Patent ID: 11943985
Assignee: LG DISPLAY CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 14:
15. A light-emitting device comprising:
an anode and a cathode opposite each other;
a charge generation layer between the anode and the cathode;
a first stack between the anode and the char generation layer,
the first stack comprising a first emissive layer having a first dopant and a first fluorescent dopant; and
a second stack between the charge generation layer and the cathode,
the second stack overlapping the first stack,
the second stack comprising a second emissive layer configured to emit a same color-based light as the first emissive layer,
the second emissive layer having a second host, a second fluorescent dopant, and a non-fluorescent dopant,
wherein the second emissive layer overlaps the first emissive layer on at least one subpixel,
wherein the non-fluorescent dopant in the second emissive layer has an emission peak of a longer wavelength by approximately 1 nm or more to approximately 30 nm or less than an emission peak of the first fluorescent dopant in the first emissive layer, and
wherein the second host has a photoluminescence (PL) spectrum that overlaps a PL spectrum of the second fluorescent dopant, and the second host has a higher triplet state than that of the non-fluorescent dopant.