Organic EL element having at least one organic light-emitting layers formed of a mixture containing a polymer material and method for manufacturing the organic EL element

摘要

To form stabilized organic light-emitting medium layers using the relief printing method and to provide an organic EL element excellent in terms of pattern-forming accuracy, film thickness uniformity and light-emitting characteristics, a substrate 2, first electrode layers 3 provided on the substrate 2, organic light-emitting medium layers 5 which are provided on the first electrode layers 3 and emit light when electrically connected, and second electrodes 6 which are provided on the organic light-emitting medium layers 5 and make the organic light-emitting medium layers 5 electrically connected when voltage is applied between the first electrodes 3 and the second electrodes are provided. In addition, at least one of the organic light-emitting medium layers 5 is formed of a mixture containing a polymer material having a weight-average molecular weight in a range of 1.5 million to 25 million and at least one low molecular material having a non-repetitive structure. Also, the mixing ratio between the polymer material and the low molecular material is set in a range of 0.05:1 to 0.5:1 in terms of weight ratio.

主权项

1. An organic EL element comprising:
a substrate; first electrode layers provided on the substrate; organic light-emitting medium layers provided on the first electrode layers and emitting light when electrically connected; and second electrodes provided on the organic light-emitting medium layers to make the organic light-emitting medium layers electrically connected when voltage is applied between the first electrodes and the second electrodes, wherein at least one of the organic light-emitting medium layers is formed of a mixture containing a non-conductive polymer material having a weight-average molecular weight in a range of 1.5 million to 25 million and at least one low molecular material having a non-repetitive structure and having a weight-average molecular weight in a range of 100 to 3000.