Photovoltaic module package

• US 9,701,567 B2
• Filed: 04/24/2014
• Issued: 07/11/2017
• Est. Priority Date: 04/29/2013
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Aitken, Bruce Gardiner, Ellison, Adam James, Kiczenski, Timothy James, Hamilton, James Patrick
• Primary Examiner(s): Bolden, Elizabeth A
• Application Number:
  US14/260,625
• Publication Number:
  US 20140323286A1
• Time in Patent Office: 1,174 Days
• CPC Class Codes: C03C 3/085 containing an oxide of a divalent metal
• CPC Class Codes: C03C 3/087 containing calcium oxide, e.g. common sheet or container glass
• CPC Class Codes: C03C 3/091 containing aluminium
• CPC Class Codes: Y02E 10/541 CuInSe2 material PV cells

Abstract

Fusion-formable sodium-containing aluminosilicate and boroaluminosilicate glasses are described. The glasses are particularly useful for controlled release of sodium—useful in semiconductor applications, such as thin film photovoltaics where the sodium required to optimize cell efficiency is to be derived from the substrate glass.

Claims

1. A glass comprising, in mol %:

70-77 SiO₂

4.5-10.5 Al₂O₃

>

0-5 B₂O₃

3-5 MgO

>

0-5 CaO

0-5 SrO

1.8-11.8 Na₂O

0-3 ZnO

0-6 K₂O

3<

R′

O≦

12, and

7≦

R₂O≦

13,

wherein R′

O=MgO+CaO+SrO+BaO, R₂O=Na₂O+K₂O, the glass has a Na release greater than 10 ppm in a buffered aqueous release test, a total Na+K release of less than 30 ppm in a buffered aqueous release test, a T^margin=T^breakdown−

T^35kp>

10°

C., and a strain point greater than 565°

C.

2. The glass of claim 1, wherein the glass has a coefficient of thermal expansion greater than 6 ppm/°

C.

3. The glass of claim 1, wherein the glass has a strain point greater than 585°

C.

4. The glass of claim 1, wherein the glass has a liquidus viscosity greater than 130 kP.

5. The glass of claim 1, wherein the glass comprises ZnO or K₂O.

6. The glass of claim 5, wherein the glass comprises B₂O₃ and K₂O.

7. An electronic device comprising the glass of claim 1.