image to be printed on the current page by subtracting a distance between an imaging component group and a reference from a length of a page, wherein the reference is the foremost printing imaging component group in a movement direction of a printed body, and acquiring image data of the current page, the length of which is the calculated length, after delaying the distance; if no, acquiring unprinted image data of a previous page, the length of which is the distance, and image data of the current page, the length of which is the calculated length.

Abstract: Disclosed is a control method for a digital ink-jet printing device to carry out multicolor ink-jet printing on an intermittent rotary printing device. The method includes: determining whether a current page is the first page; if yes, calculating a length of an image to be printed on the current page by subtracting a distance between an imaging component group and a reference from a length of a page, wherein the reference is the foremost printing imaging component group in a movement direction of a printed body, and acquiring image data of the current page, the length of which is the calculated length, after delaying the distance; if no, acquiring unprinted image data of a previous page, the length of which is the distance, and image data of the current page, the length of which is the calculated length.