Organic electroluminescent element having a transition-metal-complex layer, and display and electronic apparatus including the same
View Patent ↗An organic electroluminescent element includes an electron-transport layer composed of a heterocyclic compound, a negative electrode composed of a metal material, and a transition-metal-complex layer arranged between the electron-transport layer and the negative electrode.
1. An organic electroluminescent element comprising:
an electron-transport layer composed of a heterocyclic compound;
a negative electrode composed of a metal material; and
a transition-metal-complex layer between the electron-transport layer and the negative electrode,
wherein,
the transition-metal-complex layer has a thickness of 2 nm or less.
2. The organic electroluminescent element according to claim 1 , wherein the transition-metal-complex layer is composed of a transition-metal complex with a central metal that has a coordination number of two or more.
3. The organic electroluminescent element according to claim 1 , wherein the heterocyclic compound constituting the electron-transport layer is a nitrogen-containing cyclic compound.
4. The organic electroluminescent element according to claim 1 , wherein the negative electrode is transflective.
5. The organic electroluminescent element according to claim 1 , further comprising: a protective film on the negative electrode.
6. A display comprising:
a substrate; and
organic electroluminescent elements on the substrate, each of the organic electroluminescent elements including an electron-transport layer composed of a heterocyclic compound, a negative electrode composed of a metal material, and a transition-metal-complex layer between the electron-transport layer and the negative electrode,
wherein,
the transition-metal-complex layer has a thickness of 2 nm or less.
7. An electronic apparatus comprising:
a substrate; and
organic electroluminescent elements on the substrate, each of the organic electroluminescent elements including an electron-transport layer composed of a heterocyclic compound, a negative electrode composed of a metal material, and a transition-metal-complex layer between the electron-transport layer and the negative electrode,
wherein,
the transition-metal-complex layer has a thickness of 2 nm or less.