IP Library › Granted Patent US 8,198,529
Granted Patent B2
US 8,198,529 · App. 12/434,059 · Granted Jun 12, 2012

Transparent conductive materials including cadmium stannate

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Quick Facts
Patent No.
US 8,198,529
App. No.
12/434,059
Granted
Jun 12, 2012
Kind
B2
Abstract

A photovoltaic cell can include a transparent conductive layer including cadmium stannate.

Claims (5)

1. A photovoltaic device comprising:

a transparent conductive layer on a substrate, the transparent conductive layer comprising cadmium stannate, wherein cadmium has a concentration of about 67 percent to about 75 percent by weight and wherein the cadmium to tin ratio is greater than about 2.03:1 and less than about 3:1; and

a semiconductor layer adjacent to the transparent conductive layer, the semiconductor layer comprising cadmium.

2. The device of claim 1 , wherein the transparent conductive oxide has a figure of merit, 1/(the square root of (average absorption*sheet resistance)), of greater than 0.9, wherein the average absorption is the absorption averaged over a wavelength interval of 350-850 nanometers.

3. The device of claim 1 , wherein the cadmium to tin ratio is about 2.03:1 to about 2.3:1.

Assignments (9)
RELEASE OF SECURITY INTEREST Recorded Feb 13, 2026
From: JPMORGAN CHASE BANK, N.A.
To: FIRST SOLAR, INC.
Reel/Frame 074858/0364 →
SECURITY INTEREST Recorded Jul 10, 2023
From: FIRST SOLAR, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 064237/0462 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS Recorded Nov 15, 2021
From: JPMORGAN CHASE BANK, N.A.
To: FIRST SOLAR, INC.
Reel/Frame 058132/0566 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS Recorded Nov 15, 2021
From: JPMORGAN CHASE BANK, N.A.
To: FIRST SOLAR, INC.
Reel/Frame 058132/0261 →
PATENT SECURITY AGREEMENT Recorded Jul 12, 2017
From: FIRST SOLAR, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 043177/0581 →
CORRECTIVE ASSIGNMENT TO CORRECT THE PATENT APPLICATION 13/895113 ERRONEOUSLY ASSIGNED BY FIRST SOLAR, INC. TO JPMORGAN CHASE BANK, N.A. ON JULY 19, 2013 PREVIOUSLY RECORDED ON REEL 030832 FRAME 0088. ASSIGNOR(S) HEREBY CONFIRMS THE CORRECT PATENT APPLICATION TO BE ASSIGNED IS 13/633664. Recorded Sep 19, 2014
From: FIRST SOLAR, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 033779/0081 →
SECURITY AGREEMENT Recorded Jul 19, 2013
From: FIRST SOLAR, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 030832/0088 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 10, 2011
From: ROBERTS, DALE; GERMAN, JOHN; BURROWS, KEITH J.; BULLER, BENYAMIN; PASHMAKOV, BOIL
To: FIRST SOLAR, INC.
Reel/Frame 025933/0495 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 14, 2010
From: ROBERTS, DALE; GERMAN, JOHN; BURROWS, KEITH J.; BULLER, BENYAMIN; PASHMAKOV, BOIL
To: FIRST SOLAR, INC.
Reel/Frame 024986/0728 →