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 T1 and T2, respectively, of 150 to 350° C., and the absolute value of T1−T2 can be less than 20° C. The first compound can have a concentration C1 in the mixture and a concentration C2 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 positioned at a predefined distance away from the mixture being evaporated, where the absolute value of (C1−C2)/C1 is less than 5%.
The invention relates to compounds with benzindenofluorene base bodies having a structure of formula (I):
and to the use thereof in electronic devices, in particular in organic electroluminescent devices.
This invention discloses a novel multicomponent system or a single compound that is capable of performing triplet-triplet annihilation up conversion process. (TTA-UC) A solution or solid film that comprises this TTA-UC system or compound is provided. This system or compound can be used in an optical or optoelectronic device.
This invention discloses a novel multicomponent system or a single compound that is capable of performing triplet-triplet annihilation up conversion process. (TTA-UC) A solution or solid film that comprises this TTA-UC system or compound is provided. This system or compound can be used in an optical or optoelectronic device.
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES
申请人:Universal Display Corporation
公开号:US20160149139A1
公开(公告)日:2016-05-26
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 T
1
and T
2
, respectively, of 150 to 350° C., and the absolute value of T
1
−T
2
can be less than 20° C. The first compound can have a concentration C
1
in the mixture and a concentration C
2
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 positioned at a predefined distance away from the mixture being evaporated, where the absolute value of (C
1
−C
2
)/C
1
is less than 5%.