NOVELTY - A high-fluoride mix-crystal coating solar energy photovoltaic cell film backing comprises a structure of seven layers arranged orderly from top to bottom, namely base layer (1), high-fluoride mix-crystal coating (2), base layer (3), a polyethylene terephthalate (PET) layer (4), base layer (5), high-fluoride mix-crystal coating (6), and base layer (7). The PET layer is applied between the lower surface of layer (3) and upper surface of layer (5). A mixture of nano silicon carbide and nano aluminum nitride in any ratio is added to coatings (2,6).    USE - High-fluoride mix-crystal coating solar energy photovoltaic cell film backing.    ADVANTAGE - The high-fluoride mix-crystal coating solar energy photovoltaic cell film backing improves heat-dissipation efficiency of an assembly and further defers the degradation speed of power generation efficiency of the assembly, due to the presence of mixture of nano silicon carbide and nano aluminum nitride in the high fluoro-mix-crystal coating, which enhances the power generation capability of photovoltaic device. The assembly formed using the film backing meets performance requirements and works for over 30 years, stably, durably and effectively.    DETAILED DESCRIPTION - A high-fluoride mix-crystal coating solar energy photovoltaic cell film backing comprises a structure of seven layers arranged orderly from top to bottom, namely base layer (1), high-fluoride mix-crystal coating (2), base layer (3), a polyethylene terephthalate (PET) layer, base layer (5), high-fluoride mix-crystal coating (6), and base layer (7). Coating (2) is applied between the lower surface of layer (1) and upper surface of layer (3). Coating (6) is applied between the lower surface of layer (5) and upper surface of layer (7). The PET layer is applied between the lower surface of layer (3) and upper surface of layer (5). A mixture of nano silicon carbide and nano aluminum nitride in any ratio is added to coatings (2,6).    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the high-fluoride mix-crystal coating solar energy photovoltaic cell film backing.    Base layers (1,3,5,7)    High-fluoride mix-crystal coatings (2,6)    PET layer (4)    PET mix-crystal layer (A)    Nano-layer (B)    Flame-retardant layer (C)