Patents by Inventor Dawen Li
Dawen Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220384727Abstract: Disclosed herein are methods of annealing a perovskite layer, comprising irradiating the perovskite layer with a light source, wherein the light source is a UV light emitting diode or array of UV-LEDs for rapid and large-area exposure without scanning over the perovskite film, wherein the light source emits radiation consisting essentially of wavelengths within 50 nm of the wavelength of maximum absorbance (?max) of the perovskite layer, thereby annealing the perovskite layer. Also disclosed herein are semiconducting devices and articles of manufacture comprising an annealed perovskite layer made by any of the methods described herein, such as solar cells, light-emitting diodes, photodetectors, thin-film transistors, laser diodes, and combinations thereof.Type: ApplicationFiled: August 4, 2022Publication date: December 1, 2022Inventors: Dawen Li, Zhongliang Ouyang
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Patent number: 11444245Abstract: Disclosed herein are methods of annealing a perovskite layer, comprising irradiating the perovskite layer with a light source, wherein the light source emits radiation consisting essentially of wavelengths within 50 nm of the wavelength of maximum absorbance (?max) of the perovskite layer, thereby annealing the perovskite layer. Also disclosed herein are semiconducting devices and articles of manufacture comprising an annealed perovskite layer made by any of the methods described herein, such as solar cells, light-emitting diodes, photodetectors, thin-film transistors, and combinations thereof.Type: GrantFiled: August 7, 2019Date of Patent: September 13, 2022Assignee: The Board of Trustees of The University of AlabamaInventors: Dawen Li, Zhongliang Ouyang
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Publication number: 20220181553Abstract: Methods of annealing and/or sintering a transparent conductive oxide (TCO) film disclosed, and wherein the TCO film comprises indium tin oxide film (ITO), fluorine-doped tin film (FTO), indium doped zinc oxide (IZO), or aluminum-doped zinc oxide (AZO). Such methods involve irradiating the TCO film with a light source and where the annealing and/or sintering is selective to the TCO film.Type: ApplicationFiled: November 30, 2021Publication date: June 9, 2022Inventor: Dawen Li
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Patent number: 11151777Abstract: A non-maximum suppression operation device and system; the non-maximum suppression operation device includes: a data access module to import external data or export a non-maximum suppression computation result of the external data; a control module to send a control signal for performing a computation on the external data; and an operation module to perform an intersection-over-union computation on the external data on the basis of the control signal to obtain an intersection-over-union computation result, and to compare the intersection-over-union computation result with a preset threshold value to obtain the non-maximum suppression computation result.Type: GrantFiled: March 26, 2019Date of Patent: October 19, 2021Assignee: SHANGHAI XIAOYI TECHNOLOGY CO., LTD.Inventor: Dawen Li
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Patent number: 11094884Abstract: Methods of forming a perovskite-containing film comprising depositing one or more metal oxide layers onto a substrate; and irradiating each metal oxide layer with a UV LED light source after deposition to sinter and/or anneal a target metal oxide in the one or more metal oxide layers without damaging the underlying substrate or perovskite material. The LED light source can be selected to emit a narrow spectral width of pulsed radiation. The radiation emitted can consist essentially of wavelengths within 20 nm of the wavelength of maximum absorbance (?max) of the target metal oxide, that is, wavelength from UV LED can be ?max±20 nm, to achieve layer-specific annealing and sintering of metal oxide charge transport layer. The target metal oxide can include tin oxide in the electron transport layer or nickel oxide in the hole transport layer. Perovskite-containing films formed from the methods described herein are also disclosed.Type: GrantFiled: January 14, 2019Date of Patent: August 17, 2021Assignee: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ALABAMAInventors: Dawen Li, Zhongliang Ouyang
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Publication number: 20200127204Abstract: Disclosed herein are methods of annealing a perovskite layer, comprising irradiating the perovskite layer with a light source, wherein the light source emits radiation consisting essentially of wavelengths within 50 nm of the wavelength of maximum absorbance (?max) of the perovskite layer, thereby annealing the perovskite layer. Also disclosed herein are semiconducting devices and articles of manufacture comprising an annealed perovskite layer made by any of the methods described herein, such as solar cells, light-emitting diodes, photodetectors, thin-film transistors, and combinations thereof.Type: ApplicationFiled: August 7, 2019Publication date: April 23, 2020Inventors: Dawen Li, Zhongliang Ouyang
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Publication number: 20190304171Abstract: A non-maximum suppression operation device and system; the non-maximum suppression operation device includes: a data access module to import external data or export a non-maximum suppression computation result of the external data; a control module to send a control signal for performing a computation on the external data; and an operation module to perform an intersection-over-union computation on the external data on the basis of the control signal to obtain an intersection-over-union computation result, and to compare the intersection-over-union computation result with a preset threshold value to obtain the non-maximum suppression computation result.Type: ApplicationFiled: March 26, 2019Publication date: October 3, 2019Applicant: Shanghai Xiaoyi Technology Co., Ltd.Inventor: Dawen LI
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Publication number: 20190221742Abstract: Methods of forming a perovskite-containing film comprising depositing one or more metal oxide layers onto a substrate; and irradiating each metal oxide layer with a UV LED light source after deposition to sinter and/or anneal a target metal oxide in the one or more metal oxide layers without damaging the underlying substrate or perovskite material. The LED light source can be selected to emit a narrow spectral width of pulsed radiation. The radiation emitted can consist essentially of wavelengths within 20 nm of the wavelength of maximum absorbance (?max) of the target metal oxide, that is, wavelength from UV LED can be ?max±20 nm, to achieve layer-specific annealing and sintering of metal oxide charge transport layer. The target metal oxide can include tin oxide in the electron transport layer or nickel oxide in the hole transport layer. Perovskite-containing films formed from the methods described herein are also disclosed.Type: ApplicationFiled: January 14, 2019Publication date: July 18, 2019Inventors: Dawen Li, Zhongliang Ouyang
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Publication number: 20150372236Abstract: Disclosed herein are temperature-gradient methods of producing well-oriented TIPS pentacene crystals and films comprising establishing a temperature gradient on a substrate to produce a heated substrate having a lower temperature portion at a first temperature and a higher temperature portion at a second temperature and applying a solution comprising 6,13-bis(triisopropylsilylethynyl)pentacene to the heated substrate, driving crystallization from the lower temperature portion of the substrate to the higher temperature portion of the substrate.Type: ApplicationFiled: April 5, 2013Publication date: December 24, 2015Inventors: Dawen LI, Kyeiwaa ASARE-YEBOAH, Rachel M. FRAZIER
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Patent number: 7470574Abstract: The present invention provides a dual organic field-effect transistor (OFET) structure and a method of fabricating the structure. The dual OFET structure includes an n-type organic semiconductor layer and a p-type organic semiconductor layer in contact with each other along an interface and forming a stack. The dual OFET structure also includes a source electrode and a drain electrode, the source and drain electrodes being in contact with one of the organic semiconductor layers. The dual OFET structure further includes first and second gate structures located on opposite sides of the stack. The first gate structure is configured to control a channel region of the n-type organic semiconductor layer, and the second gate structure is configured to control a channel region of the p-type organic semiconductor layer.Type: GrantFiled: January 12, 2006Date of Patent: December 30, 2008Assignee: Alcatel-Lucent USA Inc.Inventors: Zhenan Bao, Evert-Jan Borkent, Dawen Li
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Publication number: 20060138406Abstract: The present invention provides a dual organic field-effect transistor (OFET) structure and a method of fabricating the structure. The dual OFET structure includes an n-type organic semiconductor layer and a p-type organic semiconductor layer in contact with each other along an interface and forming a stack. The dual OFET structure also includes a source electrode and a drain electrode, the source and drain electrodes being in contact with one of the organic semiconductor layers. The dual OFET structure further includes first and second gate structures located on opposite sides of the stack. The first gate structure is configured to control a channel region of the n-type organic semiconductor layer, and the second gate structure is configured to control a channel region of the p-type organic semiconductor layer.Type: ApplicationFiled: January 12, 2006Publication date: June 29, 2006Applicant: Lucent Technologies Inc.Inventors: Zhenan Bao, Evert-Jan Borkent, Dawen Li
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Patent number: 7045814Abstract: The present invention provides a dual organic field-effect transistor (OFET) structure and a method of fabricating the structure. The dual OFET structure includes an n-type organic semiconductor layer and a p-type organic semiconductor layer in contact with each other along an interface and forming a stack. The dual OFET structure also includes a source electrode and a drain electrode, the source and drain electrodes being in contact with one of the organic semiconductor layers. The dual OFET structure further includes first and second gate structures located on opposite sides of the stack. The first gate structure is configured to control a channel region of the n-type organic semiconductor layer, and the second gate structure is configured to control a channel region of the p-type organic semiconductor layer.Type: GrantFiled: June 24, 2004Date of Patent: May 16, 2006Assignee: Lucent Technologies Inc.Inventors: Zhenan Bao, Evert-Jan Borkent, Dawen Li
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Publication number: 20050285099Abstract: The present invention provides a dual organic field-effect transistor (OFET) structure and a method of fabricating the structure. The dual OFET structure includes an n-type organic semiconductor layer and a p-type organic semiconductor layer in contact with each other along an interface and forming a stack. The dual OFET structure also includes a source electrode and a drain electrode, the source and drain electrodes being in contact with one of the organic semiconductor layers. The dual OFET structure further includes first and second gate structures located on opposite sides of the stack. The first gate structure is configured to control a channel region of the n-type organic semiconductor layer, and the second gate structure is configured to control a channel region of the p-type organic semiconductor layer.Type: ApplicationFiled: June 24, 2004Publication date: December 29, 2005Applicant: Lucent Technologies Inc.Inventors: Zhenan Bao, Evert-Jan Borkent, Dawen Li