Method of manufacturing finger electrode for solar cell

Patent metadata

Field	Value
Publication number	US-10096727-B2
Application number	US-201715632437-A
Country	US
Kind code	B2
Filing date	Jun 26, 2017
Priority date	Oct 28, 2016
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A method of manufacturing a finger electrode for a solar cell, the method including printing a conductive paste on a front surface of a substrate using a printing mask having an opening rate of about 65% or more and baking the printed conductive paste. The conductive paste includes a conductive powder, a glass frit including about 30 mol % to about 60 mol % of tellurium oxide and about 0.1 mol % to about 10 mol % of tungsten oxide, and an organic vehicle.

First claim

What is claimed is:

1. A method of manufacturing a finger electrode for a solar cell, the method comprising:
(a) printing a conductive paste on a front surface of a substrate using a printing mask having an opening rate of about 65% or more, the printing mask including a mesh, a photosensitive resin layer integrated with the mesh, and an electrode printing portion formed by removing the photosensitive resin layer; and
(b) baking the printed conductive paste,
wherein the conductive paste includes a conductive powder, a glass frit including about 30 mol % to about 60 mol % of tellurium oxide and about 0.1 mol % to about 10 mol % of tungsten oxide, and an organic vehicle.

2. The method as claimed in claim 1 , wherein the printing mask has an opening rate of about 65% to about 90%.

3. The method as claimed in claim 1 , wherein:
the mesh includes weft threads, and
a distance between weft threads of the mesh above and below the electrode printing portion is greater than a distance between weft threads of the mesh in other regions.

4. The method as claimed in claim 1 , wherein baking of the conductive paste is performed at about 600° C. to about 1,000° C.

5. The method as claimed in claim 1 , wherein the glass frit further includes at least one of lead (Pb) and bismuth (Bi) and at least one selected from lithium (Li), zinc (Zn), and magnesium (Mg) oxides.

6. The method as claimed in claim 1 , wherein the conductive paste includes about 60 wt % to about 95 wt % of the conductive powder, about 0.5 wt % to about 20 wt % of the glass frit, and about 1 wt % to about 30 wt % of the organic vehicle.

7. The method as claimed in claim 1 , wherein the conductive paste further includes at least one additive selected from a dispersant, a thixotropic agent, a plasticizer, a viscosity stabilizer, an anti-foaming agent, a pigment, a UV stabilizer, an antioxidant, and a coupling agent.

8. A finger electrode for a solar cell manufactured by the method of manufacturing a finger electrode for solar cells as claimed in claim 1 .

9. A solar cell including the finger electrode as claimed in claim 8 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Jung Seok Hyun
• Kim Min Jae
• Yang Sang Hyun
• Koo Hyun Jin
• Kim Dong Suk
• Kim Ju Hee
• Park Young Ki
• Lee Min Young

Classifications

• H01L31/022433 Primary

  Electricity · mapped topic

• H10F71/00

  Manufacture or treatment of devices covered by this subclass (patterning processes to connect thin photovoltaic cells in integrated devices, or assemblies of multiple devices, having photovoltaic cells H10F19/33; manufacture or treatment of encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells H10F19/80; manufacture or treatment of integrated devices, or assemblies of multiple devices, comprising at least one element in which radiation controls the flow of current H10F39/00) · CPC title

• H10F77/311

  for photovoltaic cells · CPC title

• H10F77/93

  Interconnections · CPC title

• H10F77/211 Primary

  for photovoltaic cells · CPC title