Method for preparing nanometer silver particles with controllable silicon surface appearances by using silver mirror reaction
A technology of nano-silver particles and silver mirror reaction, which is applied in the directions of climate sustainability, final product manufacturing, renewable energy products, etc., can solve the problems of weakened catalytic effect of nano-silver particles and poor etching effect, etc., and the method is simple. , good repeatability
Active Publication Date: 2013-05-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
If the silicon substrate is directly placed in the reaction solution to deposit nano-silver particles, the additives in the solution will adhere to the silicon surface, weakening the catalytic effect of nano-silver particles, resulting in no catalytic etching or worsening the etching effect
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Embodiment 1
[0022] 1. Use a (100) silicon single wafer with a resistivity of 7-13 Ω?cm, put it in acetone, and ultrasonically clean it at room temperature for 10 minutes; rinse it with deionized water for 2 minutes; then wash it in CP-4A (HF, HNO 3 、CH 3 COOH, H 2 O mixed solution, the volume ratio is 3:5:3:22) soaked in the solution for 5 minutes; soaked in hydrofluoric acid solution with a concentration of 7.3 mol / L for 5 minutes; then ultrasonically cleaned with deionized water for 10 minutes; finally Rinse with deionized water for 2 min; store in vacuum dry;
[0023] 2. First put silver nitrate solution in the reaction vessel, the concentration is controlled between 0.002~0.1 mol / L, then gradually add ammonia water with a concentration of 0.3 mol / L, and keep stirring until the turbid brown liquid produced becomes clarify;
[0024] 3. Put the silver ammonia solution at 4 ℃, 25 ℃ and 60 ℃ respectively, add glucose solution with a concentration of 0.005~0.01 mol / L dropwise, and put it...
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The invention belongs to the technical field of a nanometer structure of a solar battery, and especially relates to a method for preparing nanometer silver particles with controllable silicon surface appearances by using silver mirror reaction. According to the method for preparing the nanometer silver particles with the controllable silicon surface appearances by using the silver mirror reaction, provided by the invention, the nanometer silver particles with controllable sizes, shapes and uniformities are prepared on (100) the surfaces of silicon wafers by using the non-additive silver mirror reaction at different temperatures; and silicon surface nanometer structures with different appearances can be obtained by using the nanometer silver particles with the different appearances for catalytic etching. By virtue of the method for preparing the nanometer silver particles with the controllable silicon surface appearances by using the silver mirror reaction, provided by the invention, a nanometer silver particle plating process is simplified through the silver mirror reaction on the basis of keeping a catalytic etching characteristic; the silver particles shaped like a long rice, a short rod and a polyhedron and flocculent silver can be prepared; and a novel method is provided for an appearance controllable preparation process of silicon surface catalytic silver particles. The nanometer silver particles can be directly applied to the catalytic etching process; the nanometer structure with the silicon surface with round holes, dense small holes, concave-convex holes and square holes is prepared; and the controllable preparation of a nanometer light trapping structure in a solar battery is realized.
Description
technical field [0001] The invention belongs to the technical field of solar cell nanostructures, and in particular relates to a method for preparing nano-silver particles with controllable silicon surface morphology by utilizing silver mirror reaction. Background technique [0002] Silicon solar cells occupy a dominant position in the solar cell market due to the advantages of wide source of raw materials, mature technology, high photoelectric conversion efficiency, stable photoelectric performance and good reliability. At present, the focus of research on silicon solar cells is to reduce costs and improve conversion efficiency, and reducing the energy loss of incident sunlight on the surface of photovoltaic devices is one of the means to improve photoelectric conversion efficiency. Optical structure has always been a subject that researchers pay attention to and continue to study. At present, there are two commonly used anti-reflection measures: one is to prepare an anti-...
Claims
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Login to View More IPC IPC(8): C23C18/44C23F1/24C23F1/02H01L31/18
CPCY02P70/521Y02P70/50
Inventor 姜冰李美成白帆余航
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)