Organic light-emitting display panel and display device
Provided are an organic light-emitting display panel and a display device, for improving the light extraction efficiency of OLED display panel. The organic light-emitting display panel includes an array substrate having a plurality of driving elements, and a plurality of organic light-emitting components. Each light-emitting component includes an anode, a cathode and an organic functional layer arranged between the anode and the cathode. The organic functional layer includes a hole transmission region, a light-emitting layer, and an electron transmission region stacked in a sequence from the anode to the cathode. With respect to visible light having a certain wavelength, a refractive index of the light-emitting layer is less than a refractive index of the electron transmission region, and the refractive index of the light-emitting layer is less than a refractive index of the hole transmission region. The above organic light-emitting display panel is applicable to the display device.
1. An organic light-emitting display panel, comprising:
an array substrate, the array substrate comprising a plurality of driving elements; and
a plurality of organic light-emitting components corresponding to the plurality of driving elements,
wherein each of the plurality of light-emitting components comprises an anode, a cathode and an organic functional layer arranged between the anode and the cathode,
wherein the organic functional layer comprises a hole transmission region, a light-emitting layer, and an electron transmission region stacked in a sequence from the anode to the cathode, wherein the hole transmission region directly contacts the light-emitting layer,
wherein with respect to visible light having a wavelength, a refractive index of the light-emitting layer is less than a refractive index of the electron transmission region, and the refractive index of the light-emitting layer is less than a refractive index of each part of the hole transmission region,
wherein the electron transmission region comprises a first electron transmission layer and a second electron transmission layer, the second electron transmission layer and the first electron transmission layer being stacked in a sequence from the light-emitting layer to the cathode, and the hole transmission region comprises a first hole transmission layer and a second hole transmission layer stacked in a sequence from the anode to the light-emitting layer, and
wherein with respect to the visible light having a wavelength of 460 nm, the refractive index of the light-emitting layer is n1, a refractive index of the first electron transmission layer is n21, and a refractive index of the second electron transmission layer is n22, a refractive index of the first hole transmission layer is n31, and a refractive index of the second hole transmission layer is n32, where n21−n22>0.1, n22−n1>0.1, n31−n32>0.1 and n32−n1>0.1.
2. The organic light-emitting display panel according to claim 1 , wherein with respect to the visible light having the wavelength of 460 nm, the refractive index of the hole transmission region is n3, where n3−n1>0.1.
3. The organic light-emitting display panel according to claim 2 , wherein 1.45<n1<1.6.
4. The organic light-emitting display panel according to claim 2 , wherein 1.6<n3<1.9.
5. The organic light-emitting display panel according to claim 2 , wherein 1.8<n3<1.9.
6. The organic light-emitting display panel according to claim 1 , wherein 1.8<n21<1.9 and 1.6<n22<1.8.
7. The organic light-emitting display panel according to claim 1 , wherein the hole transmission region comprises a first hole transmission layer and a second hole transmission layer stacked in a sequence from the anode to the light-emitting layer; and
with respect to the visible light, a refractive index of the first hole transmission layer is greater than or equal to a refractive index of the second hole transmission layer.
8. The organic light-emitting display panel according to claim 1 , wherein 1.8<n31<1.9 and 1.6<n32<1.8.
9. The organic light-emitting display panel according to claim 1 , wherein a host material of the light-emitting layer of each of the plurality of organic light-emitting components comprises a fluorine-containing group.
10. The organic light-emitting display panel according to claim 1 , wherein the organic light-emitting display panel further comprises a capping layer disposed on a side of the cathode facing away from the anode, and the capping layer has a refractive index greater than a refractive index of the cathode.
11. An organic light-emitting display device, comprising the organic light-emitting display panel according to claim 1 .
12. An organic light-emitting display panel, comprising:
an array substrate, the array substrate comprising a plurality of driving elements; and
a plurality of organic light-emitting components corresponding to the plurality of driving elements, wherein the plurality of organic light-emitting components comprises a red organic light-emitting component configured to emit red light, a green organic light-emitting component configured to emit green light, and a blue organic light-emitting component configured to emit blue light,
wherein each of the plurality of light-emitting components comprises an anode, a cathode and an organic functional layer arranged between the anode and the cathode,
wherein the organic functional layer comprises a hole transmission region, a light-emitting layer, and an electron transmission region stacked in a sequence from the anode to the cathode, wherein the hole transmission region directly contacts the light-emitting layer,
wherein with respect to visible light having a wavelength, a refractive index of the light-emitting layer is less than a refractive index of the electron transmission region, and the refractive index of the light-emitting layer is less than a refractive index of each part of the hole transmission region, and
wherein in the array substrate, the refractive index of the light-emitting layer of the red organic light-emitting component for emitting light with the wavelength of 620 nm is equal to or less than the refractive index of the light-emitting layer of the blue organic light-emitting component for emitting light with the wavelength of 460 nm, so as to improve a color shift of viewing angle.