NOVELTY - Encapsulated device comprises a photovoltaic cell and a composite film overlaying at least a portion of the photovoltaic cell. The composite film further comprises: a substrate (12); a base (co)polymer layer (14) on a major surface of the substrate; an oxide layer (16) on the base (co)polymer layer; and a protective (co)polymer layer (18) on the oxide layer. The protective (co)polymer layer comprises the reaction product of at least one of urea (multi)-(meth)acrylate (multi)-silane precursor compounds (I), (V) or (VIII)-(XI).    USE - The encapsulated device is useful as a photovoltaic device.    ADVANTAGE - The encapsulated device: exhibits superior mechanical properties such as elasticity and flexibility yet still have low oxygen or water vapor transmission rates; does not exhibit delamination or curl that can arise from thermal stresses or shrinkage in a multilayer structure; exhibits improved moisture resistance; and utilizes the composite film which is flexible, lightweight and durable over glass and enables low cost continuous roll-to-roll processing.    DETAILED DESCRIPTION - Encapsulated device comprises a photovoltaic cell and a composite film overlaying at least a portion of the photovoltaic cell. The composite film further comprises: a substrate (12); a base (co)polymer layer (14) on a major surface of the substrate; an oxide layer (16) on the base (co)polymer layer; and a protective (co)polymer layer (18) on the oxide layer. The protective (co)polymer layer comprises the reaction product of at least one of urea (multi)-(meth)acrylate (multi)-silane precursor compounds of formula (I), (V) or (VIII)-(XI).    R1s = silane containing group of formula (II);    R1 = multivalent alkylene, arylene, alkarylene or aralkylene (all optionally contained at least one catenary oxygen atom);    Y1 = hydrolyzable group which is alkoxy, acetate, aryloxy or halo, where at least some of the hydrolyzable groups are alkoxy or Cl;    R2 = monovalent alkyl or aryl;    p = 1-3;    q = 1-5;    R1a = (meth)acryl containing group of formula (III);    R11 = polyvalent alkylene, arylene, alkarylene or aralkylene (all optionally contained at least one catenary oxygen atom);    A1 = (meth)acryl containing group of formula (IV);    X2 = -O, -S or -NR3;    R3 = H or group containing 1-4C;    n = 1-5;    R5 = H, 1-6C alkyl, cycloalkyl or R1s;    R2s = silane containing group of formula (VI);    R4 = H, 1-6C alkyl or 1-6C cycloalkyl;    R2a = (meth)acryl containing group of formula (VII); and    R1d, R11d = divalent alkylene, arylene, alkarylene or aralkylene (all optionally contained at least one catenary oxygen atom).    Provided that in the structure (I), at least one of n and q are 2-5, or R5 is R1s.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a photovoltaic device including a moisture-resistant barrier film having a vapor-deposited adhesion-promoting coating.    Barrier film (10)    Substrate (12)    Base (co)polymer layer (14)    Oxide layer (16)    Protective (co)polymer layer (18)