King Abdulaziz University

King Khalid University

King Khalid University, Rcams

Firat Universitesi Rektorlugu

Fahrettin Yakuphanoglu

Ahmed A Al-Ghamdi

Yusuf Abdulaziz Al-Turki

Abdullah G Al-Sehemi

Aysegul Dere

Abul Kalam

Farid El-Tantawy

Wageh Swelm

Mehboobali Pannipara

Faten Ebrahim S Al-Hazmi

Mohammed A Assiri

Richard O Ocaya

The present disclosure provides a thin-film sensor including a top layer passivation including top electrical contacts; an active layer disposed under the top layer, the active layer including an active material; a bottom layer passivation disposed below the active layer and including bottom electrical contacts; and a semiconductor layer disposed around the active layer, such that the semiconducting layer sandwiches the active layer.

Thin-film sensor and method of fabricating thin-film sensor

In the present disclosure, a p-n organic battery comprising a p-type organic semiconductor and n-type organic semiconductor as active electrodes, anode and cathode current electrodes, separator and electrolyte and a method of fabricating the same is disclosed. The p-n organic battery has an p-type organic semiconductor separated from a n type organic semiconductor by an aqueous electrolyte solution, contained in an insulating vessel with suitable terminals (not shown) being provided in electric contact with the anode current electrode and the cathode current electrode. The aqueous electrolyte can comprise water, and a transition metal salt such as NiCl, CuCldissolved in the water.

P-N organic battery, a method of fabricating the battery thereof

An organic light emitting diode analyzer is provided to test electrical and spectroscopic characteristics organic light emitting diodes (OLED). The analyzer includes a spectrometer, a luminance and color meter, a header of the luminance and color meter, an OLED a source meter, an OLED holder and a computer. The OLED analyzer is a characterization system to measure the electrical and spectral characteristics and feature of the OLED. The luminance and color meter includes a color sensor, and the luminance and color meter measures a luminance of the OLED, a color temperature of the OLED, and color coordinates of the OLED. The spectrometer measures a wavelength of the OLED, an irradiance, a color index, the color temperature, color coordinates and the irradiance (W/m&#xb7;nm). The source meter applies positive voltages to the OLED, and the source meter measures a current through the OLED.

Organic light emitting diode analyzer

A conductive nanocomposite which contains a mixed polymer matrix which contains a rubber and a polyether, carbon nanoparticles, and transition metal nanoparticles. The conductive nanocomposite has a nonlinear relationship between resistivity and temperature characterized by an exponential increase reaching a peak resistivity followed by an exponential decrease as temperature increases. Also disclosed is a method of forming the conductive nanocomposite involving mixing the components, aging, and pressing. The conductive nanocomposite forms a component of a heater that is self-regulating as a result of the nonlinear relationship between resistivity and temperature of the conductive nanocomposite. The nanocomposite also forms a component of a thermistor.

Elastomeric iron/graphene nanocomposite

Method for making an elastomeric conductive nanocomposite

A photomemcapacitor device comprising a metal oxide semiconductor material is provided. The photocapacitor device comprises a p-n junction and a Schottky junction. A photomemcapacitor is provided for responding to photons at specified wavelengths.

Photomemcapacitor and method for the production thereof

Conductive nanocomposite having a dual temperature coefficient of resistance and a method of preparing

A hybrid junction solar light sensitive photodiode includes at least one inorganic p-n junction and at least one organic semiconductor p-n junction (pnpn) in series. The photoresponse properties of the photodiode is controlled using an inorganic layer and an organic layer. The photoactive layer is an organic semiconducting material having a mobility higher than 0.5 cm/Vs. The metal oxide layer is an oxide semiconductor comprising of ternary oxides.

Hybrid junction solar light sensitive device

A photodiode comprising a photoactive spinel oxide layer is described. This photoactive spinel oxide layer forms a contact with both a light absorption layer of quantum dots, quantum wires, or quantum rods, and an inorganic substrate layer. In some embodiments, the inorganic substrate layer and the photoactive spinel oxide layer form an isotype junction. Methods of characterizing the photodiode are provided and demonstrate commercially relevant electrical and optoelectronic properties, particularly the ability to operate as a photodetector with a high photosensitivity. An economical process for preparing the photodiode is provided as well as applications.

Photodiode having quantum dot light absorption layer

Photodiode having an aluminum metal ohmic contact and a spinel oxide layer

Photodiode with spinel oxide photoactive layer

A solar simulator filter that includes a flexible substrate and one or more layers of oxide materials, e.g. fluorine-doped tin oxide and indium-doped tin oxide, wherein a thickness of said layers is no more than 500 nm, and wherein the solar simulator filter generates a spectral output that closely matches a solar irradiance spectrum. Various embodiments of the solar simulator filter and a method of fabricating thereof is described.

Solar simulator filter and a method of fabricating thereof

A composition of graphene oxide free-standing film, a method of making the film, and a method of using the film to shield electromagnetic radiation particularly at microwave frequencies from 1 GHz to 12 GHz. The composition comprises stacked layers of graphene oxide nanosheets oriented parallel to the film surface and stacked layers of graphene oxide nanosheets oriented perpendicular to the film surface. The method of making the composition includes forming graphene oxide by arc-discharge between graphite electrodes in the presence of oxygen gas to form a graphene oxide soot, suspending the graphene oxide soot in water to form a colloid, depositing the colloid onto a substrate to form a wet paper, and drying the wet paper to form the film. The method of using the composition to shield electromagnetic radiation includes enclosing and/or encapsulating an electromagnetic radiation generating source with the free-standing film to shield electromagnetic radiation.

Graphene oxide free-standing film and methods for shielding electromagnetic radiation at microwave frequencies

A variable capacitor device that includes a dielectric layer comprising a shape-memory polymer, a first metal plate and a second metal plate, wherein the dielectric layer is sandwiched between the first and the second metal plates. The shape-memory polymer has a first thickness at a first temperature under a first external compressive load, a second thickness at a second temperature under a second external compressive load, wherein the first thickness is greater than the second thickness, the second temperature is greater than the first temperature, and the second external compressive load is greater than the first external compressive load. The shape memory polymer having the second thickness is configured to convert to the shape-memory polymer having the first thickness when sequentially subjected to the first external compressive load and the second temperature.

Tunable shape memory capacitor and a method of preparation thereof

A graphene oxide based electrochemical cell and a battery containing a plurality of electrochemical cells, at least one of which is the graphene oxide based electrochemical cell. The graphene oxide based electrochemical cell includes an aqueous electrolyte solution, an anode and a cathode contained in a vessel, wherein the aqueous electrolyte solution includes water, graphene oxide nanosheets and CuCldissolved in the water.

Growing community of inventors

Elazig, Turkey

Fahrettin Yakuphanoglu