The crystalline silicon products are mainly classified by single-crystal silicon and poly-crystalline silicon. The efficiency of single-crystal silicon is better, and the module efficiency of the lab chip is up to 24%, while the module efficiency of the commercially available modules is between 15%~16%. Besides, the poly-crystalline silicon’s module efficiency of the lab chip is up to 18%, while the module efficiency of the commercially available modules is near 14%. Therefore, photovoltaic panel of the poly-crystalline silicon is bigger than that of single-crystal silicon with same power generation.