Paste for forming solar cell electrode and electrode prepared using the same

Patent metadata

Field	Value
Publication number	US-10720260-B2
Application number	US-201514936026-A
Country	US
Kind code	B2
Filing date	Nov 9, 2015
Priority date	Nov 13, 2014
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

A paste for solar cell electrodes includes a conductive powder, a glass frit, and an organic vehicle. The glass frit includes bismuth (Bi), tellurium (Te), and antimony (Sb), and has a mole ratio of bismuth (Bi) to tellurium (Te) of about 1:1 to about 1:30.

First claim

What is claimed is:

1. A paste for solar cell electrodes, the paste comprising:
a conductive powder,
a glass frit, and
an organic vehicle,
wherein the glass frit is prepared from a metal oxides mixture comprising lithium oxide (Li 2 O) in an amount of 2 wt % to about 10 wt %, bismuth oxide (Bi 2 O 3 ) in an amount of about 3 wt % to about 45 wt %, tellurium oxide (TeO 2 ) in an amount of 40 wt % to 85 wt %, tungsten oxide (WO 3 ) in an amount of 0 wt % to 4 wt %, and zinc oxide (ZnO) in an amount of 3 wt % to 9.5 wt %,
wherein the glass frit includes bismuth (Bi), tellurium (Te), lithium (Li), antimony (Sb), and zinc (Zn), and optionally tungsten (W), and has a mole ratio of bismuth (Bi) to tellurium (Te) of 1:1.5 to about 1:30,
wherein the glass frit has a mole ratio of bismuth (Bi) to antimony (Sb) of about 1:0.05 to about 1:5, and
wherein, when the glass frit includes tungsten(W), a mole ratio of bismuth (Bi) to tungsten (W) is about 1:0.01 to about 1:1.

2. The paste for solar cell electrodes as claimed in claim 1 , wherein the glass frit further includes sodium (Na).

3. The paste for solar cell electrodes as claimed in claim 1 , including:
from about 60 wt % to about 90 wt % of the conductive powder;
from about 1 wt % to about 10 wt % of the glass fit; and
from about 5 wt % to about 30 wt % of organic vehicle.

4. The paste for solar cell electrodes as claimed in claim 1 , wherein the conductive powder includes at least one of silver (Ag), gold (Au), palladium (Pd), platinum (Pt), copper (Cu), chromium (Cr), cobalt (Co), aluminum (Al), tin (Sn), lead (Pb), zinc (Zn), iron (Fe), iridium (Ir), osmium (Os), rhodium (Rh), tungsten (W), molybdenum (Mo), nickel (Ni), and indium tin oxide (ITO).

5. The paste for solar cell electrodes as claimed in claim 1 , wherein the glass frit has an average particle diameter (D50) of about 0.1 μm to about 5 μm.

6. The paste for solar cell electrodes as claimed in claim 1 , further including at least one of 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.

7. A solar cell electrode prepared from the paste for solar cell electrodes as claimed in claim 1 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Dong Suk
• Kim Juhee
• Park Min Su
• Park Young Ki
• Yang Sang Hyun
• Jung Seok Hyun

Classifications

• H10F77/20

  Electrodes · CPC title

• H10F77/211

  for photovoltaic cells · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• H01B1/22

  the conductive material comprising metals or alloys · CPC title