Patents by Inventor Doh-Kwon Lee

Doh-Kwon Lee 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).

  • Publication number: 20200343309
    Abstract: Disclosed are a monolithic solar cell and a method of manufacturing the same. More particularly, the present invention provides a monolithic solar cell including a first solar cell formed by sequentially stacking an electrode, a silicon substrate, and an n-type emitter layer; a junction layer formed on the an n-type emitter layer; an interfacial layer formed on the junction layer; and a second solar cell including a perovskite layer and integrated onto the interfacial layer. The interfacial layer according to the present invention may be pyrolyzed and thus partially or completely lost during a monolithic solar cell manufacturing process. In addition, by providing an interfacial layer between the two cells constituting a monolithic solar cell according to the present invention, charge transfer and recombination characteristics between the two cells can be improved and thus a monolithic solar cell having significantly improved photoelectric conversion efficiency can be provided.
    Type: Application
    Filed: November 27, 2017
    Publication date: October 29, 2020
    Inventors: Doh Kwon LEE, Yoon Hee Jang, In Ho Kim, Hee Sun Yun, Jeung Hyun Jeong
  • Publication number: 20200343404
    Abstract: An embodiment includes a method of texturing a semiconductor substrate, a semiconductor substrate manufactured using the method, and a solar cell including the semiconductor substrate, the method including: forming metal nanoparticles on a semiconductor substrate, primarily etching the semiconductor substrate, removing the metal nanoparticles, and secondarily etching the primarily etched semiconductor substrate to form nanostructures.
    Type: Application
    Filed: November 1, 2017
    Publication date: October 29, 2020
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Doh Kwon LEE, In Ho Kim, Won Mok Kim, Jong Keuk Park, Taek Sung Lee, Doo Seok Jeong, Hyeon Seung Lee, Jeung Hyun Jeong
  • Publication number: 20200274007
    Abstract: Provided is a color-controllable thin-film solar cell including a transparent electrode layer disposed on an absorption layer, and color structure patterns disposed on at least parts of the transparent electrode layer.
    Type: Application
    Filed: March 27, 2019
    Publication date: August 27, 2020
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jeung Hyun JEONG, Kyeong Seok Lee, Doh Kwon Lee, Won Mok Kim, Hyeong Geun Yu
  • Patent number: 10566478
    Abstract: Provided are a thin-film solar cell module structure and a method of manufacturing the same.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: February 18, 2020
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jeung-Hyun Jeong, Jong-Keuk Park, Won Mok Kim, Seung Hee Han, Doh Kwon Lee
  • Publication number: 20200025988
    Abstract: An exemplary embodiment relates to a nano-color coating layer and a method of forming the same, and more particularly, to a color structure representing a back side-reflection color with metallic luster and high chroma when observed in a substrate incident mode by greatly enhancing light absorbance at a specific wavelength using a resonance structure in which a light absorbing material is inserted between a transparent substrate and an upper mirror layer. In addition, the exemplary embodiment provides a color structure which controls metallic luster and texture of a high-chroma color from gloss-semi-gloss-matte texture in various ways by introducing a haze surface structure in which light scattering occurs on at least one surface of the transparent substrate.
    Type: Application
    Filed: July 12, 2019
    Publication date: January 23, 2020
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Kyeong Seok LEE, Doh Kwon Lee, Jeung Hyun Jeong, Won Mok Kim
  • Patent number: 10504660
    Abstract: Disclosed is a method for adsorbing a dye for a dye-sensitized solar cell. The method includes: coating a paste including metal oxide nanoparticles on the upper surface of a titanium oxide thin film and calcining the coated paste to form a porous film; adding an additive to a sensitizing dye solution to promote the adsorption of the dye; and dipping the porous film in the sensitizing dye solution to adsorb the sensitizing dye onto the surface of the porous film. The sensitizing dye solution is a dispersion of the sensitizing dye in an organic solvent. Also disclosed are a working electrode prepared using the sensitizing dye solution and a dye-sensitized solar cell including the working electrode. The addition of the additive shortens the time of dye adsorption. Despite the shortened adsorption time, the dye does not undergo desorption in the long term as well as in the short term, ensuring long-term stability of the solar cell.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: December 10, 2019
    Assignee: Korean Institute of Science and Technology
    Inventors: Min Jae Ko, Bong Soo Kim, Jin Young Kim, Hong Gon Kim, Hae Jung Son, Doh-Kwon Lee, Jin Ah Lee, Hee Suk Jung, Hwa Young Jin
  • Patent number: 10431759
    Abstract: Disclosed is an electron transport layer for a flexible perovskite solar cell. The electron transport layer includes transition metal-doped titanium dioxide particles. The titanium dioxide particles are densely packed in the electron transport layer. The electron transport layer is transparent. The use of the electron transport layer enables the fabrication of a flexible perovskite solar cell with high power conversion efficiency. Also disclosed is a flexible perovskite solar cell employing the electron transport layer.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: October 1, 2019
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Min Jae Ko, Jin Joo, Hae Jung Son, Jai Kyeong Kim, Doh-Kwon Lee, Inyoung Jeong
  • Publication number: 20190267502
    Abstract: The present invention discloses a method for preparing a compound thin film, a compound thin film prepared therefrom, and a solar cell including the compound thin film. An exemplary embodiment of the present invention provides a method for preparing a compound thin film, the method including: an electrolyte solution preparation step; a circuit configuration step; and a thin film production step in which a compound thin film with a specific pattern provided on the surface thereof is produced according to the difference in the thickness of the thin film between a region where light arrives and a region where light does not arrive.
    Type: Application
    Filed: November 1, 2017
    Publication date: August 29, 2019
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Doh Kwon LEE, In Ho KIM, Hee Sun YUN, Jang Mi LEE
  • Publication number: 20190157481
    Abstract: According to an aspect of the present invention, there is provided a method of manufacturing a compound thin film, which includes configuring an electrodeposition circuit by connecting an electrolytic solution, which is manufactured by mixing a predetermined precursor with a solvent, and an electrochemical cell, which includes a working electrode in a form of an electrode at which a specific pattern is patterned on a predetermined substrate, to a voltage application device or a current application device, and applying a reduction voltage or current to the working electrode using the voltage application device or the current application device, and selectively electrodepositing a thin film in some region of the electrode along a shape of the electrode at which the specific pattern is patterned.
    Type: Application
    Filed: August 24, 2018
    Publication date: May 23, 2019
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Doh-Kwon LEE, Jangmi Lee, Inho Kim, Jeung-hyun Jeong
  • Publication number: 20180108795
    Abstract: Provided are a thin-film solar cell module structure and a method of manufacturing the same.
    Type: Application
    Filed: September 15, 2017
    Publication date: April 19, 2018
    Inventors: Jeung-Hyun JEONG, Jong-Keuk PARK, Won Mok KIM, Seung Hee HAN, Doh Kwon LEE
  • Patent number: 9941476
    Abstract: The present disclosure provides an organic semiconductor compound, which has superior charge mobility, low band gap, wide light absorption area and adequate molecular energy level. The conductive organic semiconductor compound of the present disclosure can be used as a material for various organic optoelectric devices such as an organic photodiode (OPD), an organic light-emitting diode (OLED), an organic thin-film transistor (OTFT), an organic solar cell, etc. In addition, it can be prepared into a thin film via a solution process, can be advantageously used to fabricate large-area devices and can reduce the cost of device fabrication.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: April 10, 2018
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hae Jung Son, Min Jae Ko, Bong Soo Kim, Doh-Kwon Lee, Jin Young Kim, Hong Gon Kim, Sungmin Park
  • Publication number: 20170288159
    Abstract: Disclosed is an electron transport layer for a flexible perovskite solar cell. The electron transport layer includes transition metal-doped titanium dioxide particles. The titanium dioxide particles are densely packed in the electron transport layer. The electron transport layer is transparent. The use of the electron transport layer enables the fabrication of a flexible perovskite solar cell with high power conversion efficiency. Also disclosed is a flexible perovskite solar cell employing the electron transport layer.
    Type: Application
    Filed: January 10, 2017
    Publication date: October 5, 2017
    Inventors: Min Jae KO, Jin JOO, Hae Jung SON, Jai Kyeong KIM, Doh-Kwon LEE, Inyoung JEONG
  • Patent number: 9735365
    Abstract: The present disclosure relates to a novel polymer compound and a method for preparing the same. More particularly, the present disclosure relates to a novel conductive low band gap electron donor polymer compound having high photon absorptivity and improved hole mobility, a method for preparing the same and an organic photovoltaic cell containing the same. Since the conductive polymer compound as a low band gap electron donor exhibits high photon absorptivity and superior hole mobility, it can be usefully used as a material for an organic optoelectronic device such as an organic photodiode (OPD), an organic thin-film transistor (OTFT), an organic light-emitting diode (OLED), an organic photovoltaic cell, etc. as well as in the development of a n-type material.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: August 15, 2017
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bong Soo Kim, Hyo Sang Lee, Hong Gon Kim, Min Jae Ko, Doh-Kwon Lee, Jin Young Kim, Hae Jung Son
  • Patent number: 9530570
    Abstract: The present description is directed to a manufacturing method of solid-state dye-sensitized solar cells and a solid-state electrolyte filling device used in the manufacturing method. The present invention provides a manufacturing method of dye-sensitized solar cells that fills the solid-state electrolyte more uniformly with enhanced efficiency to secure higher light-to-energy conversion efficiency.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: December 27, 2016
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Min-Jae Ko, Doh-Kwon Lee, Hong-Gon Kim, Jin-Young Kim, Ki-Cheon Yoo, Jin-Ah Lee, Bong-Soo Kim
  • Publication number: 20160315277
    Abstract: Disclosed is a moisture barrier film for an organic-inorganic hybrid photovoltaic cell which includes an ionic polymer. Also disclosed is an organic-inorganic hybrid photovoltaic cell including the moisture barrier film. The photovoltaic cell has a structure in which the moisture barrier film including an ionic polymer is formed on an absorber layer including an organic-inorganic hybrid perovskite compound. Due to this structure, the moisture barrier film effectively protects the organic-inorganic hybrid perovskite absorber layer, which is very susceptible to moisture, and other constituent layers, from moisture from the external environment so that excellent characteristics of the photovoltaic cell can be maintained for a long time. In other words, the moisture barrier film including an ionic polymer is interposed between the absorber layer and a hole transport layer or between the hole transport layer and a second electrode to enhance the physical and chemical binding therebetween.
    Type: Application
    Filed: February 25, 2016
    Publication date: October 27, 2016
    Inventors: Hae Jung SON, Min Jae KO, Doh-Kwon LEE, Jin Young KIM, Jai Kyeong KIM, Jae Hoon YUN, Hyun Soo CHO, Yujeong KIM
  • Publication number: 20160293872
    Abstract: Disclosed are inorganic nanomaterial-based hydrophobic charge carriers and an organic-inorganic hybrid perovskite solar cell using the charge carriers. In the solar cell, the charge carriers are used as materials for a charge transport layer. The solar cell has high photoelectric efficiency for its price. In addition, the solar cell is prevented from being degraded by moisture. Therefore, the solar cell can be operated stably for a long time despite long-term exposure to a humid environment.
    Type: Application
    Filed: March 29, 2016
    Publication date: October 6, 2016
    Inventors: Min Jae KO, Hae Jung SON, Jin Young KIM, Doh-Kwon LEE, Hee Suk JUNG, Bonkee KOO
  • Publication number: 20160225999
    Abstract: Provided is an organic-inorganic hybrid photoelectric conversion device including a novel conductive organic semiconductor compound including paracyclophene and an organic-inorganic perovskite compound. A hole transport layer containing the conductive organic semiconductor compound including paracyclophene and a light absorbing layer are bound well organically with each other. Thus, it is possible to accomplish high photoelectric conversion efficiency. In addition, the organic-inorganic hybrid photoelectric conversion device is formed of a solid phase and has high stability, uses inexpensive materials, is obtained by a simple and easy process at low processing cost, and thus allows mass production with high cost efficiency, resulting in high commercial viability.
    Type: Application
    Filed: August 3, 2015
    Publication date: August 4, 2016
    Inventors: Hae Jung SON, Min Jae KO, Hong Gon KIM, Doh-Kwon LEE, Bong Soo KIM, Jin Young KIM, Sungmin PARK, Hyun Soo CHO
  • Publication number: 20160149137
    Abstract: The present disclosure provides an organic semiconductor compound, which has superior charge mobility, low band gap, wide light absorption area and adequate molecular energy level. The conductive organic semiconductor compound of the present disclosure can be used as a material for various organic optoelectric devices such as an organic photodiode (OPD), an organic light-emitting diode (OLED), an organic thin-film transistor (OTFT), an organic solar cell, etc. In addition, it can be prepared into a thin film via a solution process, can be advantageously used to fabricate large-area devices and can reduce the cost of device fabrication.
    Type: Application
    Filed: March 17, 2015
    Publication date: May 26, 2016
    Inventors: Hae Jung SON, Min Jae KO, Bong Soo KIM, Doh-Kwon LEE, Jin Young KIM, Hong Gon KIM, Sungmin PARK
  • Patent number: 9336957
    Abstract: The following description relates to a method of low temperature sintering a catalyst layer that formed on one side of a counter electrode using a laser. It is possible to prepare a counter electrode for a dye-sensitized solar cell (DSSC) based on a flexible substrate easily because the method can be applied to a conducting substrate made of plastic materials as well as a conducting glass substrate.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: May 10, 2016
    Assignee: Korea Institute of Science and Technology
    Inventors: Min-Jae Ko, Tae-Yeon Kang, Kyung-Kon Kim, Doh-Kwon Lee, Hong-Gon Kim
  • Publication number: 20160126483
    Abstract: Provided is a new ternary Zn2SnO4 (ZSO) electron-transporting electrode of a CH3NH3PbI3 perovskite solar cell as an alternative to the conventional TiO2 electrode. The ZSO-based perovskite solar cell exhibits faster electron transport (˜10 times) and superior charge-collecting capability compared to the TiO2-based perovskite solar cell with similar thickness and energy conversion efficiency.
    Type: Application
    Filed: May 22, 2015
    Publication date: May 5, 2016
    Inventors: Jin Young KIM, Doh-Kwon LEE, Hong Gon KIM, Bong Soo KIM, Lee Seul OH, Min Ah PARK, Hae Jung SON, Min Jae KO