PEROVSKITE FILM HAVING CORE-SHELL STRUCTURE, PREPARATION METHOD THEREOF, AND METHOD OF DISPLAYING FLUORESCENCE IN CONTROLLABLE MANNER

• Main Authors: SUN, Baoqun, TAN, Yeshu, SONG, Tao
• Format: Patent
• Language: Chinese; English; French
• Published: 03.09.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

A perovskite film having a core-shell structure, a preparation method thereof, and a method of displaying fluorescence in a controllable manner. The preparation method of the perovskite film having a core-shell structure comprises: reacting a perovskite film with water vapor for 1 to 60 hours in an air environment having a humidity of 10% to 70%, so as to form a protective layer on a surface of the perovskite film and to obtain a perovskite film having a core-shell structure, wherein a perovskite molecule in the perovskite film is selected from one of the following molecules: CsPbCl3, CsPbBr3, CsPbI3, CsPbClxBr3-x(1<x<3), CsPbBrxI3-x (1<x<3), and a doped molecule thereof, a dopant material in the doped molecule comprising at least one of LiCl, LiBr, LiI, BiBr3, BiCl3, BiI3, NaCl, NaBr, NaI, KCl, KBr, KI, RbCl, RbBr, RbI, and MgBr2. L'invention concerne un film de pérovskite ayant une structure cœur-écorce, son procédé de préparation et un procédé d'affichage de fluorescence d'une manière contrôlable. Le procé