The persistent luminescence emitter according to claim 14, which comprises the hole trap material in an amount of at most 10 mol % based on the total amount by mole of the electron donor molecule, the electron acceptor molecule and the hole trap material.ġ7. The persistent luminescence emitter according to claim 14, wherein the hole trap material has a higher HOMO level than the electron donor molecule.ġ6. The persistent luminescence emitter according to claim 1, which further comprises a hole trap material.ġ5. The persistent luminescence emitter according to claim 12, wherein the luminescent material exhibits the persistent luminescence.ġ4. The persistent luminescence emitter according to claim 1, which further comprises a luminescent material.ġ3. The persistent luminescence emitter according to claim 1, wherein a charge-transfer excited state formed between the electron donor molecule and the electron acceptor molecule exhibits the persistent luminescence.ġ2. The persistent luminescence emitter according to claim 1, wherein an electron donor molecule in an oxidized state and an electron acceptor molecule in a reduced state are generated by photo-irradiation of the persistent luminescence emitter, a hole of the electron donor molecule in an oxidized state and an electron of the electron acceptor molecule in a reduced state are recombined to generate a charge-transfer excited state between the electron donor molecule and the electron acceptor molecule.ġ1. The persistent luminescence emitter according to claim 1, wherein the electron acceptor molecule forms a neutral radical by the electron transfer.ġ0. The persistent luminescence emitter according to claim 1, which comprises the electron acceptor molecule in an amount of at most 10 mol % based on the total amount by mole of the electron donor molecule and the electron acceptor molecule.ĩ. The persistent luminescence emitter according to claim 6, wherein the electron acceptor molecule is an organic photoredox catalyst.Ĩ.

The persistent luminescence emitter according to claim 1, wherein the electron acceptor molecule is cationic.ħ. The persistent luminescence emitter according to claim 1, wherein the electron acceptor molecule has a lower HOMO level than the electron donor molecule.Ħ. The long persistent luminescence emitter according to claim 1, wherein after photo-irradiation of the persistent luminescence emitter stops, the emission intensity decay follows a power law.ĥ. The persistent luminescence emitter according to claim 1, wherein after photo-irradiation of the persistent luminescence emitter stops, emission intensity decays non-exponentially.Ĥ. The persistent luminescence emitter according to claim 1, wherein an electron transfer occurs from the electron donor molecule to the electron acceptor molecule by photo-irradiation of the persistent luminescence emitter.ģ. A persistent luminescence emitter emitting light for 0.1 seconds or longer after photo-irradiation of the persistent luminescence emitter stops, wherein: the persistent luminescence emitter comprises at least 70 mol % of an electron donor molecule and less than 30 mol % of an electron acceptor molecule, based on the total amount by mole of the electron donor molecule and the electron acceptor molecule, and emission intensity increases by temperature rise after photo-irradiation of the persistent luminescence emitter stops.Ģ.

Homo vs lumo