Conductive glass powder and its preparation method, crystalline silicon solar battery aluminum conductive paste and preparation method

A technology of conductive glass powder and solar cells, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problems of low photoelectric conversion efficiency and large contact resistance of batteries

Inactive Publication Date: 2013-07-17
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of large back field contact resistance and low photoelectric conversion efficiency of existing crystalline silicon solar cells,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The invention provides a method for preparing conductive glass powder, which comprises uniformly mixing metal lithium or silver halogen compound powder and glass oxide in proportion, heating up and melting, water quenching and filtering to obtain glass beads, and glass beads after ball milling to obtain glass powder .

[0017] The invention provides a preparation method of conductive glass powder, which specifically comprises mixing metal lithium or silver halide compound powder with Bi 2 o 3 , B 2 o 3 , SiO 2 Mix the oxide powder evenly according to a certain proportion, put it into a porcelain crucible, put it into a silicon carbide rod furnace, heat it up to 500~600°C and keep it for 0.2-0.8h, then raise it to 1200~1300°C, and melt for 0.5~2h. Water quenching and filtration, the obtained glass beads are put into a ball mill tank, and the mass ratio is controlled. The mass ratio of zirconia balls, glass beads and deionized water is 4:0.8-1.2:0.5-0.8, and the tank ...

Embodiment 1

[0034] Step 1: Preparation of conductive glass powder

[0035] Take 35wt% AgI, 30wt% Bi 2 o 3 , 20wt% B 2 o 3 , 10wt% SiO 2 , 3.5wt% CaO, 1.5wt% MgO, using a V-type mixer to mix evenly, put it into a porcelain crucible, put it into a silicon carbide rod furnace, heat up to 550°C, keep it for 0.5h, and then rise to 1250°C , smelting for 1.0h, water quenching and filtering, put the obtained glass beads into a ball mill tank, control the mass ratio, zirconia balls: glass beads: deionized water = 4:1:0.8, tank speed 300 rpm, ball mill for 6 hours, Filtration, drying, and dry grinding for 0.2-1.0h, the mass ratio of zirconia balls to glass beads is 1:2 during dry grinding, and the medium particle size D 50 1.5 μm conductive glass powder, spare.

[0036] Step 2: Configuration of organic carrier

[0037] According to the mass ratio of butyl carbitol: terpineol: butyl carbitol acetate=75:15:10, the organic solvent is mixed evenly to form the mixed solvent of the slurry. Based ...

Embodiment 2

[0041] Change the AgI of 35wt% in the step one among the embodiment 1 into the LiCl of 30wt%, Bi 2 o 3 The amount was changed from 30wt% to 35wt% to obtain conductive glass powder, and the rest were the same as in Example 1 to obtain aluminum conductive paste for crystalline silicon solar cells.

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Abstract

The invention provides a conductive glass powder and its preparation method. The glass powder comprises a glass oxide and 10-40wt% of a halogen compound of metal lithium or silver. The invention also provides a crystalline silicon solar battery aluminum conductive paste containing the conductive glass powder and a preparation method thereof. The aluminum conductive paste prepared from the conductive glass powder provided by the invention can improve the photoelectric conversion efficiency of a crystalline silicon solar battery. The formed aluminum film has small square resistance and high fill factor, the battery piece has small bending, the silicon-aluminum layer is smooth and has good adhesion, and the average photoelectric conversion efficiency of an ordinary monocrystalline silicon battery is greater than 18.20%.

Description

technical field [0001] The invention belongs to the technical field of crystalline silicon solar cells, and in particular relates to a conductive glass powder and a preparation method thereof, a crystalline silicon solar cell aluminum conductive paste and a preparation method thereof. Background technique [0002] Aluminum conductive paste is one of the electronic information materials, and it is also the main auxiliary material for making crystalline silicon solar cells, which occupies a considerable proportion in the cost of the battery materials. Silicon solar cells are an inexhaustible green and renewable energy source, and the current international research is very active. The composition, production, printing and sintering process of aluminum paste all have a great influence on the performance of solar cells. At present, the mature products of international large companies, some research institutes and slurry manufacturers in my country, as long as the formula composi...

Claims

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Application Information

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IPC IPC(8): C03C12/00H01B1/22H01B13/00
Inventor 谭伟华廖炜符燕青姜占锋
Owner BYD CO LTD
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