Process for making solar panel and the solar panel made thereof

A process for making a flexible solar panel comprising the steps of:

• (a) providing a substrate with patterned first electrodes thereon;
• (b) sequentially depositing a layer of a first material and a layer of a second material on the substrate with patterned first electrodes;
• (c) forming a plurality of patterned photoresists on the layer of the second material and at a plurality of conductive channels;
• (d) wet etching the layer of the first material and the layer of the second material to form a plurality of T-shaped structures at the conductive channels, wherein the etching rate for the first material is higher than that for the second material;
• (e) depositing at least a semiconductor film on the substrate with the patterned first electrodes to form photoelectrical conversion elements;
• (f) depositing at least one second electrode on the semiconductor film, so as to electrically connect the second electrodes to the first electrodes at the conductive channels;
• and
• (g) scribing the second electrodes and semiconductor film to separate individual cell to form a solar panel.