NOVELTY - Composite film solar battery taking microcrystalline silicon layer as incident layer comprises transparent conductive layer, microcrystalline silicon hole-transmission layer, dye-sensitized nanocrystalline porous film, and conductive substrate. The dye-sensitized nanocrystalline porous film is dye-absorbed nanocrystalline porous film. The microcrystalline silicon hole-transmission layer is deposited on dye-sensitized nanocrystalline porous film to form dye-sensitized nanocrystalline-microcrystalline silicon composite film.    USE - Composite film solar battery used for converting light energy into electrical energy.    ADVANTAGE - Since the dye-sensitized nanocrystalline material and microcrystalline silicon composite film material are directly prepared on conductive substrate, the battery overcomes the defects of prior art dye-sensitized solar battery, which has dependency on transparent conductive glass, low preparation speed causing high preparation cost, and poor liquid stability.    DETAILED DESCRIPTION - Composite film solar battery taking microcrystalline silicon layer as incident layer comprises transparent conductive layer, microcrystalline silicon hole-transmission layer, dye-sensitized nanocrystalline porous film, and conductive substrate. The transparent conductive layer is zinc aluminum oxide conductive layer, indium tin oxide (ITO) conductive layer, or fluorine-doped tin oxide (SnO2) conductive layer. The dye-sensitized nanocrystalline porous film is dye-absorbed nanocrystalline porous film. The microcrystalline silicon hole-transmission layer has energy level matching with the dye absorbed in dye-sensitized nanocrystalline porous film. The conductive substrate is titanium sheet, aluminum sheet, copper sheet, steel sheet plated with titanium metal layer on surface, steel sheet plated with aluminum metal layer on surface, steel sheet plated with copper metal layer on surface, glass substrate plated with titanium metal layer on surface, glass substrate plated with aluminum layer on surface, glass substrate plated with copper metal layer on surface, ceramic substrate plated with titanium metal layer on surface, ceramic substrate plated with aluminum layer on surface, or ceramic substrate plated with copper metal layer on surface. The dye-sensitized nanocrystalline porous film is coated on conductive substrate. The microcrystalline silicon hole-transmission layer is deposited on dye-sensitized nanocrystalline porous film to form dye-sensitized nanocrystalline-microcrystalline silicon composite film. The transparent conductive layer is deposited on microcrystalline silicon hole-transmission layer. An INDEPENDENT CLAIM is included for preparation of composite film solar battery.