Abstract
A process of manufacturing the interdigitated back-contact solar cell, with the use of screen printing or spraying and the use of chemical etching, forms the trenches for the P-type electrode on the back of the substrate for making the solar cell. The time-consuming process of photolithography (for example, at least two steps of high-temperature diffusion) can be avoided. Furthermore, only one machine for printing and etching is needed to form the structure of the interdigitated back-contact solar cell. The present invention can make the whole process time-efficient and low-cost to enhance the efficiency of the solar cell, fulfilling the demand of mass production.