NOVELTY - The thin-film solar cell comprises a photoelectric conversion structure (20), an anti-reflection coating stacked structure (10) located on the photoelectric conversion structure, a first electrode (30), and a second electrode (40). The anti-reflection coating stacked structure comprises a first anti-reflection coating layer (12) located on the photoelectric conversion structure, and a second anti-reflection coating layer (14) that is located on a portion of the first anti-reflection coating layer and formed in fractals. The photoelectric conversion structure comprises a first type substrate.    USE - Used as a thin-film solar cell.    ADVANTAGE - The thin-film solar cell can be economically fabricated with high quantum efficiency, improved performance, and less reflectivity.    DETAILED DESCRIPTION - The thin-film solar cell comprises a photoelectric conversion structure (20), an anti-reflection coating stacked structure (10) located on the photoelectric conversion structure, a first electrode (30), and a second electrode (40). The anti-reflection coating stacked structure comprises a first anti-reflection coating layer (12) located on the photoelectric conversion structure, and a second anti-reflection coating layer (14) that is located on a portion of the first anti-reflection coating layer and formed in fractals. The photoelectric conversion structure comprises a first type substrate comprising a first surface and a second surface, a second type doping layer located on the first surface, and a first type doping layer located on the second surface, where a doping concentration of the first type doping layer is higher than a doping concentration of the first type substrate. The anti-reflection coating stacked structure is located on the first and/or second surface. The first surface or the second surface has a textured surface. The photoelectric conversion structure is sandwiched between the first and second electrodes. A material of the second anti-reflection coating layer comprises a conductive material, and a non-conductive material. The fractals of the second anti-reflection coating layer comprise dentritics and/or three-dimensional networks. A thickness of the second anti-reflection coating layer is 1-1000 nm. A conformation of the first anti-reflection coating layer is a continuous layer. An INDEPENDENT CLAIM is included for an anti-reflection coating stacked structure.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a solar cell.    Anti-reflection coating stacked structure (10)    First anti-reflection coating layer (12)    Second anti-reflection coating layer (14)    Photoelectric conversion structure (20)    First electrode (30)    Second electrode. (40)