ORGANIC ELECTROLUMINESCENCE DEVICE
First Claim
1. An organic electroluminescence device comprising an anode, an emitting layer, a blocking layer, an electron injecting layer, and a cathode in sequential order, whereinthe emitting layer comprises a host and a dopant,the blocking layer comprises an aromatic heterocyclic derivative,a triplet energy ETb (eV) of the aromatic heterocyclic derivative is larger than a triplet energy ETh (eV) of the host, andan affinity Ab (eV) of the blocking layer and an affinity A, (eV) of the electron injecting layer satisfy a relationship of Ae−
- Ab<
0.2.
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Abstract
An organic electroluminescence device includes an anode, an emitting layer, a blocking layer, an electron injecting layer, and a cathode in sequential order. The emitting layer includes a host and dopant. The blocking layer includes an aromatic heterocyclic derivative. A triplet energy ETb (eV) of the blocking layer is larger than a triplet energy ETh (eV) of the host. An affinity Ab (eV) of the blocking layer and an affinity Ab (eV) of the electron injecting layer satisfy a relationship of Ae−Ab<0.2.
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Citations
30 Claims
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1. An organic electroluminescence device comprising an anode, an emitting layer, a blocking layer, an electron injecting layer, and a cathode in sequential order, wherein
the emitting layer comprises a host and a dopant, the blocking layer comprises an aromatic heterocyclic derivative, a triplet energy ETb (eV) of the aromatic heterocyclic derivative is larger than a triplet energy ETh (eV) of the host, and an affinity Ab (eV) of the blocking layer and an affinity A, (eV) of the electron injecting layer satisfy a relationship of Ae−
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16. An organic electroluminescence device comprising an anode, an emitting layer, a blocking layer, an electron injecting layer, and a cathode in sequential order, wherein
the emitting layer comprises a host and a dopant, the blocking layer comprises an aromatic heterocyclic derivative, a triplet energy ETb (eV) of the aromatic heterocyclic derivative is larger than a triplet energy ETh (eV) of the host, and the aromatic heterocyclic derivative has an azine ring.
Specification