Organic light-emitting device
AssigneeCanon Kabushiki Kaisha
InventorsNaoki Yamada, Jun Kamatani, Tomona Yamaguchi, Akihito Saitoh
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Abstract
A light-emitting layer emits light having an emission spectrum having a primary peak in the range of wavelengths of 430 to 480 nm. The light-emitting layer contains a host compound and a dopant compound. The dopant compound has an electron affinity of 2.93 eV or more higher that is than the host compound. The dopant compound in the lowest excited triplet state has an energy of 1.95 eV or less that is lower than the host compound in the lowest excited triplet state. The dopant compound has a smaller band gap than the host compound. The dopant compound is a hydrocarbon compound.
Claims6
An organic light-emitting device comprising:
- a pair of electrodes including an anode and a cathode;
- and
- a light-emitting layer comprising a host compound and a dopant compound that is disposed between the pair of electrodes, the dopant compound being a hydrocarbon compound and emitting light that is emitted from the light-emitting device, the light exhibiting an emission spectrum having a primary emission peak having the highest intensity in the range of wavelengths of 430 to 480 nm, the dopant compound having an electron affinity of 2.93 eV or more that is higher than the host compound, the dopant compound in the lowest excited triplet state having an energy of 1.95 eV or less that is lower than the host compound in the lowest excited triplet state, and the dopant compound having a smaller band gap than the host compound.
Dependencies are inferred from the claim text.