DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME
According to one embodiment, a display device includes a first anode, a cathode opposing the first anode and a first organic layer located between the first anode and the cathode, and the first organic layer includes a first light emitting layer and a hole transport layer located between the first anode and the first light emitting layer, and an average particle diameter per unit area of a material which constitutes the first light emitting layer is smaller than an average particle diameter per unit area of a material which constitutes the hole transport layer.
1 . A display device comprising:
a first anode;
a cathode opposing the first anode; and
a first organic layer located between the first anode and the cathode, wherein
the first organic layer includes a first light emitting layer and a hole transport layer located between the first anode and the first light emitting layer, and
an average particle diameter per unit area of a material which constitutes the first light emitting layer is smaller than an average particle diameter per unit area of a material which constitutes the hole transport layer.
2 . The display device of claim 1 , wherein
the average particle diameter per unit area of the material which constitutes the first light emitting layer is 39 nm or less.
3 . The display device of claim 1 , wherein
at least one of the hole transport layer and the first light emitting layer is formed at a deposition rate of 0.12 nm per second or higher.
4 . The display device of claim 1 , wherein
at least one of the hole transport layer and the first light emitting layer is formed at a deposition rate of 0.17 nm per second or higher.
5 . The display device of claim 1 , further comprising:
a second anode spaced apart from the first anode;
a third anode spaced apart from the first anode and the second anode;
a second organic layer located between the second anode and the cathode and including a second light emitting layer formed of a material different from that of the first light emitting layer; and
a third organic layer located between the third anode and the cathode and including a third light emitting layer formed of a material different from those of the first light emitting layer and the second light emitting layer,
wherein
the second light emitting layer and the third light emitting layer are formed at a deposition rate of 0.12 nm per second or higher.
6 . The display device of claim 5 , wherein
the second light emitting layer and the third light emitting layer are formed at a deposition rate of 0.17 nm per second or higher.
7 . The display device of claim 1 , wherein
the first light emitting layer contains fluorescent molecules which emit blue fluorescence.
8 . The display device of claim 1 , wherein
the first light emitting layer contains phosphorescent molecules which emit green phosphorescence.
9 . The display device of claim 1 , wherein
the first light emitting layer contains phosphorescent molecules which emit red phosphorescence.
10 . A method of manufacturing a display device, comprising:
forming a first anode;
forming a first organic layer on the first anode; and
forming a cathode on the first organic layer, wherein
the forming the first organic layer comprises:
forming a hole transport layer; and
forming a first light emitting layer,
the hole transport layer is located between the first anode and the first light emitting layer, and
at least one of the hole transport layer and the first light emitting layer is formed at a deposition rate of 0.12 nm per second or higher.
11 . The method of claim 10 , wherein
at least one of the hole transport layer and the first light emitting layer is formed at a deposition rate of 0.17 nm per second or higher.
12 . The method of claim 10 , further comprising:
forming, when forming the first anode, a second anode spaced apart from the first anode and a third anode spaced apart from the first anode and the second anode, simultaneously;
forming a second organic layer on the second anode before forming the cathode; and
forming a third organic layer on the third anode before forming the cathode, wherein
the forming the second organic layer comprises forming a second light emitting layer,
the forming the third organic layer comprises forming a third light emitting layer, and
the second light emitting layer and the third light emitting layer are formed at a deposition rate of 0.12 nm per second or higher.
13 . The method of claim 12 , wherein
the second light emitting layer and the third light emitting layer are formed at a deposition rate of 0.17 nm per second or higher.
14 . The method of claim 10 , wherein
the first light emitting layer contains fluorescent molecules which emit blue fluorescence.
15 . The method of claim 10 , wherein
the first light emitting layer contains phosphorescent molecules which emit green phosphorescence.
16 . The method of claim 10 , wherein
the first light emitting layer contains phosphorescent molecules which emit red phosphorescence.