Light-emitting device, display, and electronic apparatus
A technology for light-emitting elements and display devices, which can be used in electrical components, lighting devices, electroluminescent light sources, etc., and can solve problems such as low durability
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no. 1 Embodiment approach
[0046] FIG. 1 is a longitudinal sectional view schematically showing a first embodiment of a light emitting element of the present invention. It should be noted that, for convenience of description, the upper side in FIG. 1 is referred to as "upper" and the lower side is referred to as "lower".
[0047] A light-emitting element (electroluminescent element) 1 shown in FIG. 1 is a light-emitting element that emits white light by emitting light of R (red), G (green), and B (blue).
[0048] Such a light-emitting element 1 is formed by laminating an anode 3, a hole injection layer 4, a hole transport layer 5, a red light-emitting layer (first light-emitting layer) 6, an intermediate layer 7, and a blue light-emitting layer (second light-emitting layer) in the following order. ) 8, green light-emitting layer (third light-emitting layer) 9, electron transport layer 10, electron injection layer 11 and cathode 12.
[0049] In other words, the light-emitting element 1 is constituted by...
no. 2 Embodiment approach
[0175] Fig. 2 is a longitudinal sectional view schematically showing a second embodiment of the light-emitting element of the present invention. It should be noted that, for convenience of description, the upper side in FIG. 2 is referred to as "upper" and the lower side is referred to as "lower" in the following description.
[0176] The light-emitting element 1A according to this embodiment is the same as the light-emitting element 1 of the first embodiment described above except that the lamination order of each light-emitting layer and the intermediate layer is different.
[0177] That is, in the light-emitting element 1A shown in FIG. The first light-emitting layer) 6 , the intermediate layer 7 , the green light-emitting layer (third light-emitting layer) 9 , the electron transport layer 10 , the electron injection layer 11 , and the cathode 12 are sealed by a sealing member 13 .
[0178]In other words, the light-emitting element 1A is interposed between the anode 3 and ...
Embodiment 1
[0220] First, a transparent glass substrate having an average thickness of 0.5 mm was prepared. Then, an ITO electrode (anode) having an average thickness of 100 nm was formed on the substrate by a sputtering method.
[0221] Then, the substrate was immersed in acetone and 2-propanol in this order, and after ultrasonic cleaning, oxygen plasma treatment was performed.
[0222] Next, HI406 (manufactured by Idemitsu Kosan Co., Ltd.) was vapor-deposited on the ITO electrode by a vacuum deposition method to form a hole injection layer with an average thickness of 40 nm.
[0223] Next, HT320 (manufactured by Idemitsu Kosan Co., Ltd.) was vapor-deposited on the hole injection layer by a vacuum deposition method to form a hole transport layer with an average thickness of 20 nm.
[0224] Next, the constituent materials of the red light-emitting layer were vapor-deposited on the hole transport layer by a vacuum evaporation method to form a red light-emitting layer (first light-emitt...
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