How to prepare polysilicon by the silane method?

Solar cell silicon material

How to prepare polysilicon by the silane method?

admin on December 17, 2021 0 Comments • Tags: #chemicalpreparationofpolysilicon #disadvantagesofsilanemethod #preparationmethodofpolysilicon

Silane is actually an abbreviation for monosilane. Silane is easy to thermally decompose, and high-purity polysilicon can be obtained by decomposing at 800~900℃, and the reduction energy consumption is low. In addition, monosilane is easy to purify and is a gas at room temperature, so it can be effectively removed by adsorption purification methods. The … Read More

How to prepare polysilicon by zinc reduction method?

Solar cell silicon material

How to prepare polysilicon by zinc reduction method?

admin on December 14, 2021 0 Comments • Tags: #problemsofzincreductionmethod #processflowofzincreductionmethod #technologyofpreparingpolysiliconbyzincreductionmethod

The technology for preparing polysilicon by the zinc reduction method is not the latest technology. In terms of history, it was born before the Siemens method. The zinc reduction method was first tested by DuPont in the United States during World War II, using zinc (Zn) to reduce SiCl4 to produce polysilicon. During the 1950s … Read More

Improved Siemens method preparation process and precautions

Solar cell silicon material

Improved Siemens method preparation process and precautions

admin on December 9, 2021 0 Comments • Tags: #improvedsiemenspreparationprocess #pointstonotefortheimprovedsiemensmethod #polysiliconpreparationprocess

1. Hydrogen preparationHydrogen is produced by electrolysis of desalinated water in the electrolytic cell, and the hydrogen is cooled, separated from the liquid, and then enters the deaerator. Under the action of the catalyst, the trace amount of oxygen in the hydrogen reacts with hydrogen to form water and is removed; the deoxygenated hydrogen is … Read More

Improved Siemens method to manufacture solar cell polysilicon

Solar cell silicon material

Improved Siemens method to manufacture solar cell polysilicon

admin on December 7, 2021 0 Comments • Tags: #advantagesoftheimprovedsiemensmethod #improvedsiemensprocessequipmentused #siemensprocess

In 1955, Siemens successfully developed the process technology of using H to reduce SiHCl3 to deposit silicon on a silicon core heating element, and built a factory in 1957 for industrial-scale production, which is commonly referred to as the Siemens method. Based on the Siemens process, it was further improved later, adding a reduction tail … Read More

What is the percentage of purity of metal silicon?

Solar cell silicon material

What is the percentage of purity of metal silicon?

admin on November 29, 2021 0 Comments • Tags: #impuritiesofmetalsilicon #metallurgicalgradesilicon #physicalmethodpolysilicon

The purity of the reduced silicon is mostly 98% to 99.9%, which is called metallurgical grade silicon (MG-Si). Metallurgical grade silicon, also known as industrial silicon, chemical silicon, crystalline silicon or metallic silicon, is mainly used as an additive for non-ferrous alloys, as an alloying agent for silicon steel, and as a deoxidizer for smelting … Read More

Silicon reduction equipment-composition of submerged arc furnace

Solar cell silicon material

Silicon reduction equipment-composition of submerged arc furnace

admin on November 19, 2021 0 Comments • Tags: #compositionofsubmergedarcfurnace #metallurgicalgradesiliconproductionequipment

The submerged arc furnace is composed of furnace body system, electrical system, charging system, discharge system, smoke exhaust system, cooling system, control system, power system, maintenance system and other equipment. The furnace body system consists of furnace shell, furnace lining, furnace cover, furnace bottom, controller (non-magnetic stainless steel), hanging cylinder steel platform, control tube (stainless … Read More

What is carbonaceous reducing agent?

Solar cell silicon material

What is carbonaceous reducing agent?

admin on November 12, 2021 0 Comments • Tags: #carbonaceousmaterial #metallurgicalsiliconpreparation #requirementsforcarbonaceousreducingagent

Metallurgical silicon preparation is mainly made by reducing siliceous raw materials with carbon in an electric arc furnace. When selecting a carbonaceous reducing agent for smelting silicon, the requirements: low ash content, strong reducing ability, high resistance, not easy to graphitize at high temperature, suitable particle size, high mechanical strength, etc. The chemical reaction activity … Read More

Basic knowledge of silicon

Solar cell silicon material

Basic knowledge of silicon

admin on November 6, 2021 0 Comments • Tags: #elementalsilicon #silica #siliconore

① Elemental siliconIn 1823, Bezelius of Sweden used silicon fluoride or potassium fluorosilicate and potassium to obtain powdered silicon and determined it as an element. The symbol of silicon is Si, atomic number 14, atomic weight 28.086, peripheral electron arrangement 3s²3p², located in group IV of the third cycle, covalent radius 117pm, ion radius 42pm, … Read More

Current status of solar cell polysilicon

Solar cell silicon material

Current status of solar cell polysilicon

admin on November 2, 2021 0 Comments • Tags: #crystallinesilicon #methodofproducingpolysilicon #polysiliconproductiontechnology

Crystalline silicon is divided into single crystal silicon and polycrystalline silicon. Monocrystalline silicon is expensive. Although the quality of polycrystalline silicon is not as good as monocrystalline silicon, its production cost is only 1/20 of that of monocrystalline silicon because it does not require time-consuming and energy-consuming single crystal pulling processes, and it can be … Read More

Comparison of various thin film solar cells

Solar cell silicon material

Comparison of various thin film solar cells

admin on October 28, 2021 0 Comments • Tags: #amorphoussiliconthinfilmsolarcells #cadmiumtelluridethinfilmsolarcell #copperindiumseleniumfilmcell #organicsemiconductorthinfilmsolarcells

Thin-film materials have great potential in reducing costs: ①The thickness of cell thin-film materials ranges from micrometers to tens of micrometers, which is one-tenth of that of monocrystalline silicon and polycrystalline silicon solar cells, and the thin film is directly deposited without loss of slicing. , Can greatly save raw materials; ② can use integrated … Read More