Dhas
Arul Dhas, Sherwood, OR US
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20150354061 | DEFECT CONTROL AND STABILITY OF DC BIAS IN RF PLASMA-BASED SUBSTRATE PROCESSING SYSTEMS USING MOLECULAR REACTIVE PURGE GAS - A substrate processing system comprises an upper electrode and a lower electrode arranged in a processing chamber. A gas delivery system selectively delivers at least one of precursor, one or more deposition carrier gases and a post deposition purge gas. An RF generating system deposits film on the substrate by generating RF plasma in the processing chamber between the upper electrode and the lower electrode by supplying an RF voltage to one of the upper electrode and the lower electrode while the precursor and the one or more deposition carrier gases are delivered by the gas delivery system. A bias generating circuit selectively supplies a DC bias voltage to one of the upper electrode and the lower electrode while the post deposition purge gas is delivered by the gas delivery system. The post deposition purge gas that is delivered by the gas delivery system includes a molecular reactant gas. | 12-10-2015 |
Arul N. Dhas, Sherwood, OR US
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20150203967 | METHOD AND APPARATUS FOR THE REDUCTION OF DEFECTIVITY IN VAPOR DEPOSITED FILMS - The embodiments herein present methods and apparatus for depositing film on substrates. In various cases, a high thermal conductivity gas such as helium is used to deposit a conditioning layer on surfaces of the reaction chamber before it is used to process substrates. The helium may be used to help atomize/vaporize a liquid reactant in a heated injection module before the reactant is delivered to the reaction chamber. In some embodiments, a purge gas including helium is used during a post-deposition purge during deposition on substrates. The disclosed embodiments allow for mixed recipe processing without having to clean the reaction chamber between recipes, and without forming a high number of particles/defects on the substrates. This allows for an improved throughput of high quality film, even where mixed recipes are used in a single reaction chamber. | 07-23-2015 |
Rajiv Mohan Dhas, Chennai IN
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20140318989 | System and method for monitoring and oxygenating an automobile cabin - A system for monitoring and oxygenating an automobile cabin includes at least one oxygen sensor adapted to determine oxygen level inside an automobile cabin, at least one infotainment system adapted to facilitate user of the system to select a required amount of oxygenation with in a preferred range of oxygenation, at least one oxygen producing unit configured to provide oxygen rich air into said automobile cabin and a control device adapted to regulate functioning of all other elements of the system. Further, the control device determines the preferred range of oxygenation based on the oxygen level inside an automobile cabin and regulates functioning of oxygen producing unit to provide the required amount of oxygenation. | 10-30-2014 |
20140323832 | System and Method for non-invasive measurement of bilirubin in newborn and infants - A system for detection of bilirubin content in neonate's skin includes at least one camera configured to capture at least one image of neonate's skin and a reference image, a display system, a communication interface and a control unit configured to control functioning of other elements of the system. The control unit is further configured to detect bilirubin level by comparing image of neonate's skin and reference image. Furthermore, the control unit is configured to transfer said image of neonate's skin to at least one of communication interface and display system. The reference image is a single image acquired from any one of the dermal zones or multiple images from more than one dermal zones of neonate under observation. | 10-30-2014 |
Vivek V. Dhas, Dallas, TX US
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20150144195 | PEROVSKITE AND OTHER SOLAR CELL MATERIALS - Photovoltaic devices such as solar cells, hybrid solar cell-batteries, and other such devices may include an active layer having perovskite material and copper-oxide or other metal-oxide charge transport material. Such charge transport material may be disposed adjacent to the perovskite material such that the two are adjacent and/or in contact. Inclusion of both materials in an active layer of a photovoltaic device may improve device performance. Other materials may be included to further improve device performance, such as, for example: one or more interfacial layers, one or more mesoporous layers, and one or more dyes. | 05-28-2015 |
20150144198 | SOLAR CELL MATERIALS - A photovoltaic cell of improved construction may include an active layer comprising first and second active material, and a dye. Either of the first and second active material may include a copper-oxide compound. The active layer may further include a thin-coat interfacial layer, which may coat at least a portion of either of the first and second active material. The dye may include a primary electron donor moiety, a core moiety, and an electron-withdrawing moiety. | 05-28-2015 |
20150243444 | BI- AND TRI- LAYER INTERFACIAL LAYERS IN PEROVSKITE MATERIAL DEVICES - Photovoltaic devices such as solar cells, hybrid solar cell-batteries, and other such devices may include an active layer disposed between two electrodes. The active layer may have perovskite material and other material such as mesoporous material, interfacial layers, thin-coat interfacial layers, and combinations thereof. The perovskite material may be photoactive. The perovskite material may be disposed between two or more other materials in the photovoltaic device. Inclusion of these materials in various arrangements within an active layer of a photovoltaic device may improve device performance. Other materials may be included to further improve device performance, such as, for example: additional perovskites, and additional interfacial layers. | 08-27-2015 |
20150249172 | TITANATE INTERFACIAL LAYERS IN PEROVSKITE MATERIAL DEVICES - Photovoltaic devices such as solar cells, hybrid solar cell-batteries, and other such devices may include an active layer disposed between two electrodes. The active layer may have perovskite material and other material such as mesoporous material, interfacial layers, thin-coat interfacial layers, and combinations thereof. The perovskite material may be photoactive. The active layer may include a titanate. The perovskite material may be disposed between two or more other materials in the photovoltaic device. Inclusion of these materials in various arrangements within an active layer of a photovoltaic device may improve device performance. Other materials may be included to further improve device performance, such as, for example: additional perovskites, and additional interfacial layers. | 09-03-2015 |
20150318477 | Perovskite Material Layer Processing - A method for processing a perovskite photoactive layer. The method comprises depositing a lead salt precursor onto a substrate to form a lead salt thin film, depositing a second salt precursor onto the lead salt thin film, annealing the substrate to form a perovskite material. | 11-05-2015 |
Vivek V. Dhas, El Paso, TX US
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20140261692 | Tunable Photoactive Compounds - Photoactive compositions of matter, methods for their design and synthesis, and various applications of such compositions of matter are disclosed. Such photoactive compositions may, for example, include any one or more of the following: a core moiety; a primary electron donor moiety; an electron-withdrawing moiety; and an alkyl tail. Some photoactive compositions may further include multiple additional electron donor moieties, electron-withdrawing moieties, and alkyl tails. Applications of such photoactive compositions of matter may include use in photovoltaic cells (e.g., as a p- or n-type material of the active layer of some photovoltaic cells, or as a dye to be employed in other photovoltaic cells); batteries, field-effect transistors; and light-emitting diodes. | 09-18-2014 |
Vivek Vishnu Dhas, Pune IN
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20150040976 | METHOD FOR PREPARING SOLAR PAINT AT ROOM TEMPERATURE FOR DYE SENSITIZED SOLAR CELLS FOR WINDOW PANES AND FLEXIBLE SUBSTRATES - The present invention discloses a room temperature process for the fabrication of dye sensitized solar cells (DSSCs). Particularly, the invention discloses a room temperature process for preparing easily curable, binder free titania based solar paint that gives a high conversion efficiency to be used in fabrication of DSSCs at room temperature. | 02-12-2015 |
Vivek Vishnu Dhas, Pune (maharashtra) IN
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20130034491 | SHAPE PRESERVING CHEMICAL TRANSFORMATION OF ZnO MESOSTRUCTURES INTO ANATASE TiO2 MESOSTRUCTURES FOR OPTOELECTRONIC APPLICATION - The present application discloses a shape preserving chemical transformation of ZnO mesostructures into anatase TiO | 02-07-2013 |
Vivek Vishnu Dhas, Maharashtra IN
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20120012177 | HIGH EFFICIENT DYE-SENSITIZED SOLAR CELLS USING TiO2-MULTIWALLED CARBON NANO TUBE (MWCNT) NANOCOMPOSITE - The invention provides high efficient dye-sensitized solar cells using tio | 01-19-2012 |