Patent ID: 11925043
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 16:
17. A quantum dot light-emitting device comprising
a first electrode and a second electrode,
a quantum dot layer between the first electrode and the second electrode,
a first electron transport layer and a second electron transport layer disposed between the quantum dot layer and the second electrode, wherein the second electron transport layer is disposed between the quantum dot layer and the first electron transport layer, and each of the first electron transport layer and the second electron transport layer comprise an inorganic material,
wherein a lowest unoccupied molecular orbital energy level of the second electron transport layer is shallower than a lowest unoccupied molecular orbital energy level of the first electron transport layer, and a lowest unoccupied molecular orbital energy level of the quantum dot layer is shallower than a lowest unoccupied molecular orbital energy level of the second electron transport layer,
wherein the second electron transport layer comprises cerium oxide nanoparticles and a cesium, and the cesium is included in an amount of about 0.01 atomic percent to about 40 atomic percent based on a total number of atoms of cerium and cesium in the second electron transport layer.