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US 10,381,522 B2Granted
Light emitting diode
AssigneeSamsung Display Co., Ltd.
InventorsSang Hyun Han, Jong Woo Kim, Young Kook Kim, Seok Hwan Hwang
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Abstract
A light emitting diode is presented, including: a first electrode; a second electrode overlapping the first electrode; an emission layer interposed between the first electrode and the second electrode; and a light efficiency improving layer positioned on at least one of the first electrode and the second electrode, wherein at least one of the first electrode and the second electrode may include one surface facing the emission layer and the other surface opposing the one surface and including the other surface on which the light efficiency improving layer is positioned.
Claims19
A light emitting diode comprising:
- a first electrode;
- a second electrode overlapping the first electrode;
- an emission layer interposed between the first electrode and the second electrode;
- and
- a light efficiency improving layer positioned on at least one of the first electrode and the second electrode,
- wherein at least one of the first electrode and the second electrode includes:
- one surface facing the emission layer and
- the other surface opposing the one surface and including the other surface on which the light efficiency improving layer is positioned, and
- wherein the light efficiency improving layer has a structure of Chemical Formula 1 below,
- wherein X has a structure of C1-Z—C2 in which C1 and C2 are each independently selected from benzene, naphthalene, and anthracene;
- Z is one of CH2, CHR (in which R is a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms), CR1R2 (in which each of R1 and R2 is an independently substituted or unsubstituted alkyl group having 1 to 5 carbon atoms), O, and S;
- C1-Z—C2 consists of one condensed ring having 4 or 5 carbon atoms but excluding a 6-membered heteroatomic ring wherein the heteroatom is O or S;
- L1 is a substituted or unsubstituted arylene group having 5 to 8 carbon atoms, or a substituted or unsubstituted heteroarylene group having 4 to 8 carbon atoms as a single bond and a divalent linking group;
- and
- Ar1 to Ar4 each independently represent a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a substituted or unsubstituted condensed polycyclic group having 6 to 30 carbon atoms:
12 more elements
A light emitting diode comprising:
- a first electrode;
- a second electrode overlapping the first electrode;
- an emission layer interposed between the first electrode and the second electrode;
- and
- a light efficiency improving layer positioned on at least one of the first electrode and the second electrode,
- wherein at least one of the first electrode and the second electrode includes:
- one surface facing the emission layer and
- the other surface opposing the one surface and including the other surface on which the light efficiency improving layer is positioned, and
- wherein the light efficiency improving layer includes one of Compound A17 to Compound A18:
6 more elements
A light emitting diode comprising:
- a first electrode;
- a second electrode overlapping the first electrode;
- an emission layer interposed between the first electrode and the second electrode;
- and
- a light efficiency improving layer positioned on at least one of the first electrode and the second electrode,
- wherein at least one of the first electrode and the second electrode includes:
- one surface facing the emission layer and
- the other surface opposing the one surface and including the other surface on which the light efficiency improving layer is positioned, and
- wherein the light efficiency improving layer has a structure of Chemical Formula 1 below:
- L1 is a substituted or unsubstituted arylene group having 5 to 8 carbon atoms, or a substituted or unsubstituted heteroarylene group having 4 to 8 carbon atoms as a single bond and a divalent linking group;
- Ar1 to Ar4 each independently represent a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a substituted or unsubstituted condensed polycyclic group having 6 to 30 carbon atoms:
- [Chemical Formula 1]
- ;
- and
- wherein X has a structure of Chemical Formula 6, and wherein * indicates a site that is bound to a neighboring atom:
12 more elements
Dependencies are inferred from the claim text.