Patents by Inventor Sang Il Seok
Sang Il Seok 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: 20150228415Abstract: Provided is a solar cell including: a first electrode; a composite layer positioned on the first electrode and including a light absorber impregnated thereinto; a light absorption structure positioned on the composite layer and composed of a light absorber; a hole conductive layer positioned on the light absorption structure; and a second electrode positioned on the hole conductive layer.Type: ApplicationFiled: September 12, 2013Publication date: August 13, 2015Inventors: Sang il Seok, Sang Hyuk Im, Jun Hong Noh, Jin Hyuck Heo
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Patent number: 9059418Abstract: Provided is a method for manufacturing a significantly high efficient solar cell having a novel structure and superior stability, and which can be mass-produced from an inexpensive material from an inexpensive material for enabling the easy commercial availability thereof. More particularly, the method of the present invention comprises the following step: (a) depositing slurry containing metal oxide particles and heat-treating the slurry to form a porous electron transporting layer; (b) forming inorganic semiconductors on surfaces of the metal oxide particles for the porous electron-transporting layer; and (c) impregnating the porous electron-transporting layer having the inorganic semiconductor formed thereon with a solution containing an organic photovoltaic material so as to form a hole transporting layer.Type: GrantFiled: February 18, 2011Date of Patent: June 16, 2015Assignee: Korea Research Institute of Chemical TechnologyInventors: Sang Il Seok, Sang Hyuk Im, Jeong Ah Chang, Jae Hui Rhee, Yong Hui Lee, Hi Jung Kim
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Publication number: 20130065354Abstract: Provided is a method for manufacturing a significantly high efficient solar cell having a novel structure and superior stability, and which can be mass-produced from an inexpensive material from an inexpensive material for enabling the easy commercial availability thereof. More particularly, the method of the present invention comprises the following step: (a) depositing slurry containing metal oxide particles and heat-treating the slurry to form a porous electron transporting layer; (b) forming inorganic semiconductors on surfaces of the metal oxide particles for the porous electron-transporting layer; and (c) impregnating the porous electron-transporting layer having the inorganic semiconductor formed thereon with a solution containing an organic photovoltaic material so as to form a hole transporting layer.Type: ApplicationFiled: February 18, 2011Publication date: March 14, 2013Applicant: Korea Research Institute of Chemical TechnologyInventors: Sang Il Seok, Sang Hyuk Im, Jeong Ah Chang, Jae Hui Rhee, Yong Hui Lee, Hi Jung Kim
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Publication number: 20120312375Abstract: Provided is a highly efficient solar cell having a novel structure and excellent stability, and which may be mass-produced from an inexpensive material for enabling easy commercial availability thereof. More particularly, the solar cell of the present invention comprises: a porous inorganic electron-transporting layer containing metallic oxide particles; a light absorber containing inorganic semiconductors; and an organic hole transporting layer containing an organic photo-voltaic material.Type: ApplicationFiled: February 18, 2011Publication date: December 13, 2012Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Sang Il Seok, Sang Hyuk Im, Jeong Ah Chang, Jae Hui Lee, Yong Hui Lee, Hi Jung Kim
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Patent number: 7887780Abstract: Provided is a process which includes slowly adding dropwise chilled distilled water to titanium tetrachloride to prepare solution of titanium oxychloride; adding basic solution thereto to maintain pH of the titanium oxychloride solution within a range from 3.5 to 4, thereby providing a suspension of titanium oxyhydroxide precipitate; adding basic solution thereto to adjust the suspension of titanium oxyhydroxide precipitate to be weakly basic, and heating and stirring the mixture at 80 to 100° C.; isolating and collecting dihydroxy-oxotitanium from the heated and stirred suspension of titanium oxyhydroxide precipitate, and washing it with weakly basic aqueous solution; and adding distilled water and 20 to 500 folds of hydrogen peroxide on the basis of 1 mole of Ti4+ in titanium oxyhydroxide to the washed titanium oxyhydroxide, and heat-treating the mixture at a temperature of 90 to 100° C. for 1 to 7 days to prepare titania nanorods having the mean length of 100 nm to 300 nm.Type: GrantFiled: May 26, 2009Date of Patent: February 15, 2011Assignee: Korea Research Institute of Chemical TechnologyInventors: Sang Il Seok, In Chan Baek, Jeong Ah Chang
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Publication number: 20090291044Abstract: Provided is a process which includes slowly adding dropwise chilled distilled water to titanium tetrachloride to prepare solution of titanium oxychloride; adding basic solution thereto to maintain pH of the titanium oxychloride solution within a range from 3.5 to 4, thereby providing a suspension of titanium oxyhydroxide precipitate; adding basic solution thereto to adjust the suspension of titanium oxyhydroxide precipitate to be weakly basic, and heating and stirring the mixture at 80 to 100° C.; isolating and collecting dihydroxy-oxotitanium from the heated and stirred suspension of titanium oxyhydroxide precipitate, and washing it with weakly basic aqueous solution; and adding distilled water and 20 to 500 folds of hydrogen peroxide on the basis of 1 mole of Ti4+ in titanium oxyhydroxide to the washed titanium oxyhydroxide, and heat-treating the mixture at a temperature of 90 to 100° C. for 1 to 7 days to prepare titania nanorods having the mean length of 100 nm to 300 nm.Type: ApplicationFiled: May 26, 2009Publication date: November 26, 2009Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Sang Il Seok, In Chan Baek, Jeong Ah Chang
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Patent number: 7611688Abstract: The present invention is related to a process of manufacturing rutile high-purity titania nano sols in a pure aqueous medium having no ionic impurities. In more detail, the present invention is related to a process for manufacturing titania nano sols, in which high-purity rutile titania nano particles are dispersed stably, through the hydrolysis of titanium tetraisopropoxide in an aqueous solution containing hydrogen peroxide (H2O2), and simultaneously with the hydrolysis, formation of peroxotitanate precursors, and hydrothermal treatment of them at 50-120° C.Type: GrantFiled: August 23, 2005Date of Patent: November 3, 2009Assignee: Korea Research Institute of Chemical TechnologyInventors: Sang-Il Seok, Bok-Yeop Ahn, Hoon Kim
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Publication number: 20060110319Abstract: The present invention is related to a process of manufacturing rutile high-purity titania nano sols in a pure aqueous medium having no ionic impurities. In more detail, the present invention is related to a process for manufacturing titania nano sols, in which high-purity rutile titania nano particles are dispersed stably, through the hydrolysis of titanium tetraisopropoxide in an aqueous solution containing hydrogen peroxide (H2O2), and simultaneously with the hydrolysis, formation of peroxotitanate precursors, and hydrothermal treatment of them at 50-120° C.Type: ApplicationFiled: August 23, 2005Publication date: May 25, 2006Inventors: Sang-Il Seok, Bok-Yeop Ahn, Hoon Kim
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Patent number: 6914147Abstract: The present invention relates to polyalkylene oxide porogens having hyper-branches and low dielectric-constant insulators using them. More particularly, the present invention relates to polyalkylene oxide porogens having hyper-branches expressed by the following formula (1), where the polyalkylene oxide porogen has a center molecular (D) having branches (W), and low dielectric-constant insulators having nanopores prepared by coating a mixture of the porogen and a high heat-resistant resin such as polysilsesquioxane and thermal treating the coated substrate at a temperature effective to degrade the porogen.Type: GrantFiled: April 9, 2002Date of Patent: July 5, 2005Assignee: Korea Research Institute of Chemical TechnologyInventors: Changjin Lee, Yongku Kang, Jong Goo Kang, Hee Jung Kim, Moon Young Jin, Sang Il Seok, Kookheon Char, Sang-Hyun Chu
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Patent number: 6855335Abstract: The present invention relates to a process for preparing silica microcapsules and more particularly, to a process for preparing silica microcapsules comprising the steps of dissolving tetraethyl orthosilicate (TEOS) into an aqueous solution containing a hydrolysis catalyst to control a degree of hydrolysis and contribute hydrophilicity or lipophilicity, adding a core material and an appropriate amount of aminopropyltrialkoxysilane(APS) as a gelling agent into the solution, and emulsifying and dispersing the resulting solution to a solution having a polarity opposite to that of the core material to microcapsulate by coating the core material with silica shell via a sol-gel reaction. The process for preparing microcapsules of the present invention reduces environmental pollution compared to conventional processes using an alkali gelling agent such as an ammonia solution, and are suitable for both organic or inorganic core materials having hydrophilic or lipophilic property.Type: GrantFiled: October 7, 2003Date of Patent: February 15, 2005Assignees: Unitech Co., Ltd., Korea Research Institute of Chemical TechnologyInventors: Sang Il Seok, Bok Yeop Ahn
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Publication number: 20040256748Abstract: The present invention relates to a process for preparing silica microcapsules and more particularly, to a process for preparing silica microcapsules comprising the steps of dissolving tetraethyl orthosilicate (TEOS) into an aqueous solution containing a hydrolysis catalyst to control a degree of hydrolysis and contribute hydrophilicity or lipophilicity, adding a core material and an appropriate amount of aminopropyltrialkoxysilane(APS) as a gelling agent into the solution, and emulsifying and dispersing the resulting solution to a solution having a polarity opposite to that of the core material to microcapsulate by coating the core material with silica shell via a sol-gel reaction. The process for preparing microcapsules of the present invention reduces environmental pollution compared to conventional processes using an alkali gelling agent such as an ammonia solution, and are suitable for both organic or inorganic core materials having hydrophilic or lipophilic property.Type: ApplicationFiled: October 7, 2003Publication date: December 23, 2004Applicant: Korea Research Institute Of Chemical Technology and Unitech Co., LtdInventors: Sang Il Seok, Bok Yeop Ahn
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Publication number: 20030078443Abstract: The present invention relates to polyalkylene oxide porogens having hyper-branches and low dielectric-constant insulators using them. More particularly, the present invention relates to polyalkylene oxide porogens having hyper-branches expressed by the following formula (1), where the polyalkylene oxide porogen has a center molecular (D) having branches (W), and low dielectric-constant insulators having nanopores prepared by coating a mixture of the porogen and a high heat-resistant resin such as polysilsesquioxane and thermal treating the coated substrate at a temperature effective to degrade the porogen.Type: ApplicationFiled: April 9, 2002Publication date: April 24, 2003Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Changjin Lee, Yongku Kang, Jong Goo Kang, Hee Jung Kim, Moon Young Jin, Sang Il Seok, Kookheon Char, Sang-Hyun Chu