Electroluminescence element
Disclosed herein is an electroluminescence element that is excellent in color rendering properties and has a long service life as a white light-emitting element, that is, high durability. The electroluminescence element ( 100 ) includes: a substrate ( 1 ); a first electrode ( 2 ); a functional layer ( 20 ) including at least one light-emitting layer ( 5 ); and a second electrode ( 8 ), wherein the at least one light-emitting layer ( 5 ) contains a quantum dot material ( 11 ), and wherein when a particle size at a cumulative frequency of 10% and a particle size at a cumulative frequency of 90% in a volume-based cumulative particle size distribution of the quantum dot material ( 11 ) are defined as d10 (nm) and d90 (nm), respectively, the quantum dot material ( 11 ) satisfies d90−d10≧3 nm.
1. An electroluminescence element comprising:
a substrate;
a first electrode;
a functional layer including at least one light-emitting layer; and
a second electrode, wherein
the at least one light-emitting layer contains a quantum dot material, and
when a particle size at a cumulative frequency of 10% and a particle size at a cumulative frequency of 90% in a volume-based cumulative particle size distribution of the quantum dot material are defined as d10 (nm) and d90 (nm), respectively, the quantum dot material satisfies d90−d10≧3 nm.
2. The electroluminescence element according to claim 1 , wherein the quantum dot material satisfies d90−d10≧5 nm.
3. The electroluminescence element according to claim 2 , wherein when a half width of a maximum peak in the volume-based particle size distribution is defined as t (nm), the quantum dot material satisfies t/(d90−d10)>0.5.
4. The electroluminescence element according to claim 2 , wherein the quantum dot material comprises a core and a shell surrounding the core.
5. The electroluminescence element according to claim 2 , wherein the quantum dot material is surface-modified with a surface modifier.
6. The electroluminescence element according to claim 1 , wherein when a half width of a maximum peak in the volume-based particle size distribution is defined as t (nm), the quantum dot material satisfies t/(d90−d10)>0.5.
7. The electroluminescence element according to claim 6 , wherein the quantum dot material comprises a core and a shell surrounding the core.
8. The electroluminescence element according to claim 6 , wherein the quantum dot material is surface-modified with a surface modifier.
9. The electroluminescence element according to claim 1 , wherein the quantum dot material comprises a core and a shell surrounding the core.
10. The electroluminescence element according to claim 9 , wherein the quantum dot material is surface-modified with a surface modifier.
11. The electroluminescence element according to claim 1 , wherein the quantum dot material is surface-modified with a surface modifier.