公开(公告)号：US12213331B2

公开(公告)日：2025-01-28

申请号：US17585384

申请日：2022-01-26

Applicant: The Regents of the University of Michigan

Inventor： Byungjun Lee ,  Jongchan Kim ,  Stephen R. Forrest

IPC: H01L51/50 ,  H10K50/11 ,  H10K50/13 ,  H10K50/85 ,  H10K71/00 ,  H10K50/15 ,  H10K50/17 ,  H10K101/40 ,  H10K102/00

Abstract: An organic electronic optoelectronic device comprises a substrate, a first electrode positioned over the substrate, a first organic buffer layer positioned over the first electrode, and a first inorganic emissive layer positioned over the first organic buffer layer. A method of fabricating an organic optoelectronic device is also disclosed.

公开(公告)号：US20170076986A1

公开(公告)日：2017-03-16

申请号：US15212104

申请日：2016-07-15

Applicant: The Regents of the University of Michigan

Inventor： Stephen R. Forrest ,  Kyusang Lee ,  Dejiu Fan ,  Byungjun Lee

IPC: H01L21/78 ,  C30B33/02 ,  C30B33/10 ,  C30B33/12 ,  C23F1/16 ,  C23F4/00

CPC classification number: H01L21/7813 ,  C30B29/42 ,  C30B33/02 ,  C30B33/10 ,  C30B33/12 ,  H01L21/30612 ,  H01L31/1896

Abstract: Disclosed are methods for preserving the integrity of large-sized growth substrates. The methods pertain to accelerating the rate of epitaxial liftoff, and improved cleaning and etching steps. Also disclosed are devices produced therein.

Abstract translation: 公开了保留大尺寸生长基质完整性的方法。 该方法涉及加速外延提升速率，以及改进的清洗和蚀刻步骤。 还公开了其中生产的装置。

公开(公告)号：US11901473B2

公开(公告)日：2024-02-13

申请号：US17232243

申请日：2021-04-16

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Tobias Burger ,  Byungjun Lee ,  Dejiu Fan ,  Andrej Lenert ,  Stephen R. Forrest

IPC: H01L31/0735 ,  H01L31/0687 ,  H01L31/18 ,  G03F7/00 ,  H01L31/0232 ,  H01L31/0264 ,  H01L33/00 ,  C30B25/04 ,  C30B25/22 ,  H01L31/043

CPC classification number: H01L31/0687 ,  C30B25/04 ,  C30B25/22 ,  G03F7/0005 ,  H01L31/0264 ,  H01L31/02327 ,  H01L31/043 ,  H01L31/0735 ,  H01L31/1852 ,  H01L31/1896 ,  H01L33/0093

Abstract: To reach high efficiencies, thermophotovoltaic cells must utilize the broad spectrum of a radiative thermal source. One promising approach to overcome this challenge is to have low-energy photons reflected and reabsorbed by the thermal emitter, where their energy can have another chance at contributing toward photogeneration in the cell. However, current methods for photon recuperation are limited by insufficient bandwidth or parasitic absorption, resulting in large efficiency losses relative to theoretical limits. This work demonstrates nearly perfect reflection of low-energy photons (˜99%) by embedding an air layer within the TPV cell. This result represents a four-fold reduction in parasitic absorption relative to existing TPV cells. As out-of-band reflectance approaches unity, TPV efficiency becomes nearly insensitive to cell bandgap and emitter temperature. Accessing this regime unlocks a range of possible materials and heat sources that were previously inaccessible to TPV energy conversion.

公开(公告)号：US11538953B2

公开(公告)日：2022-12-27

申请号：US16076825

申请日：2017-02-22

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Stephen R. Forrest ,  Kyusang Lee ,  Byungjun Lee

IPC: H01L31/054 ,  H01L31/042 ,  H01L31/052 ,  H01L31/18

Abstract: The present disclosure relates to compound parabolic concentrators. In one implementation, a compound parabolic concentrator may include a parabolic array having a base, a side wall, and an aperture for receiving light and a dielectric layer having a refractive index. In another implementation, a stacked compound parabolic concentrator may include a parabolic array having a base, a side wall, and an aperture for receiving light and multiple dielectric layers within the array. Each dielectric layer may have a refractive index, and the refractive index may decrease with each dielectric layer moving from the base of the parabolic array to the light receiving aperture.

公开(公告)号：US20190044014A1

公开(公告)日：2019-02-07

申请号：US16076825

申请日：2017-02-22

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Stephen R. FORREST ,  Kyusnag LEE ,  Byungjun Lee

IPC: H01L31/054 ,  H01L31/18 ,  H01L31/042 ,  H01L31/052

Abstract: The present disclosure relates to compound parabolic concentrators. In one implementation, a compound parabolic concentrator may include a parabolic array having a base, a side wall, and an aperture for receiving light and a dielectric layer having a refractive index. In another implementation, a stacked compound parabolic concentrator may include a parabolic array having a base, a side wall, and an aperture for receiving light and multiple dielectric layers within the array. Each dielectric layer may have a refractive index, and the refractive index may decrease with each dielectric layer moving from the base of the parabolic array to the light receiving aperture.

公开(公告)号：US20220271250A1

公开(公告)日：2022-08-25

申请号：US17585384

申请日：2022-01-26

Applicant: The Regents of the University of Michigan

Inventor： Byungjun Lee ,  Jongchan Kim ,  Stephen R. Forrest

IPC: H01L51/50 ,  H01L51/56 ,  H01L51/52

Abstract: An organic electronic optoelectronic device comprises a substrate, a first electrode positioned over the substrate, a first organic buffer layer positioned over the first electrode, and a first inorganic emissive layer positioned over the first organic buffer layer. A method of fabricating an organic optoelectronic device is also disclosed.