Display panel
A display panel including an anode layer, a functional layer, a cathode layer, and a packaging layer is provided, in which the functional layer includes a hole transport layer, a light-emitting layer, a reflective layer, and an electron transport layer. The display panel has an advantage in increasing light transmittance.
1. A display panel, comprising:
an anode layer;
a functional layer disposed at a surface of a side of the anode layer;
a cathode layer disposed at a surface of a side of the functional layer away from the anode layer; and
a packaging layer disposed at a surface of a side of the cathode layer away from the functional layer;
wherein the functional layer comprises:
a hole transport layer disposed at the surface of the side of the anode layer;
a light-emitting layer disposed at a surface of a side of the hole transport layer away from the anode layer;
a reflective layer disposed at a surface of a side of the light-emitting layer away from the hole transport layer; and
an electron transport layer disposed at a surface of a side of the reflective layer away from the light-emitting layer;
wherein the light-emitting layer comprises: a first light-emitting layer disposed at the surface of the side of the hole transport layer away from the anode layer; a second light-emitting layer disposed at the surface of the side of the hole transport layer away from the anode layer; and a third light-emitting layer disposed at the surface of the side of the hole transport layer away from the anode layer; and
wherein the reflective layer comprises: a first reflective layer disposed at a surface of a side of the first light-emitting layer away from the hole transport layer; a second reflective layer disposed at a surface of a side of the second light-emitting layer away from the hole transport layer; and a third reflective layer disposed at a surface of a side of the third light-emitting layer away from the hole transport layer.
2. The display panel according to claim 1 , wherein a thickness of the first light-emitting layer is less than a thickness of the second light-emitting layer, and the thickness of the second light-emitting layer is less than a thickness of the third light-emitting layer.
3. The display panel according to claim 1 , wherein the first reflective layer, the second reflective layer, and the third reflective layer have a same thickness.
4. The display panel according to claim 1 , wherein the functional layer further comprises:
a hole injection layer disposed between the anode layer and the hole transport layer;
an electron blocking layer disposed between the hole transport layer and the light-emitting layer;
a light extraction layer disposed at the surface of the side the reflective layer away from the light-emitting layer;
a hole blocking layer disposed at a surface of a side of the light extraction layer away from the reflective layer; and
an electron injection layer disposed at a surface of a side of the electron transport layer away from the hole blocking layer.
5. The display panel according to claim 4 , wherein the electron blocking layer comprises:
a first electron blocking layer disposed between the hole transport layer and the first light-emitting layer;
a second electron blocking layer disposed between the hole transport layer and the second light-emitting layer; and
a third electron blocking layer disposed between the hole transport layer and the third light-emitting layer.
6. The display panel according to claim 5 , wherein the first electron blocking layer, the second electron blocking layer, and the third electron blocking layer have a same thickness.
7. The display panel according to claim 4 , further comprising a pixel definition layer disposed between the anode layer and the functional layer, wherein the pixel definition layer has at least three through holes.
8. The display panel according to claim 7 , wherein the electron blocking layer, the light-emitting layer, and the reflective layer are disposed in the through holes.