Organic electrolumiescent materials and devices

• Main Authors: ZENG, LICHANG, WANG, TINGIH, YAMAMOTO, HITOSHI, WEAVER, MICHAEL S, ALLEYNE, BERT, XIA, CHUANJUN, ADAMOVICH, VADIM
• Format: Patent
• Language: English
• Published: 29.04.2015
• Subjects: ADHESIVES; CHEMISTRY; DYES; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

The invention relates to organic electrolumiescent materials and devices. The invention relates to a composition formed from a first mixture of a first compound and a second compound, wherein chemical structures of the first compound and the second compound are different; the first compound is capable of functioning as a hole transporting material in an organic light emitting device at room temperature; the first compound comprises at least one carbazole group; the first compound has a evaporation temperature T1 of 150 to 350 DEG C; the second compound has evaporation temperature T2 of 150 to 350 DEG C; the absolute value of T1-T2 is less than 20 DEG C; the first compound having a concentration C1 in the first mixture, and the first compound having a concentration C2 in a film formed by evaporating the first mixture in a vacuum deposition tool at a constant pressure between 1x10<-6> Torr to 1x10<-9> Torr, at a 2 angstrom/sec deposition rate on a surface positioned at a predefined distance away from the mixture being evaporated; and the absolute value of (C1-C2)/C1 is less than 5%. The first compound can be a compound shown as the formula (I) for example.