NOVELTY - A thin film solar cell comprises a photo-luminescent medium (26) coated in solar cell and provided at a light incident surface of solar cell; transparent layer (21) stacked on photo-luminescent medium layer; front electrode layer (22) stacked on transparent layer; photoconductive layer (23) stacked on front electrode layer; and back electrode layer (24) stacked on photoconductive layer. The photo-luminescent medium layer is adapted for absorbing a part of an incident light having a relative short wavelength and then being excited to emit a light having a relative long wavelength.    USE - A thin film solar cell.    ADVANTAGE - When receiving the incident light, the photo-luminescent medium can be excited, thus improving a spectrum sensibility of photoconductive layer and achieving an improved photoelectric conversion efficiency.    DETAILED DESCRIPTION - A thin film solar cell comprises:    (1) photo-luminescent medium (26) coated in solar cell and provided at a light incident surface of solar cell;    (2) transparent layer (21) stacked on photo-luminescent medium layer;    (3) front electrode layer (22) stacked on transparent layer;    (4) photoconductive layer (23) stacked on front electrode layer; and    (5) back electrode layer (24) stacked on photoconductive layer.    The photo-luminescent medium layer is adapted for absorbing a part of an incident light having a relative short wavelength and then being excited to emit a light having a relative long wavelength, to improve a higher spectra response region of photoconductive layer and achieve an improved photoelectric conversion efficiency. An INDEPENDENT CLAIM is included for fabrication of thin film solar cell comprising providing an adhesive consisting of silica gel, silicone, epoxy or ethylene vinyl acetate.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a substrate-type solar cell having a photo-luminescent medium coated in it.    Transparent layer (21)    Front electrode layer (22)    Photoconductive layer (23)    Back electrode layer (24)    Photo-luminescent medium (26)