DISPLAY PANEL AND DISPLAY DEVICE

1 . A display panel, comprising:

a plurality of light-emitting devices, wherein each of the plurality of the light-emitting devices comprises a red light-emitting device, a green light-emitting device and a blue light-emitting device; and

wherein the red light-emitting device comprises a red light-emitting layer, a peak wavelength of a red spectrum emitted by the red light-emitting device is λ 11 , and a peak wavelength of an intrinsic emission spectrum of a red light-emitting material in the red light-emitting layer is λ 12 ; the green light-emitting device comprises a green light-emitting layer, a peak wavelength of a green spectrum emitted by the green light-emitting device is λ 21 , and a peak wavelength of an intrinsic emission spectrum of a green light-emitting material in the green light-emitting layer is λ 22 ; and the blue light-emitting device comprises a blue light-emitting layer, a peak wavelength of a blue spectrum emitted by the blue light-emitting device is λ 31 , and a peak wavelength of an intrinsic emission spectrum of a blue light-emitting material in the blue light-emitting layer is λ 32 ;

wherein, −1 nm≤Δ 1 =λ 11 −λ 12 ≤5 nm;

2 nm≤Δ 2 =λ 21 −λ 22 ≤7 nm; and

−2 nm≤Δ 3 =λ 31 −λ 322 nm.

2 . The display panel of claim 1 , wherein

3 nm≤Δ 1 +Δ 2 ≤12 nm.

3 . The display panel of claim 1 , wherein

Δ 1 >0, Δ 2 >0, and Δ 3 ≥0.

4 . The display panel of claim 1 , wherein

Δ 1 ≥Δ 2 >Δ 3 .

5 . The display panel of claim 1 , wherein

Δ 3 =0.

6 . The display panel of claim 1 , wherein the each of the plurality of the light-emitting devices comprises an anode and a cathode, the red light-emitting layer, the green light-emitting layer and the blue light-emitting layer are disposed between the anode and the cathode, the anode is a total reflective anode, the cathode is a semi-transmissive cathode, and a microcavity is formed between the anode and the cathode.

7 . The display panel of claim 6 , wherein a microcavity of the red light-emitting device has a first cavity length D 1 , a microcavity of the green light-emitting device has a second cavity length D 2 , and a microcavity of the blue light-emitting device has a third cavity length D 3 , wherein

at least one of following three conditions is met:

D 1 >λ 12 /2,

D 2 >λ 22 /2; and

D 3 >λ 32 /2.

8 . The display panel of claim 7 , wherein

D 1 >λ 12 /2, D 2 >2λ 2 /2 and D 3 ≥λ 32 /2.

9 . The display panel of claim 7 , wherein D 1 , D 2 and D 3 meet:

240 nm≤D 1 ≤290 nm;

200 nm≤D 2 ≤230 nm; and

160 nm≤D 3 ≤190 nm.

10 . The display panel of claim 6 , wherein the each of the plurality of the light-emitting devices further comprises a cap layer, the cap layer is disposed on a side of the cathode of the light-emitting device facing away from the anode, and a refractive index of the cap layer to light having a wavelength ranging from 380 nm to 720 nm is greater than a refractive index of the cathode.

11 . The display panel of claim 10 , wherein a refractive index of the cap layer to light having a wavelength ranging from 600 nm to 720 nm is greater than a refractive index of the cap layer to light having a wavelength ranging from 500 nm to 580 nm, and/or

a refractive index of the cap layer to light having a wavelength ranging from 400 nm to 490 nm is greater than the refractive index of the cap layer to light having a wavelength ranging from 500 nm to 580 nm.

12 . A display panel, comprising:

a plurality of light-emitting devices, wherein each of the plurality of the light-emitting devices comprises a red light-emitting device, a green light-emitting device and a blue light-emitting device; and

wherein the red light-emitting device comprises a red light-emitting layer, a peak wavelength of a red spectrum emitted by the red light-emitting device is λ 11 , and a peak wavelength of an intrinsic emission spectrum of a red light-emitting material in the red light-emitting layer is λ 12 ;

the green light-emitting device comprises a green light-emitting layer, a peak wavelength of a green spectrum emitted by the green light-emitting device is λ 21 , and a peak wavelength of an intrinsic emission spectrum of a green light-emitting material in the green light-emitting layer is λ 22 ; and the blue light-emitting device comprises a blue light-emitting layer, a peak wavelength of a blue spectrum emitted by the blue light-emitting device is λ 31 , and a peak wavelength of an intrinsic emission spectrum of a blue light-emitting material in the blue light-emitting layer is λ 32 ;

wherein at least one of following three conditions is met:

Δ 1 =λ 11 −λ 12 , and Δ 1 >0;

Δ 2 =λ 21 −λ 22 , and Δ 2 >0; and

Δ 3 =λ 31 −λ 32 , and Δ 3 >0.

13 . The display panel of claim 12 , wherein

Δ 1 >0, Δ 2 >0, and Δ 3 ≥0.

14 . The display panel of claim 12 , wherein the each of the plurality of the light-emitting devices comprises an anode and a cathode, the red light-emitting layer, the green light-emitting layer and the blue light-emitting layer are disposed between the anode and the cathode, the anode is a total reflective anode, the cathode is a semi-transmissive cathode, and a microcavity is formed between the anode and the cathode.

15 . The display panel of claim 14 , wherein a microcavity of the red light-emitting device has a first cavity length D 1 , a microcavity of the green light-emitting device has a second cavity length D 2 , a the microcavity of the blue light-emitting device has a third cavity length D 3 , wherein at least one of following three conditions is met:

D 1 >λ 12 /2;

D 2 >λ 22 /2; and

D 3 >λ 32 /2.

16 . The display panel of claim 15 , wherein

D 1 >λ 12 /2, D 2 >λ 22 /2 and D 3 ≥λ 32 /2.

17 . The display panel of claim 14 , wherein the each of the plurality of the light-emitting devices further comprises a cap layer, the cap layer is disposed on a side of the cathode of the light-emitting device facing away from the anode, and a refractive index of the cap layer to light having a wavelength ranging from 380 nm to 720 nm is greater than a refractive index of the cathode.

18 . A display device, comprising a display panel, wherein the display panel comprises:

a plurality of light-emitting devices, wherein each of the plurality of the light-emitting devices comprises a red light-emitting device, a green light-emitting device and a blue light-emitting device; and

wherein the red light-emitting device comprises a red light-emitting layer, a peak wavelength of a red spectrum emitted by the red light-emitting device is λ 11 , and a peak wavelength of an intrinsic emission spectrum of a red light-emitting material in the red light-emitting layer is λ 12 ; the green light-emitting device comprises a green light-emitting layer, a peak wavelength of a green spectrum emitted by the green light-emitting device is λ 21 , and a peak wavelength of an intrinsic emission spectrum of a green light-emitting material in the green light-emitting layer is λ 22 ; and the blue light-emitting device comprises a blue light-emitting layer, a peak wavelength of a blue spectrum emitted by the blue light-emitting device is λ 31 , and a peak wavelength of an intrinsic emission spectrum of a blue light-emitting material in the blue light-emitting layer is λ 32 ;

wherein, −1 nm≤Δ 1 =λ 11 −λ 12 ≤5 nm;

2 nm≤Δ 2 =λ 21 −λ 22 ≤7 nm; and

−2 nm≤Δ 3 =λ 31 −λ 32 ≤2 nm.

19 . A display device, comprising the display panel of claim 12 .