Patent ID: 7879644

Claim:
A method for manufacturing a solar cell comprising the steps of: (i) providing a transparent substrate; (ii) depositing a transparent conducting oxide layer on the transparent substrate; (iii) depositing a second sub-p-layer on the transparent conducting oxide layer at a second temperature; (iv) depositing a first sub-p-layer on the second sub-p-layer at a first temperature that is different from the second temperature; (v) depositing an i-layer on the first sub-p-layer; and (vi) depositing a n-type layer on the i-layer wherein the second sub-p-layer is deposited onto the transparent conducting oxide layer at about 70° C. and at a thickness in the range of about 0.005 microns to about 0.02 microns, and wherein the first sub-p-layer is deposited onto the second sub-p-layer at about 140° C. and at a thickness in the range of about 0.001 microns to about 0.004 microns.