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:
Nov. 25, 2025
Filed:
Nov. 16, 2021
Samsung Display Co., Ltd., Yongin-si, KR;
Hyeongpil Kim, Yongin-si, KR;
Samsung Display Co., Ltd., Yongin-si, KR;
Abstract
A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the interlayer includes a hole injection layer and a hole transport layer between the first electrode and the emission layer, the hole injection layer directly contacts the first electrode, the hole injection layer has a multi-layered structure of at least two different layers that are stacked on each other, the hole injection layer includes at least one inorganic material of a post-transition metal, a metalloid, a compound including at least two post-transition metal elements, a compound including at least two metalloid elements, or a compound including a post-transition metal element and a metalloid element, the post-transition metal and the metalloid are described herein.