NOVELTY - The thin film solar cell comprises a substrate (310), a first transparent conductive layer (320) disposed on the substrate, a photoelectric conversion layer disposed on the first conductive layer, a second transparent conductive layer (340) disposed on the photoelectric conversion layer, a passivation layer (350) disposed on a sidewall of second openings of the conversion layer and between the conversion layer and the second conductive layer so that the second conductive layer in the second openings is electrically isolated from the photoelectric conversion layer, and a blocking material.    USE - Used as a thin film solar cell such as an amorphous silicon-, a microcrystalline silicon-, a tandem-, a triple-, a copper indium diselenide-, a copper indium gallium diselenide-, a gadolinium telluride- or an organic thin film solar cells.    ADVANTAGE - The thin film solar cell has improved photoelectric conversion efficiency, increased short circuit current and shunt resistance, reduced leakage current, and excellent electric performance, can be simply manufactured with less number of processing steps, and reduces the recombination of electron-hole pairs on its surface.    DETAILED DESCRIPTION - The thin film solar cell comprises a substrate (310), a first transparent conductive layer (320) disposed on the substrate, a photoelectric conversion layer disposed on the first conductive layer, a second transparent conductive layer (340) disposed on the photoelectric conversion layer, a passivation layer (350) disposed on a sidewall of second openings of the conversion layer and between the conversion layer and the second conductive layer so that the second conductive layer in the second openings is electrically isolated from the photoelectric conversion layer, and a blocking material filling in the third openings and covering the first conductive layer and the side surface of the photoelectric conversion layer. The first conductive layer has first openings (322) so that the first conductive layer is divided into bottom electrodes of photovoltaic elements. The second openings expose a portion of the first conductive layer. The photoelectric conversion layer is physically connected to the substrate through the first openings, and comprises a group IV thin film, a III-V compound semiconductor thin film, a II-VI compound semiconductor thin film or an organic compound semiconductor thin film. The second conductive layer is physically connected to the first conductive layer through the second openings, and has third openings to expose a portion of the first conductive layer and a portion of a side surface of the photoelectric conversion layer. The third openings and a portion of the second openings are disposed at the same positions. The passivation layer is an organic passivation layer or an insulating passivation layer, has a thickness of 1-5 nm, and comprises a solid solute, a liquid solvent, and a solids content of greater than 30%. A material of the passivation layer comprises a dielectric material, an insulating material, a compound material containing oxygen or nitrogen, and reflective material, which is a lead paint or a metal. The photoelectric conversion layer comprises a first-type semiconductor layer and a second-type semiconductor layer, a double-layer photoelectric conversion layer, a triple-layer photoelectric conversion layer or a stacked structure of more than three photoelectric conversion layers. The first and second conductive layers comprise a reflective layer and/or a transparent conductive layer. The blocking material comprises an insulating material comprising an inorganic material or an organic material. An INDEPENDENT CLAIM is included for a manufacturing method of a thin film solar cell.    DESCRIPTION OF DRAWING(S) - The diagram shows a cross-sectional view of a thin film solar cell.    Substrate (310)    First conductive layer (320)    First opening (322)    Photovoltaic layer (330)    Second conductive layer (340)    Passivation layer. (350)