Light emitting device manufacturing method and apparatus thereof
A light emitting device includes a first type carrier transportation layer and an organic light emitting unit over the first type carrier transportation layer. The light emitting device further includes a second type carrier transportation layer over the organic light emitting unit, wherein the second type is opposite to the first type. At least one of the first type carrier transportation layer and the second type carrier transportation layer includes a metal element.
1. A light emitting device, comprising:
a substrate;
an array of organic light emitting units over the substrate;
a secondary light emitting unit adjacent to one of the organic light emitting units in the array, wherein the secondary light emitting unit includes a second height and the one of the organic light emitting units in the array includes a first height, the second height is smaller than the first height;
wherein the organic light emitting units in the array has a gap with an aspect ratio, wherein the aspect ratio is correlated to a height ratio between the secondary light emitting unit and an organic light emitting unit adjacent to the secondary light emitting unit.
2. The light emitting device in claim 1 , further comprising a first type carrier transportation layer under the array of organic light emitting units and the secondary light emitting unit.
3. The light emitting device in claim 2 , wherein the first type carrier transportation layer is a composite structure.
4. The light emitting device in claim 1 , wherein the secondary light emitting unit is in a strip shape.
5. The light emitting device in claim 1 , wherein the secondary light emitting unit is in a circular shape.
6. The light emitting device in claim 1 , wherein the secondary light emitting unit is in a quadrilateral shape.
7. The light emitting device in claim 1 , further comprising a second type carrier transportation layer over the array of organic light emitting units.
8. The light emitting device in claim 7 , wherein the second type carrier transportation layer is a composite structure.
9. The light emitting device in claim 1 , further comprising a carrier transportation layer commonly shared by at least two of the organic light emitting units in the array.
10. The light emitting device in claim 1 , further comprising a first carrier transportation layer and a second type carrier transportation layer, wherein at least one of the first type carrier transportation layer and the second type carrier transportation layer includes a metal element.
11. The light emitting device in claim 10 , wherein the metal element is a transition metal.
12. The light emitting device in claim 1 , wherein at least one of the organic light emitting units in the array has a width being not greater than 2 um.
13. The light emitting device in claim 1 , wherein the substrate has a minimum bend radius being not greater than 10 mm.
14. A method of manufacturing a light emitting device, comprising:
providing a substrate;
forming a first type carrier transportation layer over the substrate;
forming a metallic layer on the first type carrier transportation layer;
treating the surface of the metallic layer thereby driving a metallic element from the metallic layer into the first type carrier transportation layer;
forming a photo sensitive organic light emitting layer over the first type carrier transportation layer; and
patterning the photo sensitive organic light emitting layer to form a light emitting unit.
15. The method of manufacturing a light emitting device in claim 14 , wherein the metallic layer includes a transition metal.
16. The method of manufacturing a light emitting device in claim 14 , wherein treating the surface of the metallic layer includes one of heating, microwave, or plasma treatment.
17. The method of manufacturing a light emitting device in claim 14 , further comprising a first type carrier injection layer between the first type carrier transportation layer and the substrate.
18. A light emitting device, comprising: a substrate; and a first light emitting unit and a second light emitting unit over the substrate, wherein the second light emitting unit includes a second height and the one of the first light emitting units includes a first height, wherein a gap is between the first light emitting unit and the second light emitting unit and the gap has an aspect ratio, wherein the aspect ratio is correlated to a height ratio between the first light emitting unit and the second light emitting unit.
19. The light emitting device in claim 18 , further comprising a carrier transportation layer in the substrate.
20. The light emitting device in claim 19 , wherein the carrier transportation layer includes a metal element.