Abstract: The present invention relates to a method for manufacturing silicon thin-film solar cells, including: providing a substrate; forming a first electrode on the substrate; forming a first doped semiconductor layer on the first electrode by chemical vapor deposition; forming an intrinsic layer on the first doped semiconductor layer by chemical vapor deposition, where the intrinsic layer includes a plurality of amorphous/nanocrystalline silicon layers, and the intrinsic layer has various energy bandgaps formed by varying average grain sizes of the amorphous/nanocrystalline silicon layers; forming a second doped semiconductor layer on the intrinsic layer by chemical vapor deposition, where one of the first doped semiconductor layer and the second doped semiconductor layer is a p-type amorphous silicon layer and the other is an n-type amorphous/nano-microcrystalline silicon layer; and forming a second electrode on the second doped semiconductor layer.

Abstract: A phosphor material for producing white light under excitation of UV light and a method for making the same. The phosphor material is an alkaline-earth silicates compound with a chemical formula of (A2-x-yCexEuy)SiO4. A is one or more elements selected from the collection of Ba, Sr and Ca alkaline-earth metals. The range of x and y correspond to 0<x<1.0 and 0<y?0.5 respectively. The phosphor material requires two rare earth elements: Ce and Eu. By blending the best co-doped composition of Ce and Eu ions, the single phosphor can directly produce white light under UV light excitation. In addition, the material in this invention is easy and fast to prepare in a large amount. Therefore, the phosphors can have a high industrial value.

Abstract: A phosphor material for producing white light under excitation of UV light and a method for making the same. The phosphor material is an alkaline-earth silicates compound with a chemical formula of (A2-x-yCexEuy)SiO4. A is one or more elements selected from the collection of Ba, Sr and Ca alkaline-earth metals. The range of x and y correspond to 0<x<1.0 and 0<y?0.5 respectively. The phosphor material requires two rare earth elements: Ce and Eu. By blending the best co-doped composition of Ce and Eu ions, the single phosphor can directly produce white light under UV light excitation. In addition, the material in this invention is easy and fast to prepare in a large amount. Therefore, the phosphors can have a high industrial value.

Abstract: A phosphor can be excited by light emitting diode (LED) to emit a red light. The phosphor has high emission efficiency. Owing to a sensitizer is used in the phosphor, the phosphor can be excited at the wavelength of 380˜400 nm. Moreover, the excitation efficiency of the wavelength shorter than 370 nm can be increased.