Organic electrolumiescent materials and devices
A composition formed of a first mixture of a first compound and a second compound wherein the first compound has different chemical structure than the second compound; the first compound is capable of functioning as a hole transporting material in an organic light emitting device at room temperature...
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Main Authors | , , , , , , |
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Format | Patent |
Language | English French German |
Published |
29.04.2015
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Subjects | |
Online Access | Get full text |
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Summary: | A composition formed of a first mixture of a first compound and a second compound wherein the first compound has different chemical structure than the second compound; 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 °C; the second compound has evaporation temperature T2 of 150 to 350 °C; the absolute value of T1-T2 is less than 20 °C; the first compound having a concentration C1 in said 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 2Å/sec deposition rate on a surface positioned at a predefined distance away from the mixture being evaporated; and wherein the absolute value of (C1-C2)/C1 is less than 5%. |
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Bibliography: | Application Number: EP20140189545 |