▎ 摘　　要

NOVELTY - The method involves preparing a surface of a flat wide gap semiconductor. A large energy gap semiconductor is contained with titanium dioxide. Graphene is transferred to the surface of the wide gap semiconductor. A light material layer is obtained. A solar battery is obtained. Mechanical polishing process is performed to polish a titanium oxide single-crystal substrate. Oxygen plasma etching process is performed. Chemical mechanical polishing process is performed to obtain a finished product. USE - Selective tunneling theory based solar battery preparation method. ADVANTAGE - The method enables greatly simplifying structure of a solar battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating a selective tunneling theory based solar battery preparation method.'(Drawing includes non-English language text)'