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. 26, 2024
Filed:
Jun. 17, 2019
Universal Display Corporation, Ewing, NJ (US);
Chuanjun Xia, Lawrenceville, NJ (US);
Chun Lin, Yardley, PA (US);
Ting-Chih Wang, Lawrenceville, NJ (US);
UNIVERSAL DISPLAY CORPORATION, Ewing, NJ (US);
Abstract
A composition formed of a mixture of two compounds having similar thermal evaporation properties that are pre-mixed into an evaporation source that can be used to co-evaporate the two compounds into an emission layer in OLEDs via vacuum thermal evaporation process is disclosed. The first and second compounds can have an evaporation temperature Tand T, respectively, of 150 to 350° C., and the absolute value of T-Tcan be less than 20° C. The first compound can have a concentration Cin the mixture and a concentration Cin a film formed by evaporating the mixture in a vacuum deposition tool at a constant pressure between 1×10Torr to 1×10Torr, at a 2 Å/sec deposition rate on a surface positioned at a predefined distance away from the mixture being evaporated, where the absolute value of (C−C)/Cis less than 5%.