CPC H10K 50/12 (2023.02) [H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); H10K 71/00 (2023.02); H10K 85/6572 (2023.02)] | 9 Claims |
1. A thin film electroluminescent device, comprising:
a first electrode;
a functional structural layer disposed on the first electrode;
a second electrode disposed on the functional structural layer; and
a cover layer disposed on a side of the second electrode away from the first electrode, wherein the cover layer comprises an ionic compound having a chemical formula of AX2, wherein A is selected from a divalent metal, and X is selected from halogen;
wherein the light emitting layer comprises a host material and a dopant material, the host material has the following structural formula:
the doping material has the following structural formula:
and
a mass ratio of the host material to the dopant material is 7:1: −9:1.
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