US 11,910,630 B2
White light organic light-emitting diode (WOLED) devices and preparation methods thereof, WOLED display apparatuses
Qingyu Huang, Beijing (CN); Fudong Chen, Beijing (CN); Huajie Yan, Beijing (CN); Wenqi Liu, Beijing (CN); and Zhiqiang Jiao, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Jun. 27, 2021, as Appl. No. 17/359,603.
Claims priority of application No. 202010685201.5 (CN), filed on Jul. 16, 2020.
Prior Publication US 2022/0020944 A1, Jan. 20, 2022
Int. Cl. H10K 50/125 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 71/00 (2023.01)
CPC H10K 50/125 (2023.02) [H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 71/00 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A white light organic light-emitting diode (WOLED) device, comprising:
an anode;
a cathode, disposed opposite to the anode;
a red-fluorescence emitting layer, disposed on a side of the anode close to the cathode;
a green-fluorescence emitting layer, disposed on a side of the red-fluorescence emitting layer close to the cathode;
an interlayer, disposed on a side of the green-fluorescence emitting layer close to the cathode, wherein the interlayer comprises a first Host material and a first thermally activated delayed fluorescence (TADF) material; and
a blue-fluorescence emitting layer, disposed on a side of the interlayer close to the cathode; wherein
emission spectra of the WOLED device comprise a first peak which is a main peak, wherein a peak wavelength of the first peak is not greater than 485 nm;
the emission spectra of the WOLED device comprise a second peak in green-band, wherein a peak wavelength of the second peak is in a range of 510 nm˜525 nm;
the emission spectra of the WOLED device comprise a third peak and a fourth peak in red-band, wherein a peak wavelength of the third peak is in a range of 610 nm˜625 nm, and a peak wavelength of the fourth peak is in a range of 656 nm˜670 nm; and
magnitudes of the first peak, the second peak, the third peak and the fourth peak are descending.