Organic light-emitting diode (OLED) display panel, electronic device and manufacturing method
The present disclosure provides an OLED display panel, an electronic device, and a manufacturing method. The OLED display panel comprises a substrate, a first electrode, a light-emitting function layer, and a second electrode including Ag or a metal alloy containing Ag. When the second electrode is made of the metal alloy containing Ag, a content of Ag in the second electrode is more than a sum of contents of all other elements in the second electrode.
1. An OLED display panel, comprising:
a substrate;
a first electrode;
a light-emitting function layer;
a second electrode including Ag or a metal alloy containing Ag; and
a light coupling organic layer disposed on a side of the second electrode facing away from the substrate,
wherein when the second electrode is made of the metal alloy containing Ag, a content of Ag in the second electrode is more than a sum of contents of all other elements in the second electrode,
the first electrode has light reflectance greater than 80%,
the light coupling organic layer has a refractive index greater than the second electrode, and
total transmittance of the second electrode and the light coupling organic layer is greater than about 60%.
2. The OLED display panel according to claim 1 , wherein the first electrode includes:
a first transparent conductive film, a reflective conductive film, and a second conductive film sequentially disposed.
3. The OLED display panel according to claim 2 , wherein:
at least one of the first transparent conductive film and the second conductive film is made of indium tin oxide (ITO); and
the reflective conductive film is made of Ag to increase light reflectance of the first electrode.
4. The OLED display panel according to claim 2 , wherein:
the reflective conductive film has a thickness greater than about 500 Å.
5. The OLED display panel according to claim 1 , wherein:
the second electrode has a thickness ranging approximately between 120 Å and 250 Å.
6. The OLED display panel according to claim 5 , wherein:
the second electrode has a thickness ranging approximately between 200 Å and 250 Å.
7. The OLED display panel according to claim 1 , wherein:
the second electrode is made of the metal alloy containing Ag; and
the content of Ag in the second electrode is greater than about 80%.
8. The OLED display panel according to claim 1 , wherein:
the second electrode has light transmittance greater than about 20%.
9. The OLED display panel according to claim 1 , wherein:
when the second electrode is made of the metal alloy containing Ag, the metal alloy containing Ag also includes at least one of a Mg element, a Yb element, an alkali metal element, an alkaline metal element, and a rare earth element.
10. The OLED display panel according to claim 1 , further including:
a plurality of light-emitting units,
wherein the first electrodes corresponding to a light-emitting unit are electrically insulated from each other;
each light-emitting unit corresponds to a thin-film transistor; and
the thin-film transistor and the corresponding first electrode are electrically connected.
11. The OLED display panel according to claim 1 , further including:
a plurality of light-emitting units,
wherein the light-emitting units in a same row share a same first electrode,
the light-emitting units in a same column share a same second electrode, and
the first electrodes and the second electrodes intersect with each other and are electrically insulated from each other.
12. The OLED display panel according to claim 1 , further including:
a plurality of light-emitting units,
wherein a micro-cavity structure is formed between the first electrode and the second electrode in a light-emitting unit,
micro-cavity structures corresponding to the light-emitting units emitting light in different colors have different effective cavity lengths, and
the effective cavity length of the micro-cavity structure refers to an optical path length in the micro-cavity structure.
13. The OLED display panel according to claim 1 , wherein the light-emitting function layer further includes:
a first auxiliary function layer, a light-emitting layer, and a second auxiliary function layer.
14. The OLED display panel according to claim 13 , further including:
a plurality of light-emitting units,
wherein the light-emitting layer corresponding to a red light-emitting unit emitting red light and the light-emitting layer corresponding to a green light-emitting unit emitting green light are made of a phosphorescent material, and
the light-emitting layer corresponding to a blue light-emitting unit emitting blue light is made of a fluorescent material.
15. The OLED display panel according to claim 14 , further including:
a plurality of light-emitting units,
wherein at least one of the light-emitting layer corresponding to a red light-emitting unit emitting red light and the light-emitting layer corresponding to a blue light-emitting unit emitting blue light is made of one or two host materials, and
the light-emitting layer corresponding to a green light-emitting unit emitting green light is made of at least two host materials.
16. An electronic device, comprising an OLED display panel, wherein the OLED display panel comprises:
a substrate;
a first electrode;
a light-emitting function layer;
a second electrode including Ag or a metal alloy containing Ag; and
a light coupling organic layer disposed on a side of the second electrode facing away from the substrate,
wherein when the second electrode is made of the metal alloy containing Ag, a content of Ag in the second electrode is more than a sum of contents of all other elements in the second electrode,
the first electrode has light reflectance greater than 80%,
the light coupling organic layer has a refractive index greater than the second electrode, and
total transmittance of the second electrode and the light coupling organic layer is greater than about 60%.
17. A manufacturing method for an OLED display panel, comprising:
sequentially forming a first electrode, a light-emitting function layer, a second electrode including Ag or a metal alloy containing Ag on a substrate, and a light coupling organic layer disposed on a side of the second electrode facing away from the substrate,
wherein when the second electrode is made of the metal alloy containing Ag, a content of Ag in the second electrode is more than a sum of contents of all other elements in the second electrode,
the first electrode has light reflectance greater than 80%,
the light coupling organic layer has a refractive index greater than the second electrode, and
total transmittance of the second electrode and the light coupling organic layer is greater than about 60%.
18. The manufacturing method for the OLED display panel according to claim 17 , wherein:
the second electrode is formed by a vapor deposition of Ag; or
the second electrode is formed by a vapor deposition of a mixture of Ag and other metals.
19. The manufacturing method for the OLED display panel according to claim 17 , wherein:
the second electrode is formed by ink-jet printing.