Long-persistent luminescence emitter and long-persistent luminescent device
AssigneeOkinawa Institute of Science and Technology School Corporation
InventorsZesen Lin, Ryota Kabe
Life of this patent
Estimating the term…
Abstract
A long-persistent luminescence emitter containing a polymer that contains, relative to the total molar amount of an electron donor structural unit and an electron acceptor structural unit therein, 70 mol % or more of an electron donor structural unit and less than 30 mol % of an electron acceptor structural unit, or containing a polymer that contains, relative to the total molar amount of an electron donor structural unit and an electron acceptor structural unit therein. 70 mol % or more of an electron acceptor structural unit and less than 30 mol % of an electron donor structural unit. The emission decay after stopping light irradiation to the emitter is power law decay.
Claims9
A long-persistent luminescence emitter that emits light for 0.1 seconds or longer after stopping light irradiation of the long-persistent luminescence emitter;
- wherein the long-persistent luminescence emitter contains a polymer that contains, relative to a total molar amount of an electron donor structural unit and an electron acceptor structural unit therein, 70 mol % or more of an electron donor structural unit and less than 30 mol % of an electron acceptor structural unit, or contains a polymer that contains, relative to a total molar amount of an electron donor structural unit and an electron acceptor structural unit therein, 70 mol % or more of an electron acceptor structural unit and less than 30 mol % of an electron donor structural unit, wherein:
- an energy level of HOMO of the electron donor structural unit is higher than that of the electron acceptor structural unit,
- an electron transfer from the electron donor structural unit to the electron acceptor structural unit occurs by light irradiation of the long-persistent luminescence emitter, and
- an emission decay after stopping light irradiation of the long-persistent luminescence emitter is a power law decay.
Dependencies are inferred from the claim text.