Patents by Inventor Shaik Mohammad Zakeeruddin
Shaik Mohammad 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: 10515767Abstract: The invention discloses a perovskite solar cell and a method of fabrication thereof. The perovskite solar cell sequentially comprises a transparent electrode, a mesoporous P-I-N framework and a counter electrode from the bottom to top; the mesoporous P-I-N framework is composed of an n-type semiconductor layer, an insulating layer, and a p-type semiconductor layer in a sequentially stacked mode, and the n-type semiconductor layer, the insulating layer and the p-type semiconductor layer all comprise mesopores filled with a perovskite material. The preparation method sequentially includes preparing the mesoporous P-I-N framework on a transparent conductive substrate through a spin-coating method or a screen printing method, filling with the perovskite material and preparing the counter electrode layer.Type: GrantFiled: July 24, 2015Date of Patent: December 24, 2019Assignees: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL), HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Mingkui Wang, Kun Cao, Jin Cui, Zhixiang Zuo, Yan Shen, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Patent number: 9812658Abstract: The present invention relates to compounds of formula (I) based on a porphyrin core and a ?-conjugated linker or acceptor introduced between the porphyrin core and an anchoring group having a high absorption coefficient covering the whole UV-Visible and near-infrared spectral response, and their use as sensitizer or dye and an electrochemical or optoelectronic device including a compound of the invention.Type: GrantFiled: December 4, 2014Date of Patent: November 7, 2017Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Chenyi Yi, Fabrizio Giordano, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Patent number: 9779879Abstract: The present invention provides an improved redox couple for electrochemical and optoelectronic devices. The redox couple is based on a complex of a first row transition metal, said complex containing at least one mono-, bi-, or tridentate ligand comprising a substituted or unsubstituted ring or ring system comprising a five-membered N-containing heteroring and/or a six-membered ring comprising at least two heteroatoms, at least one of which being a nitrogen atom, said five- or six-membered heteroring, respectively, comprising at least one double bond. The invention also relates to electrolytes and to the devices containing the complex, and to the use of the complex as a redox couple. The invention further provides electrochemical and/or optoelectronic devices comprising a first and a second electrode and, between said first and second electrode, a charge transport layer, said a charge transport layer comprising tetracyanoborate ([B(CN)4]?) and a cationic metal complex functioning as redox-couple.Type: GrantFiled: February 24, 2012Date of Patent: October 3, 2017Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Mohammad Khaja Nazeeruddin, Michael Graetzel, Etienne Baranoff, Florian Kessler, Jun-Ho Yum, Aswani Yella, Hoi Nok Tsao, Shaik Mohammad Zakeeruddin
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Publication number: 20170213651Abstract: The invention discloses a perovskite solar cell and a method of fabrication thereof. The perovskite solar cell sequentially comprises a transparent electrode, a mesoporous P-I-N framework and a counter electrode from the bottom to top; the mesoporous P-I-N framework is composed of an n-type semiconductor layer, an insulating layer, and a p-type semiconductor layer in a sequentially stacked mode, and the n-type semiconductor layer, the insulating layer and the p-type semiconductor layer all comprise mesopores filled with a perovskite material. The preparation method sequentially includes preparing the mesoporous P-I-N framework on a transparent conductive substrate through a spin-coating method or a screen printing method, filling with the perovskite material and preparing the counter electrode layer.Type: ApplicationFiled: July 24, 2015Publication date: July 27, 2017Inventors: Mingkui WANG, Kun CAO, Jin CUI, Zhixiang ZUO, Yan SHEN, Shaik Mohammad ZAKEERUDDIN, Michael GRAETZEL
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Patent number: 9716240Abstract: The present invention relates to novel compounds that are useful as ligands in organometallic dyes. More particularly, the invention relates to dyes comprising the compounds, said dyes being sensitizing dyes useful in solar cell technology. According to an embodiment, the present invention discloses new ruthenium dyes and their application in dye-sensitized solar cells (DSC). The referred ruthenium dyes with new structural features can be easily synthesized, show more than 85% light-to-electricity conversion efficiency and a higher than 9% cell efficiency.Type: GrantFiled: February 27, 2009Date of Patent: July 25, 2017Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Feifei Gao, Yuan Wang, Jing Zhang, Peng Wang, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Publication number: 20170162811Abstract: The present invention relates to a solid state photovoltaic device including an absorbing layer containing a light harvester and at least one templating agent, with the absorbing layer being prepared in a single step.Type: ApplicationFiled: July 3, 2015Publication date: June 8, 2017Inventors: Xiong LI, Shaik Mohammad ZAKEERUDDIN, Michael GRAETZEL
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Publication number: 20160308150Abstract: The present invention relates to compounds of formula (I) based on a porphyrin core and a ?-conjugated linker or acceptor introduced between the porphyrin core and an anchoring group having a high absorption coefficient covering the whole UV-Visible and near-infrared spectral response, and their use as sensitizer or dye and an electrochemical or optoelectronic device including a compound of the invention.Type: ApplicationFiled: December 4, 2014Publication date: October 20, 2016Applicant: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Chenyi Yi, Fabrizio Giordano, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Patent number: 9460861Abstract: The present invention relates to modified surfaces. The surfaces comprise an inorganic material on which a phosphinic acid derivative is adsorbed. The phosphinic acid thus turns out to be a new anchoring group useful for surface derivatization. The invention has many applications for photoelectric conversion devices, batteries, capacitors, electrochromic displays, chemical sensors, biological sensors, light emitting diodes, electrodes, semiconductors, separation membranes, selective adsorbents, adsorbents for HPLC, catalysts, implants, nanoparticles, antiadhesives, and anticorrosion coatings, for example.Type: GrantFiled: June 30, 2014Date of Patent: October 4, 2016Assignee: Ecole Polytechnique Federale De Lausanne (EPFL)Inventors: Shaik Mohammad Zakeeruddin, Peter Pechy, Michael Graetzel
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Publication number: 20160233439Abstract: 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: ApplicationFiled: April 14, 2016Publication date: August 11, 2016Inventors: Julian Burschka, Florian Kessler, Etienne Baranoff, Mohammad Khaja Nazeeruddin, Michael Graetzel, Shaik Mohammad Zakeeruddin, Anders Hagfeldt, Marina Freitag, Fabrizio Giordano
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Patent number: 9396882Abstract: The present invention refers to using the principal of a room temperature molten ionic liquid, to an electrolyte, to devices comprising the ionic liquid co-melting, and to the preparation of a room temperature ionic liquid via various physical and chemical methods. The room temperature molten ionic liquid comprises at least two component salts, at least one of which is not molten at room temperature, but, if combined with another salt, is in the molten state at room temperature.Type: GrantFiled: December 12, 2013Date of Patent: July 19, 2016Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Zing Zhang, Chengcheng Xi, Yiming Cao, Feifei Gao, Peng Wang, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Patent number: 9337435Abstract: A dye sensitized solar cell, wherein a compacting compound whose molecular structure comprises a terminal group, a hydrophobic part and an anchoring group is co-adsorbed together with the dye on the semi-conductive metal oxide layer of the photoanode, forming a dense mixed self-assembled monolayer.Type: GrantFiled: April 29, 2004Date of Patent: May 10, 2016Assignee: Ecole Polytechnique Federal de Lausanne (EPFL)Inventors: Peng Wang, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Publication number: 20140311575Abstract: The present invention relates to modified surfaces. The surfaces comprise an inorganic material on which a phosphinic acid derivative is adsorbed. The phosphinic acid thus turns out to be a new anchoring group useful for surface derivatisation. The invention has many applications for photoelectric conversion devices, batteries, capacitors, electrochromic displays, chemical sensors, biological sensors, light emitting diodes, electrodes, semiconductors, separation membranes, selective adsorbents, adsorbents for HPLC, catalysts, implants, nanoparticles, antiadhesives, and anticorrosion coatings, for example.Type: ApplicationFiled: June 30, 2014Publication date: October 23, 2014Inventors: Shaik Mohammad Zakeeruddin, Peter Pechy, Michael Graetzel
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Patent number: 8847065Abstract: The present invention relates to modified surfaces. The surfaces comprise an inorganic material on which a phosphinic acid derivative is adsorbed. The phosphinic acid thus turns out to be a new anchoring group useful for surface derivatization. The invention has many applications for photoelectric conversion devices, batteries, capacitors, electrochromic displays, chemical sensors, biological sensors, light emitting diodes, electrodes, semiconductors, separation membranes, selective adsorbents, adsorbents for HPLC, catalysts, implants, nanoparticles, antiadhesives, and anticorrosion coatings, for example.Type: GrantFiled: March 19, 2010Date of Patent: September 30, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Shaik Mohammad Zakeeruddin, Péter Péchy, Michael Graetzel
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Publication number: 20140097376Abstract: The present invention refers to using the principal of a room temperature molten ionic liquid, to an electrolyte, to devices comprising the ionic liquid co-melting, and to the preparation of a room temperature ionic liquid via various physical and chemical methods. The room temperature molten ionic liquid comprises at least two component salts, at least one of which is not molten at room temperature, but, if combined with another salt, is in the molten state at room temperature.Type: ApplicationFiled: December 12, 2013Publication date: April 10, 2014Applicant: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Jing Zhang, Chengcheng Xi, Yiming Cao, Feifei Gao, Peng Wang, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Patent number: 8686285Abstract: The present invention refers to using the principal of a room temperature molten ionic liquid, to an electrolyte, to devices comprising the ionic liquid co-melting, and to the preparation of a room temperature ionic liquid via various physical and chemical methods. The room temperature molten ionic liquid comprises at least two component salts, at least one of which is not molten at room temperature, but, if combined with another salt, is in the molten state at room temperature.Type: GrantFiled: December 23, 2008Date of Patent: April 1, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Jing Zhang, Chengcheng Xi, Yiming Cao, Feifei Gao, Peng Wang, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Publication number: 20140060641Abstract: The present invention provides an improved redox couple for electrochemical and optoelectronic devices. The redox couple is based on a complex of a first row transition metal, said complex containing at least one mono-, bi-, or tridentate ligand comprising a substituted or unsubstituted ring or ring system comprising a five-membered N-containing heteroring and/or a six-membered ring comprising at least two heteroatoms, at least one of which being a nitrogen atom, said five- or six-membered heteroring, respectively, comprising at least one double bond. The invention also relates to electrolytes and to the devices containing the complex, and to the use of the complex as a redox couple. The invention further provides electrochemical and/or optoelectronic devices comprising a first and a second electrode and, between said first and second electrode, a charge transport layer, said a charge transport layer comprising tetracyanoborate ([B(CN)4]?) and a cationic metal complex functioning as redox-couple.Type: ApplicationFiled: February 24, 2012Publication date: March 6, 2014Applicant: Ecole Polytechnique Federale de LausanneInventors: Mohammad Khaja Nazeeruddin, Michael Graetzel, Etienne Baranoff, Florian Kessler, Jun-Ho Yum, Aswani Yella, Hoi Nok Tsao, Shaik Mohammad Zakeeruddin
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Patent number: 8487119Abstract: The present invention relates to new organic sensitizer compounds and to photoelectric conversion devices, in particular dye-sensitised solar cells comprising the new sensitizers. The present invention also relates to flexible photoelectric conversion devices, which are based on ionic liquid electrolytes or organic charge transporting materials.Type: GrantFiled: February 3, 2009Date of Patent: July 16, 2013Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Mingfei Xu, Hao Qin, Feifei Gao, Peng Wang, Shaik Mohammad Zakeeruddin, Michael Graetzel
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Patent number: 8440843Abstract: A dye sensitized solar cell, comprising a heteroleptic polypyridil complex of Ru, Os or Fe. The donating ligand has an extended conjugated ?-system increasing the light absorbance and keeing the LUMO energy level higher than that of the anchoring ligand. A compacting compound whose molecular structure comprises a terminal group, a hydrophobic part and an anchoring group may be co-adsorbed together with the dye on the semi-conductive metal oxide layer of the photoanode, forming a dense mixed self-assembled monolayer.Type: GrantFiled: April 7, 2011Date of Patent: May 14, 2013Assignee: Ecole Polytechnique Fédérale de LausanneInventors: Shaik Mohammad Zakeeruddin, Cêdric Klein, Peng Wang, Michael Graetzel
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Patent number: 8114318Abstract: The present invention relates to electrolytes comprising tetracyanoborate and an organic cation as components of electrolytes in electrochemical and/or optoelectronic devices, in particular solar cells. This ionic liquid has low viscosity and can be used as electrolyte in the absence of a solvent. Importantly, the ionic liquid remains stable in solar cells even after prolonged thermal stress at 80° C. for 1000 hours. Photovoltaic conversion efficiency remained stable and keeping more than 90% of the initial value.Type: GrantFiled: February 13, 2007Date of Patent: February 14, 2012Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Daibin Kuang, Peng Wang, Shaik Mohammad Zakeeruddin, Michaël Graetzel
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Patent number: 8105865Abstract: The present invention relates to optoelectronic and/or electrochemical devices comprising an organic charge transporting material which is liquid at a temperature of ?180° C. In particular in dye-sensitised solar cells, quantum efficiency higher than with prior art solid organic hole-transporters is reported. The melting point of a large quantity of organic charge transporting materials may be adjusted to a desired value by selecting suitable substituents. Accordingly, general advantages of the liquid state may be associated with the properties of organic charge transporting materials.Type: GrantFiled: March 21, 2007Date of Patent: January 31, 2012Assignee: Ecole Polytechnique Fédérale de Lausanne (EPFL)Inventors: Henry J. Snaith, Shaik Mohammad Zakeeruddin, Michael Graetzel