Patent ID: 11939293
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 4:
5. The composition of claim 2, wherein the first compound has an evaporation temperature T1 of 150 to 350° C.;
wherein the second compound has an evaporation temperature T2 of 150 to 350° C.;
wherein the absolute value of T1-T2 is less than 20° C.;
wherein a ratio stability in a film formed by evaporating the mixture in a vacuum deposition tool at a constant pressure between 1×10−6 Torr to 1×10−9 Torr, at a 2 Å/sec deposition rate on a surface position at a predefined distance away from the mixture being evaporated is equal to or less than 1.