Patents by Inventor Shaik Mohammed Zakeeruddin
Shaik Mohammed Zakeeruddin 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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Patent number: 11680035Abstract: The organic small molecule 4,4?,4?,4??-(5,5-dimethoxycyclopenta-1,3-diene-1,2,3,4-tetrayl)tetrakis(N,N-bis(4-methoxyhenyl)aniline (CPDA 1), shows electrochemical properties very close to spiro-OMeTAD indicating a high compatibility with PSC systems for its use as a hole transport material (HTM). The implementation of the cyclopentadiene dimethyl acetale core helps to red shift the absorption onset of the films as well as provide a flexible spatial configuration of the molecule, which is essential for optimum film forming properties. Transient and steady state emission analysis as well as hole mobility measurements indicate that the new HTM allows a better charge extraction, transport and separation than the spiro-OMeTAD reference compound. PSCs based on the new CPDA 1 show a PCE close to 23% with lower hysteresis than its analogue. Stability studies performed under ambient, heated and humid conditions all showed that CPDA 1 is over-performing spiro-OMeTAD.Type: GrantFiled: August 2, 2021Date of Patent: June 20, 2023Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Yuhang Liu, Shaik Mohammed Zakeeruddin, Michael Graetzel, Michael Bauer, Peter Bäuerle
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Patent number: 11594694Abstract: The invention relates to an optoelectronic and/or photoelectrochemical device including a conductive support layer, n-type semiconductor, a sensitizer or light-absorber layer, a hole transporting layer, a spacer layer and a back contact, wherein the n-type semiconductor is in contact with the sensitizer or light-absorber layer, the sensitizer or light-absorber layer includes a perovskite or metal halide perovskite material, the hole transporting layer is in direct contact with the sensitizer or light-absorber layer and includes an inorganic hole transporting material or inorganic p-type semiconductor, the spacer layer is between the hole transporting layer and the back contact and includes a material being different from the inorganic hole transporting material and the material of the back contact.Type: GrantFiled: May 3, 2018Date of Patent: February 28, 2023Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Neha Arora, Mohammad Ibrahim Dar, Shaik Mohammed Zakeeruddin, Michael Graetzel
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Patent number: 11355720Abstract: The present invention relates to a method for producing a solid state solar cell, including the steps of providing a conductive support layer or current collector, applying a metal oxide layer on the conducting support layer, applying at least one sensitizer layer onto the metal oxide layer or onto a first optional layer covering the metal oxide layer, the first optional layer including a charge transporting layer, applying a second optional layer onto the sensitizer layer, the second optional layer being selected from a charge transporting layer, a protective layer, or a combination of both layers, and providing a counter electrode or a metal electrode onto the sensitizer layer or the second optional layer. The at least one sensitizer layer includes an organic-inorganic or metal halide perovskite and is treated by the application of a vacuum before the annealing of the sensitizer.Type: GrantFiled: March 16, 2017Date of Patent: June 7, 2022Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Xiong Li, Chenyi Yi, Dongqin Bi, Shaik Mohammed Zakeeruddin, Michael Graetzel, Anders Hagfeldt
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Publication number: 20220033342Abstract: The organic small molecule 4,4?,4?,4??-(5,5-dimethoxycyclopenta-1,3-diene-1,2,3,4-tetrayl)tetrakis(N,N-bis(4-methoxyhenyl)aniline (CPDA 1), shows electrochemical properties very close to spiro-OMeTAD indicating a high compatibility with PSC systems for its use as a hole transport material (HTM). The implementation of the cyclopentadiene dimethyl acetale core helps to red shift the absorption onset of the films as well as provide a flexible spatial configuration of the molecule, which is essential for optimum film forming properties. Transient and steady state emission analysis as well as hole mobility measurements indicate that the new HTM allows a better charge extraction, transport and separation than the spiro-OMeTAD reference compound. PSCs based on the new CPDA 1 show a PCE close to 23% with lower hysteresis than its analogue. Stability studies performed under ambient, heated and humid conditions all showed that CPDA 1 is over-performing spiro-OMeTAD.Type: ApplicationFiled: August 2, 2021Publication date: February 3, 2022Inventors: Yuhang Liu, Shaik Mohammed Zakeeruddin, Michael Graetzel, Michael Bauer, Peter Bäuerle
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Patent number: 11195959Abstract: A perovskite material including an organic-inorganic perovskite structure of formula (I), AnMX3 (I), n being the number of cation A and an integer >4, A being a monovalent cation selected from inorganic cations Ai and/or from organic cations Ao, M being a divalent metal cation or a combination thereof, X being a halide and/or pseudohalide anion or a combination thereof, wherein at least one cation A is selected from organic cations Ao, the inorganic cations Ai are independently selected from Li+, Na+, K+, Rb+, Cs+, or Tl+ and the organic cations Ao are independently selected from ammonium (NH4+), methyl ammonium (MA) (CH3NH3+), ethyl ammonium (CH3CH2NH3)+, formamidinium (FA) (CH(NH2)2+), methylformamidinium (CH3C(NH2)2+), guanidium (C((NH)2)3+), tetramethylammonium ((CH3)4N+), dimethylammonium ((CH3)2NH2+) or trimethylammonium ((CH3)3NH+).Type: GrantFiled: July 3, 2017Date of Patent: December 7, 2021Assignees: Ecole Polytechnique Federale de Lausanne (EPFL), Panasonic CorporationInventors: Michael Saliba, Taisuke Matsui, Konrad Domanski, Jiyoun Seo, Shaik Mohammed Zakeeruddin, Wolfgang Richard Tress, Michael Graetzel
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Patent number: 11177440Abstract: The present invention provides a method for depositing an organic-inorganic perovskite, the method comprising the step of depositing a perovskite precursor solution comprising one or more organic cation, wherein said precursor solution preferably deposited by inkjet printing. The method is particularly useful in the manufacture of perovskite solar cells. For depositing the perovskite, a perovskite precursor solution or ink is preferably used, which comprises an organic cation carrying an anchoring group, such as 5-ammonium valeric acid. Surprisingly, the presence of the latter compound renders the precursor solutions stable and suitable for inkjet printing.Type: GrantFiled: August 2, 2017Date of Patent: November 16, 2021Assignees: AALTO UNIVERSITY FOUNDATION, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL), SOLARONIX S.AInventors: Syed Ghufran Hashmi, Merve Ozkan, David Martineau, Xiong Li, Shaik Mohammed Zakeeruddin, Michael Graetzel
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Publication number: 20210249196Abstract: An organometallic perovskite solar cell and manufacturing process, in particular a solar cell having a lead or tin organometallic photon absorber layer. The organometallic solar cell includes an absorber layer containing a compound which crystallizes in the perovskite crystal lattice and which includes a lithium-free hole conductor layer.Type: ApplicationFiled: July 8, 2019Publication date: August 12, 2021Applicant: Siemens Energy Global GmbH & Co. KGInventors: Seckin Akin, Maximilian Fleischer, Michael Grätzel, Hui-Seon Kim, Jiyoun Seo, Elfriede Simon, Shaik Mohammed Zakeeruddin
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Publication number: 20210054288Abstract: This invention relates to an optoelectronic and/or photovoltaic device comprising a compound used as crystal defect mitigating agent or passivating agent, the compound being selected from a compound of formula (I), a compound of formula (II), a mixture thereof, or a compound of formula (II) being selected from anyone of the disclosed formulae (III.1), (III.2), (II.3), (III4) and (III.5).Type: ApplicationFiled: January 21, 2019Publication date: February 25, 2021Inventors: Mohammad Madi Tavakoli, Yuhang Liu, Shaik Mohammed Zakeeruddin, Michael Graetzel
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Publication number: 20200388442Abstract: The present invention relates to an optoelectronic device including an electron transport layer (ETL) and a light harvesting layer, wherein the light harvesting layer includes a metal halide perovskite and is provided on the ETL being a multilayer structure having at least two layers of metal oxide, at least one layer of which includes a crystalline mesoporous metal oxide and at least one layer of which includes an amorphous metal oxide or metal oxide nanocrystals, and wherein the layer being in contact with the light harvesting layer includes the amorphous metal oxide or the metal oxide nanocrystals and is provided on the layer including the crystalline mesoporous metal oxide.Type: ApplicationFiled: December 14, 2018Publication date: December 10, 2020Inventors: Mohammad Madi Tavakoli, Shaik Mohammed Zakeeruddin, Michael Graetzel
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Publication number: 20200111981Abstract: The invention relates to an optoelectronic and/or photoelectrochemical device including a conductive support layer, n-type semiconductor, a sensitizer or light-absorber layer, a hole transporting layer, a spacer layer and a back contact, wherein the n-type semiconductor is in contact with the sensitizer or light-absorber layer, the sensitizer or light-absorber layer includes a perovskite or metal halide perovskite material, the hole transporting layer is in direct contact with the sensitizer or light-absorber layer and includes an inorganic hole transporting material or inorganic p-type semiconductor, the spacer layer is between the hole transporting layer and the back contact and includes a material being different from the inorganic hole transporting material and the material of the back contact.Type: ApplicationFiled: May 3, 2018Publication date: April 9, 2020Inventors: Neha Arora, Mohammad Ibrahim Dar, Shaik Mohammed Zakeeruddin, Michael Graetzel
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Publication number: 20200028081Abstract: The present invention provides a method for depositing an organic-inorganic perovskite, the method comprising the step of depositing a perovskite precursor solution comprising one or more organic cation, wherein said precursor solution preferably deposited by inkjet printing. The method is particularly useful in the manufacture of perovskite solar cells. For depositing the perovskite, a perovskite precursor solution or ink is preferably used, which comprises an organic cation carrying an anchoring group, such as 5-ammonium valeric acid. Surprisingly, the presence of the latter compound renders the precursor solutions stable and suitable for inkjet printing.Type: ApplicationFiled: August 2, 2017Publication date: January 23, 2020Inventors: Syed Ghufran Hashmi, Merve Ozkan, David Martineau, Xiong Li, Shaik Mohammed Zakeeruddin, Michael Graetzel
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Patent number: 10488879Abstract: A photovoltaic system including a solar cell having a hysteretic behavior; and a power device configured to extract a maximum power from the solar cell by forcing power oscillations of the power output by the solar cell.Type: GrantFiled: March 8, 2018Date of Patent: November 26, 2019Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Norman Pellet, Fabrizio Giordano, Shaik Mohammed Zakeeruddin, Michael Grätzel
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Publication number: 20190312155Abstract: A perovskite material including an organic-inorganic perovskite structure of formula (I), AnMX3 (I), n being the number of cation A and an integer >4, A being a monovalent cation selected from inorganic cations Ai and/or from organic cations Ao, M being a divalent metal cation or a combination thereof, X being a halide and/or pseudohalide anion or a combination thereof, wherein at least one cation A is selected from organic cations Ao, the inorganic cations Ai are independently selected from Li+, Na+, K+, Rb30, Cs+, or Tl+ and the organic cations Ao are independently selected from ammonium (NH4+), methyl ammonium (MA) (CH3NH3+), ethyl ammonium (CH3CH2NH3)+, formamidinium (FA) (CH(NH2)2+), methylformamidinium (CH3C(NH2)2+), guanidium (C((NH)2)3+), tetramethylammonium ((CH3)4N+), dimethylammonium ((CH3)2NH230) or trimethylammonium ((CH3)3NH+).Type: ApplicationFiled: July 3, 2017Publication date: October 10, 2019Inventors: Michael Saliba, Taisuke Matsui, Konrad Domanski, Jiyoun Seo, Shaik Mohammed Zakeeruddin, Wolfgang Richard Tress, Michael Graetzel
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Publication number: 20190044080Abstract: The present invention relates to a method for producing a solid state solar cell, including the steps of providing a conductive support layer or current collector, applying a metal oxide layer on the conducting support layer, applying at least one sensitizer layer onto the metal oxide layer or onto a first optional layer covering the metal oxide layer, the first optional layer including a charge transporting layer, applying a second optional layer onto the sensitizer layer, the second optional layer being selected from a charge transporting layer, a protective layer, or a combination of both layers, and providing a counter electrode or a metal electrode onto the sensitizer layer or the second optional layer. The at least one sensitizer layer includes an organic-inorganic or metal halide perovskite and is treated by the application of a vacuum before the annealing of the sensitizer.Type: ApplicationFiled: March 16, 2017Publication date: February 7, 2019Inventors: Xiong Li, Chenyi Yi, Dongqin Bi, Shaik Mohammed Zakeeruddin, Michael Graetzel, Anders Hagfeldt
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Publication number: 20180259990Abstract: A photovoltaic system including a solar cell having a hysteretic behavior; and a power device configured to extract a maximum power from the solar cell by forcing power oscillations of the power output by the solar cell.Type: ApplicationFiled: March 8, 2018Publication date: September 13, 2018Inventors: Norman Pellet, Fabrizio Giordano, Shaik Mohammed Zakeeruddin, Michael Grätzel
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Patent number: 10038150Abstract: The invention relates to electrochemical devices comprising complexes of cobalt comprising at least one ligand with a 5- or six membered, N-containing heteroring. The complex are useful as p- and n-dopants, as over of electrochemical devices, in particular in organic semiconductors. The complexes are further useful as over-discharge prevention and overvoltage protection agents.Type: GrantFiled: April 14, 2016Date of Patent: July 31, 2018Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Julian Burschka, Florian Kessler, Etienne Baranoff, Mohammad Khaja Nazeeruddin, Michael Graetzel, Shaik Mohammed Zakeeruddin, Anders Hagfeldt, Marina Freitag, Fabrizio Giordano
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Publication number: 20160351342Abstract: The present invention relates to a compound of formula (I) based on compound derived from Acceptor-Donor-Acceptor (A-D-A) oligothiophenes based on heteroacene core and used as hole transporting material in a photovoltaic device, in particular in a solid state solar cell.Type: ApplicationFiled: January 27, 2015Publication date: December 1, 2016Inventors: Shaik Mohammed Zakeeruddin, Michael Graetzel, Mohammad Khaja Nazeeruddin, Peng Qin, Amaresh Mishra, Hannelore Kast, Peter Bauerle
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Patent number: 8097361Abstract: This invention concerns a novel method for surface derivatization of electrode materials for Li-ion batteries. The derivatization is based on adsorption of a composite assembly consisting of amphiphilic redox active molecule attached to single walled carbon nanotube (SWCNT). Its role consists in the enhancement of electronic conductivity of electrode materials, such as phosphate olivines, without requesting any significant increase of the electrode volume and mass. The SWCNT is linked to the redox molecule via non-covalent or covalent interaction with the hydrophobic part of the molecule or electrostatic interaction. The hydrophilic part of the molecule serves as the anchoring site for surface modification of the electrode active material. The redox potential of the molecule is close to the redox potential of the electrode active material. The adsorbed assembly of redox-molecule & SWCNT thus improves the charge transfer from a current collector to the electrode active material.Type: GrantFiled: October 18, 2007Date of Patent: January 17, 2012Assignee: Dow Global Technologies LLCInventors: Ivan Exnar, Shaik Mohammed Zakeeruddin, Michael Gratzel, Ladislav Kavan
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Publication number: 20100068621Abstract: This invention concerns a novel method for surface derivatization of electrode materials for Li-ion batteries. The derivatization is based on adsorption of a composite assembly consisting of amphiphilic redox active molecule attached to single walled carbon nanotube (SWCNT). Its role consists in the enhancement of electronic conductivity of electrode materials, such as phosphate olivines, without requesting any significant increase of the electrode volume and mass. The SWCNT is linked to the redox molecule via non-covalent or covalent interaction with the hydrophobic part of the molecule or electrostatic interaction. The hydrophilic part of the molecule serves as the anchoring site for surface modification of the electrode active material. The redox potential of the molecule is close to the redox potential of the electrode active material. The adsorbed assembly of redox-molecule & SWCNT thus improves the charge transfer from a current collector to the electrode active material.Type: ApplicationFiled: October 18, 2007Publication date: March 18, 2010Inventors: Ivan Exnar, Shaik Mohammed Zakeeruddin, Michael Gratzel, Ladislav Kavan
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Publication number: 20090176162Abstract: This invention concerns a lithium rechargeable electrochemical cell containing electrochemical redox active compounds in the electrolyte. The cell is composed of two compartments, where the cathodic compartment comprises a cathodic lithium insertion material and one or more of p-type redox active compound(s) in the electrolyte; the anodic compartment comprises an anodic lithium insertion material and one or more of n-type redox active compound(s) in the electrolyte. These two compartments are separated by a separator and the redox active compounds are confined only in each compartment. Such a rechargeable electrochemical cell is suitable for high energy density applications. The present invention also concerns the general use of redox active compounds and electrochemically addressable electrode systems containing similar components which are suitable for use in the electrochemical cell.Type: ApplicationFiled: April 6, 2007Publication date: July 9, 2009Inventors: Ivan Exnar, Qing Wang, Michael Gratzel, Shaik Mohammed Zakeeruddin, Ladislav Kavan