POLY-SILOXANE CONTAINING ORGANIC VEHICLE FOR ELECTROCONDUCTIVE PASTES
First Claim
1. A passivated emitter rear solar cell, comprising:
- a silicon substrate having a front and back surface;
a rear passivation layer on the back surface of the silicon substrate having a plurality of open holes formed therein;
an aluminum back contact layer formed in the open holes of the rear passivation layer; and
at least one backside soldering tab on the back surface of the silicon substrate,wherein the backside soldering tab is formed from an electroconductive paste composition comprising conductive metallic particles, at least one lead-free glass frit, and an organic vehicle comprising at least one silicone oil.
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Abstract
The invention relates to a passivated emitter rear solar cell, comprising a silicon substrate having a front and back surface, a rear passivation layer on the back surface of the silicon substrate having a plurality of open holes formed therein, an aluminum back contact layer formed in the open holes of the rear passivation layer, and at least one backside soldering tab on the back surface of the silicon substrate. The backside soldering tab is formed from an electroconductive paste composition comprising conductive metallic particles, at least one lead-free glass frit, and an organic vehicle comprising at least one silicone oil.
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Citations
20 Claims
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1. A passivated emitter rear solar cell, comprising:
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a silicon substrate having a front and back surface; a rear passivation layer on the back surface of the silicon substrate having a plurality of open holes formed therein; an aluminum back contact layer formed in the open holes of the rear passivation layer; and at least one backside soldering tab on the back surface of the silicon substrate, wherein the backside soldering tab is formed from an electroconductive paste composition comprising conductive metallic particles, at least one lead-free glass frit, and an organic vehicle comprising at least one silicone oil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of preparing a passivated emitter rear solar cell, comprising the steps of:
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(i) applying a backside electroconductive paste composition to a rear surface of a silicon substrate having at least one rear passivation layer formed thereon, the rear passivation layer having a plurality of open holes formed therein to expose areas of the silicon substrate; (ii) applying an aluminum electroconductive paste composition in the open holes of the rear passivation layer to contact the silicon substrate; and (iii) heating the silicon substrate, wherein the backside electroconductive paste composition comprises conductive metallic particles, at least one lead-free glass frit, and an organic vehicle comprising at least one silicone oil. - View Dependent Claims (17, 18, 19, 20)
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Specification