NOVELTY - A thin film solar cell comprises first substrate (210); a first conductive layer (220) disposed on first substrate and located in active area; an photovoltaic layer (230) disposed on first conductive layer and located in active area; second conductive layer (240) disposed on photovoltaic layer and located in active area; first passivation layer (250) disposed on second conductive layer and located in active area; and second passivation layer (260) disposed on a peripheral of photovoltaic layer and located in dead area to avoid the photovoltaic layer contacting moisture in air.    USE - As thin film solar cell (claimed).    ADVANTAGE - The thin film solar cell avoids infiltration of moisture in air and has a good electrical property.    DETAILED DESCRIPTION - A thin film solar cell has active area and dead area comprises a first substrate (210); a first conductive layer (220) disposed on the first substrate and located in the active area; an photovoltaic layer (230) disposed on the first conductive layer and located in the active area; a second conductive layer (240) disposed on the photovoltaic layer and located in the active area; a first passivation layer (250) disposed on the second conductive layer and located in the active area; and a second passivation layer (260) disposed on a peripheral of the photovoltaic layer and located in the dead area to avoid the photovoltaic layer contacting moisture in air. The thin film solar cell further comprises second substrate (280) and an adhesion layer (270). An INDEPENDENT CLAIM is included for fabrication method of a thin film solar cell involving providing a first substrate; forming a first conductive layer on the first substrate; forming an photovoltaic layer on the first conductive layer; forming a second conductive layer on the photovoltaic layer; forming a first passivation layer on the second conductive layer; removing a portion of the first conductive layer, a portion of the photovoltaic layer, a portion of the second conductive layer, and a portion of the first passivation layer located on a peripheral of the first substrate to define an active region and a dead area on the first substrate; and forming a second passivation layer located in the dead area to cover a peripheral of the photovoltaic layer to avoid the photovoltaic layer contacting moisture in air.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of thin film solar cell.    first substrate (210)    first conductive layer (220)    photovoltaic layer (230)    Second conductive layer (240)    First passivation layer (250)    Second passivation layer (260)