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Small-texture monocrystal silicon solar cell texture-manufacturing promoter and application thereof

A technology of solar cells and accelerators, applied in the direction of crystal growth, post-processing details, post-processing, etc., can solve the problems of poor controllability of texturing effect, and achieve the effect of improving process stability and consistency

Inactive Publication Date: 2012-02-01
上海晶太新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently using traditional cashmere liquid (NaOH / Na 2 SiO 3 / IPA(AL)) has poor controllability in the texture making effect, and the resulting texture is too large, basically reaching more than 5um

Method used

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  • Small-texture monocrystal silicon solar cell texture-manufacturing promoter and application thereof
  • Small-texture monocrystal silicon solar cell texture-manufacturing promoter and application thereof
  • Small-texture monocrystal silicon solar cell texture-manufacturing promoter and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The proportion of the accelerator is 0.05% of methyl pyruvate, 0.1% of vitamin C, 1% of oxalic acid, 0.3% of lactic acid, 1% of isopropanol, 2.0% of NaOH, and the rest is deionized water. Add 50ml of accelerator configured according to the above formula into a 100L single crystal texturing tank. The content of NaOH is 1.2% and the content of IPA is 2% in the texturing tank. After mixing evenly, the temperature of the texturing tank is controlled at 80°C , after stirring evenly, soak the monocrystalline silicon wafer into the texturing tank for reaction, the texturing time is controlled at 900 seconds, and the average size of the textured pyramids obtained is about 5um.

Embodiment 2

[0025] The proportion of the accelerator is 0.1% of methyl pyruvate, 0.5% of vitamin C, 1% of oxalic acid, 0.1% of lactic acid, 1% of isopropanol, 1.0% of NaOH, and the rest is deionized water. Add 50ml of accelerator configured according to the above formula into a 100L single crystal texturing tank. The content of NaOH is 1.2% and the content of IPA is 2% in the texturing tank. After mixing evenly, the temperature of the texturing tank is controlled at 80°C , after stirring evenly, soak the monocrystalline silicon wafer into the texturing tank for reaction, the texturing time is controlled at 1200 seconds, and the average size of the textured pyramid is about 4um.

Embodiment 3

[0027] The proportion of the accelerator is 0.2% of methyl pyruvate, 0.8% of vitamin C, 1% of oxalic acid, 0.05% of lactic acid, 1% of isopropanol, 1% of NaOH, and the rest is deionized water. Add 50ml of accelerator configured according to the above formula into a 100L single crystal texturing tank. The content of NaOH is 1.2% and the content of IPA is 2% in the texturing tank. After mixing evenly, the temperature of the texturing tank is controlled at 80°C , after stirring evenly, soak the monocrystalline silicon wafer into the texturing tank for reaction, the texturing time is controlled at 1200 seconds, and the average size of the textured pyramids obtained is about 3um.

[0028] Implementation 4

[0029] The proportion of the accelerator is 0.5% of methyl pyruvate, 2% of vitamin C, 1% of oxalic acid, 0.01% of lactic acid, 1% of isopropanol, 0.5% of NaOH, and the rest is deionized water. Add 50ml of accelerator configured according to the above formula into a 100L single ...

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Abstract

The invention relates to a small-texture monocrystal silicon solar cell texture-manufacturing promoter and an application thereof. The promoter comprises components of, by weight: 0.01 to 5% of methyl pyruvate, 0.01 to 5% of vitamin C, 0.01 to 3% of oxalic acid, 0.01 to 5% of lactic acid, 0.1 to 2% of isopropyl alcohol, and 0.1 to 2% of alkali. The promoter is added into a monocrystal texture-manufacturing tank containing a mixed solution of alkali and isopropamide (IPA); the temperature in the texture-manufacturing tank is controlled at 80 DEG C; the mixture is well-mixed; and monocrystal silicon chips are immersed into the texture-manufacturing tank for carrying out a reaction. Compared to prior arts, with the promoter provided by the invention, the sizes of the surface textures of a monocrystal silicon solar cell are basically controlled within 1 to 5mun, such that stability and consistency of monocrystal silicon texture-manufacturing technology are improved.

Description

technical field [0001] The invention relates to a texturing process in the manufacturing process of monocrystalline silicon solar cells, in particular to a texturing accelerator for small textured monocrystalline silicon solar cells and its application. Background technique [0002] At present, with the further deterioration of the climate environment and the limitation of conventional energy sources, many countries in the world have set off an upsurge in the development and utilization of renewable energy sources. Among them, solar energy technology, as a representative of this type of new energy source, has been favored by the scientific and technological circles and economic circles of various countries. Extensive attention has also led to the rapid development of solar energy technology, in which the use of photovoltaic effects of semiconductors to convert solar energy into electrical energy is becoming more and more widely used. Monocrystalline silicon solar cells are t...

Claims

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Application Information

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IPC IPC(8): C30B33/10
Inventor 章亚男叶俊
Owner 上海晶太新能源科技有限公司