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An inorganic additive that can reduce the contact resistance of the back electrode of solar cells

A technology of inorganic additives and back electrode contact, which is applied to conductive materials, circuits, and electrical components dispersed in non-conductive inorganic materials to achieve the effects of low activity efficiency, reduced addition amount, and large specific surface area.

Active Publication Date: 2015-08-05
JIANGSU RUIDE NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of these traditional inorganic additives on reducing the contact resistance of the back electrode of solar cells needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The invention is a high-efficiency inorganic additive capable of reducing the contact resistance of the back electrode of a solar cell, which consists of 88% by weight of bismuth trioxide nanotubes, 9% of manganese dioxide nanotubes, and 1% of tin dioxide nanotubes , 1% zinc oxide nanotubes and 1% titanium dioxide nanotubes; among them, the average length of bismuth trioxide nanotubes is 0.1-1 μm, and the average diameter is 10-20 nm; the average length of manganese dioxide nanotubes The average length of tin dioxide nanotubes is 0.1-1.5 μm, and the average diameter is 20-50 nm; the average length of zinc oxide nanotubes is 0.1-1 μm, and the average diameter The average length of titanium dioxide nanotubes is 0.1-1 μm, and the average diameter is 10-20 nm.

Embodiment 2

[0013] The invention is a high-efficiency inorganic additive capable of reducing the contact resistance of the back electrode of a solar cell, which consists of 50% bismuth trioxide nanotubes, 20% manganese dioxide nanotubes, and 12% tin dioxide nanotubes. , 3% zinc oxide nanotubes and 15% titanium dioxide nanotubes; among them, the average length of bismuth trioxide nanotubes is 0.1-1 μm, and the average diameter is 10-20 nm; the average length of manganese dioxide nanotubes The average length of tin dioxide nanotubes is 0.1-1.5 μm, and the average diameter is 20-50 nm; the average length of zinc oxide nanotubes is 0.1-1 μm, and the average diameter The average length of titanium dioxide nanotubes is 0.1-1 μm, and the average diameter is 10-20 nm.

Embodiment 3

[0015] The invention is a high-efficiency inorganic additive capable of reducing the contact resistance of the back electrode of a solar cell, which consists of 60% bismuth trioxide nanotubes, 10% manganese dioxide nanotubes, and 10% tin dioxide nanotubes , 10% zinc oxide nanotubes and 10% titanium dioxide nanotubes; among them, the average length of bismuth trioxide nanotubes is 0.1-1 μm, and the average diameter is 10-20 nm; the average length of manganese dioxide nanotubes The average length of tin dioxide nanotubes is 0.1-1.5 μm, and the average diameter is 20-50 nm; the average length of zinc oxide nanotubes is 0.1-1 μm, and the average diameter The average length of titanium dioxide nanotubes is 0.1-1 μm, and the average diameter is 10-20 nm.

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Abstract

The invention relates to efficient inorganic additive for lowering contact resistance of a back electrode of a solar cell. The efficient inorganic additive comprises, by weight percent, 50-88% of bismuth trioxide nanotube, 9-20% of manganese dioxide nanotube, 1-20% of tin oxide nanotube, 1-20% of zinc oxide nanotube and 1-20% of titanium oxide nanotube. The nanotubes are summed up to 100% by weight percent. Compared with the prior art, the efficient inorganic additive has the components which are highly flexural and can wind on surfaces of glass powder and silver powder in sliver paste so as to allow the sliver powder to contact with the glass powder in multi-point manner, so that actions of the components are given to fuller play. In addition, the nanotube inorganic additive forms gaps, excessive sintering of the sliver powder can be avoided while formation of conductive path of the sliver powder is not broken, and accordingly the contact resistance of the back electrode of the solar cell can be lowered.

Description

technical field [0001] The invention relates to an inorganic additive for solar cell electronic paste, in particular to an efficient inorganic additive capable of reducing the contact resistance of a solar cell back electrode. Background technique [0002] A solar cell is a semiconductor device that converts solar energy into electricity. The back busbar of the solar cell is the main component of the solar cell, and it plays the role of converging and exporting the current collected by the aluminum back field in the solar cell. The back silver paste used to make the back busbar of solar cells is mainly composed of silver powder, organic binder, inorganic binder, solvent and additives in terms of formula. In order to meet the requirements of reducing production costs, the silver content of the back silver paste has decreased by 20-30% compared with the previous generation, but the decrease of the silver content in the back silver paste will also affect the contact between th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/16H01L31/0224
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
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