Organic light-emitting display panel and display device
An organic light-emitting display panel and a display device are provided. The display panel includes a plurality of organic light-emitting components, wherein each of the plurality of organic light-emitting components comprises a first electrode, a light-emitting layer and a second electrode that are arranged by stacking, the first electrode has a reflectivity of R 1 , and the second electrode has a reflectivity of R 2 , R 1 and R 2 satisfy: { I 1 = F ( R 1 , R 2 , λ , X 1 , L ) × I 0 I 2 = F ′ ( R 1 , R 2 , λ , X 2 , L ) × I 0 I 1 I 0 - I 2 I 0 < 0.13 , wherein I 1 is a light intensity at a side of the first electrode, I 2 is a light intensity at a side of the second electrode, I 0 is an intrinsic light intensity of the light-emitting layer, λ is a wavelength of light emitted by the light-emitting layer, X 1 is a distance between an exciton recombination center in the light-emitting layer and the first electrode, and L is a length of a microcavity between the first electrode and the second electrode, wherein X 1 +X 2 =L.
1. An organic light-emitting display panel, comprising a plurality of organic light-emitting components, wherein each of the plurality of organic light-emitting components comprises a stack of a first electrode, a light-emitting layer and a second electrode, the first electrode has a reflectivity of R 1 , the second electrode has a reflectivity of R 2 , and for a same one of the plurality of organic light-emitting components, R 1 and R 2 satisfy:
{
I
1
=
F
(
R
1
,
R
2
,
λ
,
X
1
,
L
)
×
I
0
I
2
=
F
′
(
R
1
,
R
2
,
λ
,
X
1
,
L
)
×
I
0
I
1
I
0
-
I
2
I
0
<
0.13
,
wherein I 1 is a light intensity at a side of the first electrode, I 2 is a light intensity at a side of the second electrode, I 0 is an intrinsic light intensity of the light-emitting layer, F (R 1 , R 2 , λ, X 1 , L) is a first function associated with R 1 , R 2 , 2 , X 1 and L, F′ (R 1 , R 2 , λ, X 2 , L) is a second function associated with R 1 , R 2 , 2 , X 2 and L, λ is a wavelength of light emitted by the light-emitting layer, X 1 is a distance between an exciton recombination center in the light-emitting layer and the first electrode, X 2 is a distance between the exciton recombination center in the light-emitting layer and the second electrode, and L is a length of a microcavity between the first electrode and the second electrode, wherein X 1 +X 2 =L, 5%≤R 1 ≤95%, and 5%≤R 2 ≤95%.
2. The organic light-emitting display panel according to claim 1 , wherein
F
(
R
1
,
R
2
,
λ
,
X
1
,
L
)
=
(
1
-
R
2
)
[
1
+
R
1
+
2
R
1
×
cos
(
4
π
×
X
1
λ
)
]
1
+
R
1
×
R
2
-
2
R
1
×
R
2
×
cos
(
4
π
×
L
λ
)
,
and
F
(
R
1
,
R
2
,
λ
,
X
2
,
L
)
=
(
1
-
R
1
)
[
1
+
R
2
+
2
R
2
×
cos
(
4
π
×
X
2
λ
)
]
1
+
R
2
×
R
1
-
2
R
2
×
R
1
×
cos
(
4
π
×
L
λ
)
.
3. The organic light-emitting display panel according to claim 2 , wherein
3.5
≤
I
1
I
0
≤
4.5
,
and
3.5
≤
I
2
I
0
≤
4.5
.
4. The organic light-emitting display panel according to claim 3 , wherein
the plurality of organic light-emitting components at least comprise a blue organic light-emitting component, and the light-emitting layer of the blue organic light-emitting component comprises a blue light-emitting material; and
in the blue organic light-emitting component,
4.0
≤
I
1
I
0
≤
4.5
,
and
4.0
≤
I
2
I
0
≤
4.5
.
5. The organic light-emitting display panel according to claim 4 , wherein
in the blue organic light-emitting component,
I
1
I
0
-
I
2
I
0
<
0.01
.
6. The organic light-emitting display panel according to claim 3 , wherein
the plurality of organic light-emitting components at least comprise a green organic light-emitting component, and the light-emitting layer of the green organic light-emitting component comprises a green light-emitting material; and
in the green organic light-emitting component,
3.5
≤
I
1
I
0
≤
5.5
,
and
3.5
≤
I
2
I
0
≤
5.5
.
7. The organic light-emitting display panel according to claim 6 , wherein
in the green organic light-emitting component,
I
1
I
0
-
I
2
I
0
<
0.05
.
8. The organic light-emitting display panel according to claim 3 , wherein
the plurality of organic light-emitting components at least comprise a red organic light-emitting component, and the light-emitting layer of the red organic light-emitting component comprises a red light-emitting material; and
in the red organic light-emitting component,
4.5
≤
I
1
I
0
≤
5.5
,
and
4.5
≤
I
2
I
0
≤
5.5
.
9. The organic light-emitting display panel according to claim 8 , wherein
in the red organic light-emitting component,
I
1
I
0
-
I
2
I
0
<
0.13
.
10. The organic light-emitting display panel according to claim 3 , wherein
each of the plurality of organic light-emitting components further comprises a hole injection layer, a hole transmission layer, an electron transmission layer, and an electron injection layer, and
the plurality of organic light-emitting components comprises organic light-emitting components with different colors, and hole transmission layers in the organic light-emitting components with different colors have different thicknesses.
11. The organic light-emitting display panel according to claim 3 , wherein
the plurality of organic light-emitting components comprise organic light-emitting components with different colors, first electrodes in the organic light-emitting components with different colors have same reflectivity, and second electrodes in the organic light-emitting components with different colors have same reflectivity.
12. The organic light-emitting display panel according to claim 3 , wherein
40%≤R 1 ≤55%, and 48%≤R 2 ≤52%.
13. The organic light-emitting display panel according to claim 12 , wherein
the plurality of organic light-emitting components at least comprise a blue organic light-emitting component, and the light-emitting layer of the blue organic light-emitting component comprises a blue light-emitting material;
in the blue organic light-emitting component, a distance between an exciton recombination center in the light-emitting layer and the first electrode is X 1 b , wherein 220 nm≤X 1 b ≤240 nm; and
a microcavity of the blue organic light-emitting component has a length of Lb, wherein 910 nm≤Lb≤940 nm.
14. The organic light-emitting display panel according to claim 12 , wherein
the plurality of organic light-emitting components at least comprise a green organic light-emitting component, and the light-emitting layer of the green organic light-emitting component comprises a green light-emitting material;
in the green organic light-emitting component, a distance between an exciton recombination center in the light-emitting layer and the first electrode is X 1 g , wherein 510 nm≤X 1 g ≤535 nm; and
a microcavity of the green organic light-emitting component has a length of Lg, wherein 780 nm≤Lg≤820 nm.
15. The organic light-emitting display panel according to claim 12 , wherein
the plurality of organic light-emitting components at least comprise a red organic light-emitting component, and the light-emitting layer of the red organic light-emitting component comprises a red light-emitting material;
in the red organic light-emitting component, a distance between an exciton recombination center in the light-emitting layer and the first electrode is X 1 r , wherein 620 nm≤X 1 r≤ 660 nm; and
a microcavity of the red organic light-emitting component has a length of Lr, wherein 930 nm≤Lr≤970 nm.
16. The organic light-emitting display panel according to claim 1 , wherein
at least one of the first electrode and the second electrode is selected from a group consisting of an Ag material layer, a Mg—Ag material layer, and an ITO/Ag/ITO material layer.
17. A display device comprising the organic light-emitting display panel according to claim 1 .