Patent ID: 11925047
Assignee: LG DISPLAY CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 10:
11. A display device comprising:
a plurality of subpixels;
a thin film transistor provided for each subpixel; and
one or more blue stacks connected to the thin film transistor at each subpixel, each of the blue stacks comprising a hole transport layer, an electron blocking layer, a first emissive layer, a second emissive layer, and an electron transport layer, which are sequentially disposed between a first electrode and a second electrode, the first electrode and the second electrode being opposite each other, wherein
the first emissive layer comprises a first host and a first blue dopant,
the second emissive layer comprises a second host and a second blue dopant,
a triplet energy level of the first host is greater than a triplet energy level of the second host, and
a triplet energy level of the first blue dopant is greater than the triplet energy level of the first host,
a singlet energy level of the first host is greater than a singlet energy level of the second host, and
the singlet energy level of the second host is greater than a singlet energy level of the first blue dopant.