Inks and pastes for solar cell fabricaton
AssigneeApplied Nanotech Holdings, Inc.
InventorsYunjun Li, Peter B. Laxton, James Novak, David Max Roundhill
Life of this patent
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Abstract
A silicon solar cell is formed with an N-type silicon layer on a P-type silicon semiconductor substrate. An antireflective and passivation layer is deposited on the N-type silicon layer, and then an aluminum ink composition is printed on the back of the silicon wafer to form the back contact electrode. The back contact electrode is sintered to produce an ohmic contact between the electrode and the P-type silicon layer. The aluminum ink composition may include aluminum powders, a vehicle, an inorganic polymer, and a dispersant. Other electrodes on the solar cell can be produced in a similar manner with the aluminum ink composition.
Claims19
An aluminum ink composition for making an electrode in a silicon solar cell comprising aluminum powders, a vehicle, an inorganic polymer, and a dispersant.
A method for making a silicon solar cell comprising:
- forming an N-type silicon layer on a P-type silicon semiconductor substrate;
- depositing an antireflective and passivation layer on the N-type silicon layer;
- printing an aluminum ink composition on a back of the silicon semiconductor substrate to form a back contact electrode;
- and
- sintering the back contact electrode to produce an ohmic contact between the back contact electrode and the P-type silicon semiconductor substrate.
A molybdenum ink composition for making an electrode in a CIGS solar cell comprising molybdenum nanopowders, a vehicle, and a dispersant.
Dependencies are inferred from the claim text.