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US 11,895,855 B2Granted
Light-emitting device
AssigneeSamsung Electronics Co., Ltd.
InventorYongChurl Kim
Life of this patent
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Abstract
A light-emitting device comprising: a first electrode, a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; and a first charge transport layer disposed between the first electrode and the emission layer, wherein a band gap energy of the emission layer and a band gap energy of the first charge transport layer are different from each other, the emission layer comprises a first perovskite compound, and the first charge transport layer consists of a second perovskite compound.
Claims19
A light-emitting device comprising:
- a first electrode;
- a second electrode facing the first electrode;
- an emission layer disposed between the first electrode and the second electrode;
- and
- a first charge transport layer disposed between the first electrode and the emission layer,
- a second charge transport layer disposed between the emission layer and the second electrode,
- wherein a band gap energy of the emission layer and a band gap energy of the first charge transport layer are different from each other,
- wherein the band gap energy of the emission layer and a band gap energy of the second charge transport layer are different from each other,
- the emission layer comprises a first perovskite compound, wherein the first perovskite compound and the second perovskite compound are different from each other;
- and
- the first charge transport layer comprises a second perovskite compound,
- wherein the band gap energy of the emission layer is less than the band gap energy of the first charge transport layer.
9 more elements
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.
8 more elements
Dependencies are inferred from the claim text.