Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a solar cell including a silicon nano wire.SOLUTION: Provided is a method for manufacturing a solar cell including: a first-type poly-Si layer formation step of forming a first-type poly-Si layer on a substrate; a metal film layer formation step of forming a metal film layer on the first-type poly-Si layer; a metal nanoparticle formation step of forming metal nanoparticles from the metal film layer; and a first-type Si nanowire growth step of growing first-type Si nanowires on the first-type poly-Si layer using the metal nanoparticles as seeds.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a solar cell by utilizing an induction coupled plasma enhanced chemical vapor deposition.SOLUTION: The method of manufacturing a solar cell 160 including a first electrode, a first type layer, an intrinsic layer, a second type layer and a second electrode includes an intrinsic layer formation step for forming the intrinsic layer consisting of a hydride amorphous silicon thin film by utilizing an induction coupled plasma enhanced chemical vapor deposition system using hydrogen (H) gas and silane (SiH) gas, where the ratio of silane gas to the hydrogen gas (H/SiHratio) of the mixed gas is 8-10.
Abstract:
PROBLEM TO BE SOLVED: To provide a magnesium-based alloy with superior fluidity and hot-tearing resistance and a manufacturing method thereof.SOLUTION: The method includes the processes of: melting a magnesium into liquid phase; adding an alkaline earth metal oxide into a molten magnesium alloy; exhausting the alkaline earth metal oxide through surface reduction reaction between the melt and the added alkaline earth metal oxide; and making alkaline earth metal produced by the exhaustion react with magnesium and/or other alloying elements in the magnesium alloy so that an intermetallic compound is formed. The magnesium alloy prepared by the method is excellent in fluidity and hot-tearing resistance. To this end, the alkaline earth metal oxide added is CaO, and the added amount of CaO is 1.4 to 1.7 times the target weight of Ca to be contained in the final Mg alloy.
Abstract:
PROBLEM TO BE SOLVED: To provide a magnesium alloy for normal temperature manufactured by adding an alkaline earth metal oxide to a melt of magnesium or the magnesium alloy, and also to provide a method for manufacturing the magnesium alloy.SOLUTION: CaO is added to the surface of the melt of the magnesium alloy and thereafter the CaO is used by the reducing action of the melt and the added CaO to generate a compound. Accordingly, the normal temperature mechanical properties (tensile strength, yield strength, elongation rate) of the magnesium alloy before the addition of the CaO are improved and the normal temperature mechanical properties are increased by the increase of the addition amount of the CaO.
Abstract:
PROBLEM TO BE SOLVED: To provide a magnesium based alloy for high temperature with improved strength and improved deformation resistance at high temperature, and also to provide a method for manufacturing the same.SOLUTION: This method is used for manufacturing the magnesium based alloy for a product for high temperature. Magnesium or the magnesium alloy is dissolved in a liquid state, CaO that is 1.4 times of a weight of a target composition of final Ca is added to a surface of a melt where the magnesium or the magnesium alloy is dissolved, and a target Ca amount is generated in the magnesium or the magnesium alloy by the reducing action of the melt and the added CaO. The generated Ca amount is 0.8-2.4 wt.%, and the final composition of the Mg alloy contains 6.0-8.0 wt.% of Al, 0.1-0.3 wt.% of Mn, 0.2-0.3 wt.% of Sr,