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Thin film photovoltaic cells have the advantages of light weight, light weight and good flexibility. They are widely used in photovoltaic building integration. If the efficiency of the thin film battery module is almost the same as that of the crystalline silicon cell, its cost performance will be unparalleled. The thin film battery prepared on the flexible substrate has the advantages of curly folding, no shooting, light weight, good weak light, and so on. The future application prospect will be broader.

At present, the conversion rate of amorphous silicon thin film is about 9%. The conversion rate of amorphous silicon is expected to be higher. After the installation of crystalline silicon PV modules, exposure to 50 - 100 days, the efficiency decays about 2 - 3%, and then the attenuation amplitude slowed down significantly and steadily decreased by 0 per year. 5 - 0. 8%, the decay of 20 years is about 20%. The attenuation of single crystal components is less than that of polycrystalline components. The attenuation of amorphous optical components is less than crystalline silicon.

Therefore, upgrading the conversion rate and reducing the cost per watt will remain the two major themes of PV development in the future. In any way, large-scale applications can raise the conversion rate to 30%, with a cost of less than five thousand yuan per kilowatt (and water and electricity), and then people will get the most widely, cleanest, and cheapest, almost unlimited new energy before the success of nuclear fusion research.