Display panel having auxiliary electrode, display device including the same, and method of manufacturing display panel
A display panel includes: a base substrate having a base surface parallel to a plane defined by a first direction and a second direction; a circuit layer on the base substrate; a first electrode in a first region on the circuit layer; an auxiliary electrode in a second region on the circuit layer and spaced apart from the first electrode; an organic layer on the first electrode and the auxiliary electrode and including a plurality of openings overlapping the auxiliary electrode, and a second electrode on the organic layer, wherein: the second electrode is electrically connected to the auxiliary electrode via each of the plurality of openings; at least a portion of the organic layer includes a plurality of protrusions having a shape surrounding each of the plurality of openings.
1 . A display panel comprising:
a base substrate having a base surface parallel to a plane defined by a first direction and a second direction crossing the first direction;
a circuit layer on the base substrate;
a first electrode in a first region on the circuit layer;
an auxiliary electrode in a second region on the circuit layer and spaced apart from the first electrode;
an organic layer on the first electrode and the auxiliary electrode and including a plurality of openings overlapping the auxiliary electrode, the organic layer including at least one emission layer; and
a second electrode on the organic layer,
wherein:
the second electrode is electrically connected to the auxiliary electrode via each of the plurality of openings;
at least a portion of the organic layer includes a plurality of protrusions having a shape surrounding each of the plurality of openings; and
a width of each of the plurality of protrusions in the first direction is 7 μm or more in a plan view.
2 . The display panel of claim 1 , wherein a width of each of the plurality of openings in the first direction is 0.6 times to 0.8 times more than the width of each of the plurality of protrusions in the first direction.
3 . The display panel of claim 1 , wherein a sheet resistance of the second electrode is 30Ω/□ or less.
4 . The display panel of claim 1 , wherein a thickness of the second electrode is 50 Å or more.
5 . The display panel of claim 1 , wherein the organic layer comprises 200 thousand to one million of the plurality of openings.
6 . The display panel of claim 1 , wherein the organic layer comprises:
a first stack on the first electrode and including a first opening overlapping the auxiliary electrode;
a charge generation layer on the first stack and including a second opening overlapping the first opening; and
a second stack on the charge generation layer and including a third opening overlapping the first opening and the second opening.
7 . The display panel of claim 6 , wherein:
the first stack includes a first emission layer overlapping the first electrode;
the second stack includes a second emission layer overlapping the first electrode; and
the first emission layer is configured to emit light having different color from the second emission layer.
8 . The display panel of claim 1 , further comprising:
a capping layer on the second electrode; and
an encapsulation layer on the capping layer, wherein the encapsulation layer includes a plurality of inorganic films and at least one organic film between the plurality of inorganic films.
9 . The display panel of claim 1 , wherein the auxiliary electrode has a circular shape or a rectangular shape in the plan view.
10 . The display panel of claim 1 , wherein the width of the auxiliary electrode in the first direction is 7 μm to 60 μm.
11 . The display panel of claim 1 , wherein the base substrate is divided into a first light emitting region configured to emit light in a first wavelength region, a second light emitting region configured to emit light in a second wavelength region, a third light emitting region configured to emit light in a third wavelength region different from the first wavelength region and the second wavelength region, and a non-light emitting region surrounding each of the first to third light emitting regions, and
the auxiliary electrode is in the non-light emitting region.
12 . The display panel of claim 11 , wherein:
each of the first light emitting region, the second light emitting region, and the third light emitting region is provided in plurality; and
the auxiliary electrode is between the plurality of first light emitting regions.
13 . The display panel of claim 12 , wherein a distance between two first light emitting regions adjacent along the first direction among the plurality of first light emitting regions is defined as a first distance, and a width of the auxiliary electrode in the first direction is 4% to 20% of the first distance.
14 . The display panel of claim 1 , wherein the organic layer comprises:
an opening region overlapping the plurality of openings;
an intermediate region surrounding the plurality of openings; and
a protruding region which surrounds the intermediate region and in which the protrusion is located,
wherein a slope of the organic layer in the intermediate region is smaller than that of the organic layer in the protruding region.
15 . A display device comprises:
a display panel including an emission layer configured to emit a source light, and
a light control member on the display panel and including a plurality of light control patterns configured to transmit the source light or to convert a wavelength of the source light,
wherein the display panel includes:
a base substrate configured to provide a base surface parallel to a plane defined by a first direction and a second direction crossing the first direction;
a circuit layer on the base substrate;
a first electrode in a first region on the circuit layer;
an auxiliary electrode in a second region on the circuit layer and spaced apart from the first electrode;
an organic layer on the first electrode and the auxiliary electrode and including a plurality of openings overlapping the auxiliary electrode, the organic layer including at least one emission layer; and
a second electrode on the organic layer,
wherein:
the second electrode is electrically connected to the auxiliary electrode via each of the plurality of openings;
at least a portion of the organic layer includes a plurality of protrusions having a shape surrounding each of the plurality of openings; and
a width of each of the plurality of protrusions in the first direction is 7 μm or more in a plan view.
16 . The display device of claim 15 , wherein at least one among the plurality of light control patterns includes a quantum dot.
17 . The display device of claim 15 , wherein the light control member further includes a light shielding pattern between each of the plurality of light control patterns.
18 . A method of manufacturing a display panel, the method comprises:
providing a target substrate including a base substrate configured to provide a base surface parallel to a plane defined by a first direction and a second direction crossing the first direction, a pixel electrode on the base substrate, and an auxiliary electrode on a same layer as the pixel electrode;
forming an organic layer including an emission layer on the pixel electrode and the auxiliary electrode;
forming, by emitting a laser, an opening that passes through the organic layer on the auxiliary electrode, and a protrusion adjacent to the opening; and
forming a counter electrode on the organic layer,
wherein the counter electrode is electrically connected to the auxiliary electrode via the opening, and
a width of the protrusion in the first direction is 7 μm or more in a plan view.
19 . The method of claim 18 , wherein the protrusion is formed by the laser at the same time in the forming of the opening, and surrounds the opening in the plan view.
20 . The method of claim 18 , wherein, in the forming of the opening and the protrusion, an intermediate portion is between the opening and the protrusion, and a slope of the intermediate portion is smaller than that of the organic layer on which the protrusion is located.