Organic EL device, method for manufacturing the same, and electronic apparatus
An organic EL device has a pixel including a red, a green and a blue sub-pixel. The organic EL device includes anodes disposed in the sub-pixels, and a cathode. A red luminescent layer is formed by liquid application between the anode and the cathode, and a green luminescent layer is formed by liquid application between the anode and the cathode. A blue luminescent layer is formed by vapor deposition over the entire region of the red, green and blue sub-pixels between the red and green luminescent layers and the cathode, and between the anode and the cathode in the blue sub-pixel. An infrared luminescent layer is formed by vapor deposition over the entire region of the red, green and blue sub-pixels between the red and green luminescent layers and the blue luminescent layer, and between the anode and the blue luminescent layer in the blue sub-pixel.
1. An organic EL device having a pixel including sub-pixels; the organic EL device comprising:
a first anode disposed in a first region intended for a first sub-pixel;
a second anode disposed in a second region intended for a second sub-pixel;
a cathode disposed over the entirety of the first and second regions;
a first luminescent layer formed by liquid application between the first anode and the cathode in the first region, the first luminescent layer emitting light of a first color;
a second luminescent layer formed by vapor deposition over the entirety of the first and second regions, between the first luminescent layer and the cathode and between the second anode and the cathode, the second luminescent layer emitting light of a second color; and
a third luminescent layer disposed at least between the first luminescent layer and the second luminescent layer in the first region, the third luminescent layer mainly emitting light having a wavelength outside the visible region.
2. The organic EL device according to claim 1 , wherein the third luminescent layer emits infrared light.
3. The organic El device according to claim 2 , wherein the third luminescent layer contains a porphyrin complex or a phthalocyanine complex.
4. The organic EL device according to claim 1 , wherein the third luminescent layer is formed by vapor deposition over the entirety of the first and second regions, including the region between the second anode and the second luminescent layer.
5. The organic EL device according to claim 4 , further comprising:
a first hole injection layer disposed between the first anode and the first luminescent layer; and
a second hole injection layer disposed between the second anode and the third luminescent layer,
wherein the distance between the second anode and the second luminescent layer in the second region is shorter than the distance between the first anode and the second luminescent layer in the first region.
6. The organic EL device according to claim 5 , further comprising:
a third anode in a third region intended for a third sub-pixel;
a fourth luminescent layer formed over the third anode by liquid application, the fourth luminescent layer emitting light of a third color; and
a third hole injection layer disposed between the third anode and the fourth luminescent layer,
wherein the cathode is disposed over the entirety of the first, second and third regions such that the fourth luminescent layer is disposed between the third anode and the cathode, and the second and third luminescent layers are disposed over the entirety of the first, second and third regions so as to lie between the fourth luminescent layer and the cathode, and wherein the distance between the second anode and the third luminescent layer in the second region is smaller than the distance between the third anode and the third luminescent layer in the third region.
7. The organic EL device according to claim 6 , wherein the first color is one of red and green, the third color is the other, and the second color is blue.
8. An electronic apparatus comprising the organic EL device as set forth in claim 1 .
9. An electronic apparatus comprising the organic EL device as set forth in claim 2 .
10. An electronic apparatus comprising the organic EL device as set forth in claim 3 .
11. An electronic apparatus comprising the organic EL device as set forth in claim 4 .
12. An electronic apparatus comprising the organic EL device as set forth in claim 5 .
13. An electronic apparatus comprising the organic EL device as set forth in claim 6 .
14. An electronic apparatus comprising the organic EL device as set forth in claim 7 .
15. A method for manufacturing an organic EL device including a first sub-pixel, a second sub-pixel and a third sub-pixel, the method comprising:
forming a first anode in a first region intended for the first sub-pixel;
forming a second anode in a second region intended for the second sub-pixel;
forming a third anode in a third region intended for the third sub-pixel;
forming a first hole injection layer on the first anode;
forming a second hole injection layer on the second anode;
forming a third hole injection layer on the third anode;
forming a first luminescent layer that will emit red light on the first hole injection layer by liquid application;
forming a fourth luminescent layer that will emit green light on the third hole injection layer by liquid application;
forming a third luminescent layer that will mainly emit infrared light layer, by vapor deposition on the first luminescent layer, the second hole injection layer and the fourth luminescent layer over the entirety of the first, second and third regions;
forming a second luminescent layer that will emit blue light, by vapor deposition on the third luminescent layer over the entirety of the first, second and third regions; and
forming a cathode on the second luminescent layer over the entirety of the first, second and third regions.