公开(公告)号：US20220243122A1

公开(公告)日：2022-08-04

申请号：US17590226

申请日：2022-02-01

Applicant: Okinawa Institute of Science and Technology School Corporation

Inventor： Kazuya JINNAI ,  Ryota KABE ,  Chihaya ADACHI

IPC: C09K11/06 ,  H01L51/00

Abstract: Disclosed is a persistent luminescence emitter containing at least 70 mol % of an electron donor molecule and less than 30 mol % of an electron acceptor molecule wherein an electron transfer occurs from the electron donor molecule to the electron acceptor molecule by photo-irradiation of the persistent luminescence emitter, and after photo-irradiation of the persistent luminescence emitter stops, emission intensity decays non-exponentially.

公开(公告)号：US20220246861A1

公开(公告)日：2022-08-04

申请号：US17590251

申请日：2022-02-01

Applicant: Okinawa Institute of Science and Technology School Corporation

Inventor： Kazuya JINNAI ,  Ryota KABE ,  Chihaya ADACHI

IPC: H01L51/00

Abstract: Disclosed is a persistent luminescence emitter containing an electron donor molecule and an electron acceptor molecule having a LUMO level of lower than −3.5 eV, wherein emission intensity increases by temperature rise after photo-irradiation of the persistent luminescence emitter stops.

公开(公告)号：US20230101415A1

公开(公告)日：2023-03-30

申请号：US17822223

申请日：2022-08-25

Applicant: Okinawa Institute of Science and Technology School Corporation

Inventor： Zesen LIN ,  Ryota KABE

IPC: C09K11/06 ,  C08F220/30

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.

公开(公告)号：US20220119702A1

公开(公告)日：2022-04-21

申请号：US17475718

申请日：2021-09-15

Applicant: Okinawa Institute of Science and Technology School Corporation

Inventor： Ryota KABE ,  Takashi TACHIKAWA

IPC: C09K11/06

Abstract: Photostimulated luminescence, which allows energy or data to be stored and released using electromagnetic waves as both the input and output, has attracted considerable interest in the fields of biomedical and informatics technologies, but this phenomenon is mostly limited to solid inorganic materials. Here, we report photostimulated luminescence from purely organic blend films composed of electron donor, acceptor, and trap/emitter molecules. In the films, charges are accumulated as radical ions by ultraviolet light irradiation and then extracted by near infrared light irradiation to produce visible light. Films are capable of multiple cycles (>10 times) of organic photostimulated luminescence, which was still observable from films left in the dark at room temperature for one week after excitation, and emission color could be varied by changing the trap/emitter molecules. These findings will broadly impact existing applications and provide new prospects for innovative flexible devices.