Patent ID: 11895855
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 17:
18. A light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode; and
n light-emitting units disposed between the first electrode and the second electrode,
wherein n is a natural number of 2 or greater,
an nth light-emitting unit among the n light-emitting units comprises an nth emission layer, an nth first charge transport layer, and nth second charge transport layer, wherein a band gap energy of the nth emission layer is different from a band gap energy of the nth first charge transport layer, and a band gap energy of the nth emission layer is different from a band gap energy of the nth second charge transport layer,
an n−1th light-emitting unit among the light-emitting units comprises an n−1th emission layer, an n−1th first charge transport layer, and an n−1th second charge transport layer, wherein a band gap energy of the n−1th emission layer is different from a band gap energy of the n−1th first charge transport layer, and a band gap energy of the n−1th emission layer is different from a band gap energy of the n−1th second charge transport layer,
the n−1th first charge transport layer is disposed between the nth emission layer and the n−1th emission layer,
the n−1th second charge transport layer is disposed between the nth emission layer and the n−1th emission layer,
each of the nth emission layer and the n−1th emission layer independently comprises a first perovskite compound, wherein the first perovskite compound and the second perovskite compound are different from each other, and
each of the nth first charge transport layer and the n−1th first charge transport layer independently consists of a second perovskite compound.