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Method of making solar cell electrodes

一种电极、导电浆料的技术，应用在分散在不导电无机材料中的导电材料、电路、电气元件等方向，能够解决低转换效率、电接触不充分等问题

Active Publication Date: 2016-07-06
SOLAR PASTE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the case of N-type substrate solar cells, the solar cell electrodes sometimes have insufficient electrical contact with the semiconductor, resulting in lower conversion efficiencies

Method used

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  • Method of making solar cell electrodes
  • Method of making solar cell electrodes
  • Method of making solar cell electrodes

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Experimental program
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example

[0078] The invention is illustrated by, but not limited to, the following examples.

[0079] Preparation of conductive paste

[0080] A conductive paste for forming a p-type electrode was prepared according to the following procedure by using the following materials.

[0081] - Conductive powder: Spherical silver (Ag) powder having a particle diameter (D50) of 3 μm measured by a laser scattering type particle size distribution measuring instrument was used.

[0082] - Aluminum (Al) powder: Spherical aluminum (Al) powder having a particle diameter (D50) of 3.5 μm measured by a laser scattering type particle size distribution measuring instrument was used.

[0083] - Glass frit: Glass frit contains 50.0 mol% of PbO, 22.0 mol% of SiO 2 , 2.0 mol% Al 2 o 3 , 26.0 mol% of B 2 o 3 . The softening point by DTA was 434°C.

[0084] - Organic medium: Esterol-12 solution of ethylcellulose.

[0085] - Additives: viscosity modifiers.

[0086] The organic medium was mixed with t...

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Abstract

The invention relates to a method of manufacturing a p-type electrode, said method comprising the steps of: preparing an n-type base semiconductor substrate comprising an n-base layer, a p-type emitter on the n-base layer, a first passivation on the p-type emitter layer and a second passivation layer on the n-base layer; a conductive paste is applied to said first passivation layer, wherein said conductive paste comprises: (i) 100 parts by weight of conductive powder, said conductive The powder comprises a metal selected from silver, nickel, copper and mixtures thereof, (ii) 0.3 to 8 parts by weight of aluminum powder having a particle size of 3 to 11 μm, (iii) 3 to 22 parts by weight of glass frit, and (iv) ) an organic medium; and firing the conductive paste.

Description

[0001] Cross References to Related Applications [0002] This patent application claims the benefit of US Provisional Application 61 / 472,381, filed April 6, 2011. technical field [0003] The present invention relates to N-type substrate solar cells, and more particularly to methods of making their p-type electrodes. Background technique [0004] Solar cell electrodes are required to have low resistance to improve the conversion efficiency (Eff) of solar cells. Especially in the case of N-type substrate solar cells, the solar cell electrodes sometimes have insufficient electrical contact with the semiconductor, resulting in lower conversion efficiencies. [0005] US20100059106 discloses that a conductive paste for forming a p-type electrode of an N-type substrate solar cell contains conductive powder (such as Ag), added particles (such as Mo, Tc, Ru, Rh, Pd, W, Re, Os, Ir or Pt) , glass frit and resin binder. Contents of the invention [0006] It is an object of the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22
CPCH01B1/22H01L31/022425Y02E10/50
Inventor 武田宪彦
Owner SOLAR PASTE LLC