NOVELTY - The backsheet (10) comprises a fluororesin, and 2-30 wt.% of encapsulated particles dispersed in the fluororesin. Each of the encapsulated particles comprises: a core particle comprising 97 wt.% of titanium dioxide; a metal oxide layer that is disposed about the core particle and comprises 0.5-2.9 wt.% of aluminum oxide; and an organic protective layer disposed about the metal oxide layer with the organic protective layer formed from 0.1-1 pts. wt. of organic compound. The backsheet has an average thickness of 12-100 mu m.    USE - The backsheet is useful in a photovoltaic cell module (claimed).    ADVANTAGE - The backsheet can be economically manufactured with excellent electrical insulation properties, moisture barrier properties, longevity, optical stability, thermal stability, photocatalytic stability, UV light transmittance and color stability, high resistance to weather and heat and improved surface roughness.    DETAILED DESCRIPTION - The backsheet (10) comprises a fluororesin, and 2-30 wt.% of encapsulated particles dispersed in the fluororesin. Each of the encapsulated particles comprises: a core particle comprising 97 wt.% of titanium dioxide; a metal oxide layer that is disposed about the core particle and comprises 0.5-2.9 wt.% of aluminum oxide; and an organic protective layer disposed about the metal oxide layer with the organic protective layer formed from 0.1-1 pts. wt. of organic compound. The backsheet has an average thickness of 12-100 mu m, an UV light transmittance, at a wavelength of 360 nm, of less than 0.03%, and a weight retention rate at 400 degrees C of 99.2% when the encapsulated particles are present in the backsheet in an amount of 25 wt.%. The encapsulated particles have an average particle size of 0.1-0.4 mu m. An INDEPENDENT CLAIM is included for a photovoltaic cell module.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a photovoltaic cell module.    Backsheet (10)    Encapsulant layer (24, 28)    Photovoltaic cell (26)    Coversheet (30)    Tabbing ribbon. (32)