King Fahd University of Petroleum and Minerals

Trinity College Dublin

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Qatar Foundation for Education, Science and Community Development

Qatar Foundation

Nouar Tabet

Mohammad Kamal Hossain

Qasem Ahmed Drmosh

Stefano Sanvito

Heesoo Park

Fadwa El-Mellouhi

Fahhad Hussain Alharbi

Zain Hassan Yamani

Syed Ahmed Ali

Yann Leconte

Axelle Quinsac

Frederic Schuster

Cesium-niobium-chalcogenide compounds and a semiconductor device are provided. The cesium-niobium-chalcogenide compound is selected from the group consisting of CsNbS, CsNbSe, and CsNbOQ, where Q is S or Se, and x is 1 or 2, and includes an edge-shared orthorhombic crystal structure. In one embodiment, the semiconductor device includes a cathode layer, an anode layer, and an active layer disposed between the cathode layer and the anode layer, and the active layer includes the cesium-niobium-chalcogenide compound.

Cesium-niobium-chalcogenide compounds and semiconductor devices including the same

Photovoltaic perovskite oxychalcogenide material and an optoelectronic device are provided. The optoelectronic device includes a cathode layer, an anode layer, and an active layer disposed between the cathode layer and the anode layer. In one embodiment, the active layer includes a perovskite oxychalcogenide compound and the perovskite oxychalcogenide compound is NaMOQ, wherein M is Nb or Ta, and Q is S, Se or Te.

Photovoltaic perovskite oxychalcogenide material and optoelectronic devices including the same

A process for producing an unsupported molybdenum sulfide nanocatalyst comprising atomizing a molybdenum oxide solution to form a molybdenum oxide aerosol, pyrolyzing the molybdenum oxide aerosol with a laser beam to form the unsupported molybdenum-based nanocatalyst, and pre-sulfiding at least a portion of the unsupported molybdenum-based nanocatalyst to form an unsupported molybdenum sulfide nanocatalyst, wherein the unsupported molybdenum-based nanocatalyst, the unsupported molybdenum sulfide catalyst or both are in the form of nanoparticles with a diameter of 1-10 nm and in a distorted rutile crystalline structure. A method of selective deep hydrodesulfurization whereby a hydrocarbon feedstock having at least one sulfur-containing component and at least one hydrocarbon is contacted with the unsupported molybdenum sulfide nanocatalyst.

Process for selective deep hydrodesulfurization of a hydrocarbon feedstock using an unsupported nanocatalyst made by laser pyrolysis

A method of preparing silver nanoparticles, including silver nanorings. A zinc oxide thin film is formed initially by direct-current sputtering of a zinc target onto a substrate. A silver thin film is then formed by a similar sputtering technique, of a silver target onto the zinc oxide thin film. After that, the silver thin film is subject to an annealing treatment. The temperature, duration and atmosphere of the annealing treatment can be varied to control the average particle size, average distance between particles (density), particle size distribution of the silver nanoparticles. In at least one embodiment, silver nanoparticles of ring structure are produced.

Silver nanoparticle method on zinc oxide films

Method of preparing silver nanoparticles and silver nanorings

Growing community of inventors

Doha, Qatar

Nouar Tabet