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Conductive slurry for solar battery and preparation method

A technology of solar cells and conductive pastes, applied in circuits, electrical components, semiconductor devices, etc., can solve the problems of unsatisfactory photoelectric conversion efficiency of solar cells, and achieve excellent mesh performance, uniform appearance and texture, and small bending degree Effect

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is that the photoelectric conversion efficiency of the solar cell using the conductive paste in the prior art is not ideal, and a new type of solar cell conductive paste with excellent photoelectric conversion efficiency is specially provided

Method used

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  • Conductive slurry for solar battery and preparation method
  • Conductive slurry for solar battery and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Preparation of glass powder

[0020] Get 65wt% bismuth oxide (Bi 2 o 3 ) (oxides are all purchased from Tianjin Kemiou Chemical Reagent Co., Ltd., analytically pure, the same below), 12wt% boron oxide (B 2 o 3 ), 8.0wt% of silicon dioxide (SiO 2 ), 10wt% zinc oxide (ZnO), 3.0wt% aluminum oxide (Al 2 o 3 ), 2.0wt% magnesium oxide (MgO) was evenly mixed with a V-type mixer, put into a porcelain crucible, put into a silicon carbide rod furnace, heat up to 500°C, keep it warm for 0.5 hours, then rise to 950°C, and smelt After 0.5 hour, quench and filter with water, put the obtained glass beads into a ball mill tank, control the mass ratio, zirconia ball: glass beads: deionized water = 4:1:0.5, tank speed 150-250r / min, ball mill for more than 48h, filter , dried to obtain the medium particle size D 50 The glass powder at 0.2μm is ready for use.

[0021] Step 2: Configuration of organic carrier

[0022] Get terpineol according to mass ratio (organic solvent i...

Embodiment 2

[0026] Step 1: Preparation of glass powder

[0027] Same as Example 1.

[0028] Step 2: Configuration of organic carrier

[0029] Same as Example 1.

[0030] Step 3: Preparation of conductive paste

[0031] Change the large particle size aluminum powder into aluminum powder with a particle size of 6 μm, and change the small particle size aluminum powder into aluminum powder with a particle size of 35 nm. The rest is the same as step 3 of Example 1 to obtain the finished aluminum conductive paste A2.

Embodiment 3

[0033] Step 1: Preparation of glass powder

[0034] Same as Example 1.

[0035] Step 2: Configuration of organic carrier

[0036] Same as Example 1.

[0037] Step 3: Preparation of conductive paste

[0038] Change the aluminum powder with large particle size to aluminum powder with a particle size of 6 μm, and the aluminum powder with small particle size to aluminum powder with a particle size of 10 nm. The rest is the same as Step 3 of Example 1 to obtain the finished aluminum conductive paste A3.

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Abstract

The invention discloses conductive slurry for a solar battery and a preparation method thereof. The conductive slurry comprises conductive metal powder, an inorganic binder, an organic carrier and an additive, wherein the conductive metal powder comprises two kinds of metal powder with different grain sizes, the grain size of the large-grain-size metal powder is 4 to 6 mum and that of the small-grain-size metal powder is 1 to 100nm. The photoelectric conversion efficiency of the solar battery prepared by the conductive slurry provided by the invention is obviously improved; and the conductiveslurry has a homogenous appearance texture, a smooth surface and no air bubbles and generates no precipitates after long-time standing.

Description

technical field [0001] The invention relates to a conductive paste for solar cells, more specifically to a conductive paste for solar cells and a preparation method thereof. Background technique [0002] The current research on solar cells is very active. Solar cells are expected to become the main pillar of future power supply. Crystalline silicon solar cells are the leading products in the PV (photovoltaic) market because of their most mature technology and process and stable performance. Conductive paste is the main auxiliary material for making crystalline silicon solar cells. It occupies a considerable proportion in the cost of the cell materials. It almost covers the entire back of the cell, and the formed back electric field can increase the open circuit voltage and short circuit current of the solar cell. The production and sintering process of the paste have a great influence on the performance of the solar cell. [0003] The slurry is mainly composed of functional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/18
CPCY02P70/50
Inventor 刘珍谭伟华周勇姜占锋
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