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:
Feb. 25, 2020
Filed:
Feb. 24, 2017
Samsung Display Co., Ltd., Yongin-si, Gyeonggi-do, KR;
Samsung Display Co., Ltd., Yongin-si, KR;
Abstract
An organic light-emitting device including an anode electrode, a hole injection layer on the anode electrode, a hole transport layer on the hole injection layer, an emissive layer on the hole transport layer, and a cathode electrode on the emissive layer. A material of the hole injection layer includes a nitrogen-containing compound having a quinoid structure and a nitrogen-containing compound having a benzenoid structure. A ratio of a peak intensity Ito a peak intensity I(I/I) in a Fourier transform infrared spectroscopy (FTIR) spectrum of the material of the hole injection layer ranges from 1.5 to 2.5, the peak intensity Iand the peak intensity Ibeing further defined.