Film structure for crystalline silicon solar cell, crystalline silicon solar cell, photovoltaic module and photovoltaic system

The utility model relates to the field of photovoltaic technology, and discloses a film layer structure for a crystalline silicon solar cell, the crystalline silicon solar cell, a photovoltaic assembly and a photovoltaic system, the film layer structure comprises a crystalline silicon substrate, the front surface of the crystalline silicon substrate is provided with a carrier selective layer and a hydrogen content regulation structure in sequence, and the carrier selective layer is provided with a carrier electrode. A carrier selective layer and a hydrogen content regulation and control structure are sequentially arranged on the rear surface of the crystalline silicon substrate; the carrier selective layer is of a homogeneous structure or a passivation contact structure, and the conduction type of the carrier selective layer is N type or P type; the hydrogen content regulation and control structure comprises a first hydrogen barrier layer for regulating and controlling the content of hydrogen entering the car