NOVELTY - A thin film solar cell (200) comprises a substrate (210); a first conductive layer (220) having first openings so that the first conductive layer is divided into bottom electrodes of photovoltaic elements (202); a photoelectric conversion layer (230); a second conductive layer (240); and a passivation layer (250) disposed on a sidewall of each second opening and between the photoelectric conversion layer and the second conductive layer.    USE - A thin film solar cell, e.g. copper indium gallium diselenide solar cell or cadmium telluride solar cell.    ADVANTAGE - In the thin film solar cell, the recombination of electron-hole pairs on the surface is reduced, thus a higher photoelectric conversion efficiency is achieved; and the short circuit current is increased and the leakage current is reduced, thus the photoelectric conversion efficiency and electric performance are improved.    DETAILED DESCRIPTION - A thin film solar cell (200) comprises:    (A) a substrate (210);    (B) a first conductive layer (220) having first openings so that the first conductive layer is divided into bottom electrodes of photovoltaic elements (202);    (C) a photoelectric conversion layer (230) disposed on the first conductive layer and having second openings to expose a portion of the first conductive layer;    (D) a second conductive layer (240) disposed on the photoelectric conversion layer and connected to the first conductive layer through the second openings; and    (E) a passivation layer (250) disposed on a sidewall of each second opening and between the photoelectric conversion layer and the second conductive layer.    The second conductive layer has third openings to expose a portion of the first conductive layer. The second conductive layer in the second openings is electrically isolated from the photoelectric conversion layer. An INDEPENDENT CLAIM is included for manufacture of thin film solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of a thin film solar cell.    Thin film solar cell (200)    Photovoltaic elements (202)    Substrate (210)    Conductive layers (220, 240)    Photoelectric conversion layer (230)    Passivation layer (250)