The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 2021
Filed:
Dec. 05, 2018
Nanjing University of Technology, Jiangsu, CN;
NANJING UNIVERSITY OF TECHNOLOGY, Jiangsu, CN;
Abstract
The disclosure discloses a perovskite film layer, a device and a preparation method for effectively improving the efficiency of perovskite optoelectronics. The perovskite film layer consists of a layer with discontinuous, irregularly distributed perovskite crystal grains and an organic insulating layer with a low refractive index embedded between the perovskite crystal grains. The perovskite crystal grains form a plurality of convex portions, and the organic insulating layer forms a plurality of concave portions between the convex portions. By adding an excess of an alkylammonium salt and/or an organic molecule with a specific functional group to perovskite precursor solution, a concave-convex film layer structure is spontaneously formed, and an upper charge transport layer and an electrode form pleated concave-convex structures. Such a special perovskite thin film structure formed by a simple solution method can effectively improve the light-outcoupling efficiency and enhance the performance of the perovskite light-emitting device.