Organic EL element including a hole injection layer with a proportion of sulphur atoms relative to metal atoms

摘要

An organic EL element has an anode and a cathode a light-emitting layer including an organic material provided between the anode and the cathode, a hole injection layer provided between the anode and the light-emitting layer, and a electron injection layer provided between the light-emitting layer and the cathode 7. The hole injection layer and the electron injection layer include metal atoms and sulphur atoms. The sulphur concentration in the hole injection layer and the electron injection layer is no less than 96 ppm and no more than 439 ppm in terms of numerical ratio of sulphur atoms to metal atoms in the hole injection layer.

主权项

1. An organic electroluminescence element, comprising:
a first electrode and a second electrode; a light-emitting layer containing an organic material and provided between the first electrode and the second electrode; and a first functional layer provided between the first electrode and the light-emitting layer, wherein the first functional layer includes metal atoms and sulphur atoms, the first functional layer has a sulphur concentration such that a proportion of the sulphur atoms relative to the metal atoms in the first functional layer is no less than 96 ppm and no more than 439 ppm, and the first functional layer is a hole injection layer.