Display device including a bending region and non-bending regions
A display device, including a substrate having a first region and second regions; transistors on the substrate in the first region and the second regions; first electrodes each connected to the transistors; an organic emission layer on the first electrodes; and second electrodes on the organic emission layer, molecular weights of organic materials of the organic emission layer in the first region and the organic emission layer in the second regions being different from each other.
1. A display device, comprising:
a substrate having a bending region and non-bending regions;
first electrodes;
an organic emission layer on the first electrodes; and
second electrodes on the organic emission layer,
wherein a molecular weight of organic materials of the organic emission layer positioned in the bending region of the substrate is higher than those of organic materials of the organic emission layer positioned in the non-bending regions of the substrate,
wherein the organic materials of the organic emission layer positioned in the bending region of the substrate comprise at least one of a polyfluorene derivative, a (poly)paraphenylenevinylene derivative, a polyphenylene derivative, polyvinylcarbazole, a polythiophene derivative, poly (3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), polyanilin (PANI), polypyrrole, or compounds obtained by doping polymer materials thereof with a perylene based pigment, a cumarine based pigment, a rhodamine based pigment, rubrene, perylene, 9,10-diphenylanthracene, tetraphenylbutadiene, Nile red, coumarin and quinacridone, and
wherein the organic materials of the organic emission layer positioned in the non-bending regions of the substrate comprises at least one of (4,4′-bis(carbazol-9-yl)biphenyl) (CBP), (9,10-Di(naphth-2-yl) anthracene) (ADN), 1,3,5-tris(N-phenylbenzimiazole-2-yl)benzene(TPBI), 2-tert-butyl-9,10-di (2-naphthyl)anthracene (TBADN), 1,3-bis(carbazol-9-yl)benzene (MCP), and 1,3,5-tris(carbazol-9-yl)benzene (TCP).
2. The display device as claimed in claim 1 , wherein the bending region is a region folded or bent based on a reference line.
3. The display device as claimed in claim 1 , wherein:
the non-bending regions include first and second non-bending regions, and
the first and second non-bending regions are at opposite sides of the bending region.
4. The display device as claimed in claim 1 , wherein:
an emission layer of the bending region is formed by a solution process, and
an emission layer of the non-bending regions is formed by a deposition process.
5. The display device as claimed in claim 1 , wherein the organic emission layer includes a hole-injection layer, a hole-transporting layer, an emission layer, an electron-transporting layer, and an electron-injection layer.
6. The display device as claimed in claim 5 , wherein the hole-injection layer, the hole-transporting layer, the electron-transporting layer, and the electron-injection layer are over an entirety of the substrate.
7. The display device as claimed in claim 1 , wherein, among the second electrodes, a second electrode in the bending region and a second electrode in the non-bending regions have different thicknesses.
8. The display device as claimed in claim 7 , wherein the second electrode in the bending region has a thinner thickness than a thickness of the second electrode in the non-bending regions.
9. A display device, comprising:
a substrate having a bending region and non-bending regions;
first electrodes;
an organic emission layer on the first electrodes; and
second electrodes on the organic emission layer,
wherein, among the second electrodes, a second electrode in the bending region has a thinner thickness than a thickness of a second electrode in the non-bending regions
wherein the organic materials of the organic emission layer positioned in the bending region of the substrate comprises at least one of a polyfluorene derivative, a (poly)paraphenylenevinylene derivative, a polyphenylene derivative, polyvinylcarbazole, a polythiophene derivative, poly (3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), polyanilin (PANI), polypyrrole, or compounds obtained by doping polymer materials thereof with a perylene based pigment, a cumarine based pigment, a rhodamine based pigment, rubrene, perylene, 9,10-diphenylanthracene, tetraphenylbutadiene, Nile red, coumarin and quinacridone, and
wherein the organic materials of the organic emission layer positioned in the non-bending regions of the substrate comprises at least one of (4,4′-bis(carbazol-9-yl)biphenyl) (CBP), (9,10-Di(naphth-2-yl) anthracene) (ADN), 1,3,5-tris(N-phenylbenzimiazole-2-yl)benzene(TPBI), 2-tert-butyl-9,10-di (2-naphthyl)anthracene (TBADN), 1,3-bis(carbazol-9-yl)benzene (MCP), and 1,3,5-tris(carbazol-9-yObenzene (TCP).
10. The display device as claimed in claim 9 , wherein the bending region is a region folded or bent based on a reference line.
11. The display device as claimed in claim 10 , wherein:
the non-bending regions include first and second non-bending regions, and
the first and second non-bending regions are at opposite sides of the bending region.