Solar cell using low iron high transmission glass with antimony and corresponding method
AssigneeGuardian Industries Corp.
InventorsScott V. Thomsen, Ksenia A. Landa, Richard Hulme, Anthony V. Longobardo, Leonid Landa, Anna Broughton
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Abstract
A high transmission and low iron glass is provided for use in a solar cell. The glass substrate may be patterned on at least one surface thereof. Antimony (Sb) is used in the glass to improve stability of the solar performance of the glass upon exposure to ultraviolet (UV) radiation and/or sunlight. The combination of low iron content, antimony, and/or the patterning of the glass substrate results in a substrate with high visible transmission and excellent light refracting characteristics.
Claims24
A solar cell comprising:
- a patterned glass substrate, wherein at least one surface of the patterned glass substrate has a surface roughness of from about 0.1 to 1.5 μm;
- first and second conductive layers with at least a photoelectric film provided therebetween;
- wherein the glass substrate is of a composition comprising:
- Ingredient
- wt. %
- SiO2
- 67-75%
- Na2O
- 10-20%
- CaO
- 5-15%
- total iron (expressed as Fe2O3)
- 0.001 to 0.06%
- cerium oxide
- 0 to 0.07%
- antimony oxide
- 0.01 to 1.0%
- wherein the glass substrate has a glass redox of <=0.10, a visible transmission of at least 90%, a transmissive a* color value of −1.0 to +1.0 and a transmissive b* color value of from 0 to +1.5.
A solar cell comprising:
- a glass substrate;
- a photoelectric film supported by at least the glass substrate;
- wherein the glass substrate is of a composition comprising:
- Ingredient
- wt. %
- total iron (expressed as Fe2O3)
- 0.01 to 0.06%
- antimony oxide
- 0.01 to 0.5%
- wherein the glass substrate has a glass redox of <=0.10, a visible transmission of at least 90%, a transmissive a* color value of −1.0 to +1.0 and a positive transmissive b* color value.
A glass substrate comprising:
- Ingredient
- wt. %
- SiO2
- 67-75%
- Na2O
- 10-20%
- CaO
- 5-15%
- total iron (expressed as Fe2O3)
- 0.001 to 0.06%
- cerium oxide
- 0 to 0.07%
- antimony oxide
- 0.01 to 1.0%
- wherein the glass substrate has a glass redox of <=0.06, contains from 0.001-0.0025% FeO, has a visible transmission of at least 90%, a transmissive a* color value of −1.0 to +1.0 and a transmissive b* color value of from 0 to +1.5, and is substantially free of other colorants.
Dependencies are inferred from the claim text.