Abstract:
An apparatus for fabricating IB-IIIA-VIA2 compound semiconductor thin films is provided, including a reaction chamber, a pressure control unit connected with the reaction chamber, a pedestal disposed in the reaction chamber wherein the at least one substrate includes elements of group IB and group IIIA, a first group VIA element supply unit connecting with the reaction chamber for providing vaporized first group VIA elements into the reaction chamber, and a plasma unit disposed in the reaction chamber. In one embodiment, during a reaction in the reaction chamber, the vaporized first group VIA elements flow through the high density plasma region and transform into ionized first group VIA elements, and the ionized first group VIA elements diffuse into the at least one substrate comprising elements of group IB and group IIIA to form a IB-IIIA-VIA2 compound semiconductor thin film thereover.
Abstract:
A carbon nanotube substrate structure including a substrate and a conductive layer disposed thereon. The carbon nanotube layer or the conductive layer has numerous support particles with a diameter smaller than the length of the carbon nanotube of the carbon nanotube layer. The carbon nanotubes, the conductive layer and the support particles are adhered to each other by means of a glue. The carbon nanotubes lean on the support particles, whereby the carbon nanotubes can stand and protrude from the surface of the carbon nanotube layer to serve as field emission sources.
Abstract:
Methods and apparatus for fabricating IB-IIIA-VIA2 compound semiconductor thin films are provided. A method for fabricating IB-IIIA-VIA2 compound semiconductor thin films includes providing a substrate with a precursor film thereover, wherein the precursor film includes elements of group IB and group IIIA. An annealing process is performed on the substrate and the precursor film thereover and forms a group IB-IIIA alloy thin film over the substrate. A surface treatment is performed by transporting ionized group VIA elements to the group IB-IIIA alloy thin film to react therewith to thereby form an IB-IIIA-VIA2 compound semiconductor thin film.
Abstract:
A method for fabricating a copper-indium-gallium-diselenide (CIGS) compound thin film is provided. In this method, a substrate is first provided. An adhesive layer is formed over the substrate. A metal electrode layer is formed over the adhesive layer. A precursor stacked layer is formed over the metal electrode layer, wherein the precursor stacked layer includes a plurality of copper-gallium (CuGa) alloy layers and at least one copper-indium (CuIn) alloy layer sandwiched between the plurality of CuGa alloy layers. An annealing process is performed to convert the precursor stacked layer into a copper-indium-gallium (CuInGa) alloy layer. A selenization process is performed to convert the CuInGa alloy layer into a copper-indium-gallium-diselenide (CuInGaSe) compound thin film.
Abstract:
The invention provides a solar cell. The solar cell has the following structures: a substrate; a first electrode formed on the substrate; a light absorbing layer formed on the first electrode, wherein the light absorbing layer includes a first compound thin film and a second compound thin film, and a band gap of the second compound thin film is larger than that of the first compound thin film; a buffer layer formed on the light absorbing layer; a transparent conducting layer formed on the buffer layer; and a second electrode formed on the transparent conducting layer.