公开(公告)号：US11825687B2

公开(公告)日：2023-11-21

申请号：US16925777

申请日：2020-07-10

Applicant: The Regents of the University of Michigan ,  The University of Southern California

Inventor： Stephen R. Forrest ,  Yue Qu ,  Haonan Zhao ,  Mark E. Thompson

IPC: H10K50/852 ,  C09K11/06 ,  H10K50/11 ,  H10K85/30 ,  H10K101/10 ,  H10K50/13 ,  H10K50/854 ,  H10K59/32 ,  H10K101/30 ,  H10K102/00 ,  H10K59/90

CPC classification number: H10K50/852 ,  C09K11/06 ,  H10K50/11 ,  H10K85/371 ,  C09K2211/1029 ,  C09K2211/1044 ,  C09K2211/188 ,  H10K50/13 ,  H10K50/854 ,  H10K59/32 ,  H10K59/90 ,  H10K2101/10 ,  H10K2101/30 ,  H10K2102/00 ,  H10K2102/351

Abstract: An OLED device comprises a substrate, a first electrode positioned over the substrate, a second electrode positioned over the first electrode, at least one emissive layer positioned between the first and second electrodes in a first region of the OLED device, and a multilayer dielectric reflector stack, comprising a plurality of dielectric reflector layers positioned between the substrate and the first electrode, wherein the multilayer dielectric reflector stack is configured to form an optical cavity with the emissive layer having a Purcell Factor of at least 3.

公开(公告)号：US20250081720A1

公开(公告)日：2025-03-06

申请号：US18951352

申请日：2024-11-18

Applicant: The Regents of the University of Michigan

Inventor： Haonan Zhao ,  Stephen R. Forrest ,  Claire Arneson

IPC: H10K50/16 ,  H10K50/15 ,  H10K50/18 ,  H10K50/852 ,  H10K101/10 ,  H10K101/20 ,  H10K102/20

Abstract: An organic light emitting device comprises a first electrode, an organic emissive layer positioned over the first electrode, a charge transport layer positioned over the organic emissive layer, and a second electrode comprising a metal, positioned over the charge transport layer, wherein the charge transport layer and the second electrode are configured to form plasmon exciton polaritons between the second electrode and the charge transport layer, wherein the charge transport layer has large singlet extinction coefficients and oscillator strengths, and an absorption onset wavelength smaller than emission wavelength.

公开(公告)号：US20240268139A1

公开(公告)日：2024-08-08

申请号：US18413235

申请日：2024-01-16

Applicant: The Regents of the University of Michigan

Inventor： Haonan Zhao ,  Stephen R. Forrest

IPC: H10K50/12 ,  H10K50/13 ,  H10K50/15 ,  H10K50/16 ,  H10K50/856 ,  H10K101/10

CPC classification number: H10K50/12 ,  H10K50/13 ,  H10K50/15 ,  H10K50/16 ,  H10K50/856 ,  H10K2101/10

Abstract: An organic light emitting device comprises an anode and a cathode, an organic emissive layer positioned between the anode and the cathode, the organic emissive layer comprising a host material and a dopant, a host material layer positioned between the cathode and the organic emissive layer, and a charge transport layer positioned between the cathode and the host material layer, wherein the charge transport layer is configured to form plasmon exciton polaritons in a region between the cathode and the charge transport layer. Stacked devices are also disclosed.

公开(公告)号：US20230255047A1

公开(公告)日：2023-08-10

申请号：US18157308

申请日：2023-01-20

Applicant: The Regents of the University of Michigan

Inventor： Haonan Zhao ,  Stephen R. FORREST

IPC: H10K50/16 ,  H10K50/816 ,  H10K50/82

CPC classification number: H10K50/16 ,  H10K50/816 ,  H10K50/82 ,  H10K2102/20

Abstract: An OLED comprises a first electrode, an emissive layer positioned over the first electrode, a charge transport layer positioned over the emissive layer, and a second electrode positioned over the charge transport layer, wherein the charge transport layer is in direct contact with the second electrode, and wherein the charge transport layer has an index of refraction of at least 1.7. An OLED comprises a cavity formed between first and second metal electrodes, an organic light emitting element positioned within the cavity, and an efficiency enhancement layer positioned between the organic light emitting element and the second silver electrode, the efficiency enhancement layer having a refractive index of at least 1.7.

公开(公告)号：US20230092459A1

公开(公告)日：2023-03-23

申请号：US17932475

申请日：2022-09-15

Applicant: The Regents of the University of Michigan

Inventor： Haonan Zhao ,  Claire Arneson ,  Stephen R. FORREST

IPC: H01L51/52

Abstract: An organic light emitting device (OLED) comprises a substrate layer, a sub-electrode microlens array (SEMLA) at least partially embedded in the substrate layer comprising a plurality of microlenses, a first electrode layer over the substrate layer, a light emitting layer over the first electrode layer, and a second electrode layer over the light emitting layer. The device can further include a distributed Bragg reflector (DBR) layer between the substrate and first electrode layers and/or a Purcell Factor (PF) enhancement layer over the second electrode layer, comprising at least one layer pair including a silver mirror electrode and a metal-dielectric layer. Related methods are also disclosed.

公开(公告)号：US20220271260A1

公开(公告)日：2022-08-25

申请号：US17581736

申请日：2022-01-21

Applicant: The Regents of the University of Michigan

Inventor： Stephen R. FORREST ,  Haonan Zhao

IPC: H01L51/52

Abstract: An organic light emitting device comprises an emissive layer stack having an anode side and a cathode side, comprising at least one emissive layer comprising an organic emissive material, an anode layer stack comprising at least one conductive layer, a cathode layer stack comprising at least one conductive layer, an anode-side reflector positioned on the anode side of the emissive layer stack, and a cathode-side reflector positioned on the cathode side of the emissive layer stack, wherein the anode-side reflector and the cathode side reflector are configured to form a resonant, electrically pumped cavity for ultrastrong coupling having a quality factor of at least 10. An electrically-pumped organic light emitting device is also disclosed.

公开(公告)号：US20210020867A1

公开(公告)日：2021-01-21

申请号：US16925777

申请日：2020-07-10

Applicant: The Regents of the University of Michigan ,  The University of Southern California

Inventor： Stephen R. Forrest ,  Yue Qu ,  Haonan Zhao ,  Mark E. Thompson

IPC: H01L51/52 ,  H01L51/50 ,  C09K11/06 ,  H01L51/00

Abstract: An OLED device comprises a substrate, a first electrode positioned over the substrate, a second electrode positioned over the first electrode, at least one emissive layer positioned between the first and second electrodes in a first region of the OLED device, and a multilayer dielectric reflector stack, comprising a plurality of dielectric reflector layers positioned between the substrate and the first electrode, wherein the multilayer dielectric reflector stack is configured to form an optical cavity with the emissive layer having a Purcell Factor of at least 3.