Organic light-emitting device and organic display device
Light emitters are two-dimensionally disposed along a main surface of the substrate. The light emitters each include: a first electrode; an organic light-emitting layer; an intermediate layer; a charge transport layer; and a second electrode. Such layers are disposed in the stated order with the first electrode closest to the substrate. The intermediate layer contains a fluoride of an alkali metal or a fluoride of an alkaline earth metal. The charge transport layer contains an organic material doped with an alkali metal or an alkaline earth metal. The light emitters are partitioned from one another by first banks extending in one direction along the main surface of the substrate and second banks extending in a direction intersecting the one direction. Surface portions of the first banks facing the light emitters have greater liquid repellency than surface portions of the second banks facing the light emitters.
1. An organic light-emitting device comprising:
a substrate; and
light emitters two-dimensionally disposed along a main surface of the substrate, wherein
the light emitters each include, along a first direction intersecting the main surface of the substrate:
a first electrode disposed on or above the substrate;
an organic light-emitting layer disposed on or above the first electrode;
an intermediate layer disposed on or above the organic light-emitting layer;
a charge transport layer disposed on the intermediate layer; and
a second electrode disposed on or above the charge transport layer,
the intermediate layer contains a fluoride of an alkali metal or a fluoride of an alkaline earth metal,
the charge transport layer contains an organic material doped with an alkali metal or an alkaline earth metal,
the organic light-emitting device further comprises:
first banks partitioning the light emitters from one another along a second direction that is one direction along the main surface of the substrate, and extending in a third direction that is one direction along the main surface of the substrate and that intersects the second direction; and
second banks partitioning the light emitters from one another along the third direction, and extending in the second direction, and
the first banks and the second banks each contain an electrically-insulative material, and surface portions of the first banks facing the light emitters have greater liquid repellency than surface portions of the second banks facing the light emitters.
2. The organic light-emitting device of claim 1 , wherein
along the first direction, a height of the first banks is greater than a height of the second banks.
3. The organic light-emitting device of claim 2 further comprising
an electrically-insulating layer disposed between the substrate and the first electrode, wherein
the height of the first banks and the height of the second banks are heights from a top surface of the electrically-insulating layer.
4. The organic light-emitting device of claim 2 , wherein
at intersections of the first banks and the second banks, the first banks are on the second banks.
5. The organic light-emitting device of claim 2 , wherein
along the first direction, the height of the second bank is 40% to 70% the height of the first banks.
6. The organic light-emitting device of claim 2 , wherein
0.20L P ≦W 2B ≦0.30L P holds true, where
L P denotes a length along the third direction of each of the light emitters in a plan view of said each of the light emitters from the first direction, and
W 2B denotes a width along the third direction of each of the second banks in a plan view of said each of the second banks from the first direction.
7. The organic light-emitting device of claim 2 , wherein
0.20L P ≦W 2B ≦0.25L P holds true, where
L P denotes a length along the third direction of each of the light emitters in a plan view of said each of the light emitters from the first direction, and
W 2B denotes a width along the third direction of each of the second banks in a plan view of said each of the second banks from the first direction.
8. The organic light-emitting device of claim 1 , wherein
the first banks and the second banks are formed integrally.
9. The organic light-emitting device of claim 8 , wherein
along the first direction, a height of the first banks is equal to a height of the second banks.
10. The organic light-emitting device of claim 1 , wherein
the surface portions of the first banks facing the light emitters have greater liquid repellency than the surface portions of the second banks facing the light emitters, with respect to ink for the organic light-emitting layer.
11. The organic light-emitting device of claim 1 , wherein
the intermediate layer contains a fluoride of sodium, and
the charge transport layer contains an organic material doped with barium.
12. An organic display device comprising:
a display panel; and
a control/drive circuit connected to the display panel, wherein
the display panel has the structure of the organic light-emitting device of claim 1 .