Solar cell, interface passivation material, photovoltaic power generation system, and electric device

A solar cell, comprising an interface passivation material, the interface passivation material comprising a first compound represented by chemical formula (1) and/or a second compound represented by chemical formula (2):

• wherein:
• Ar is an aromatic group;
• Q is a functional group containing active hydrogen;
• A+ is selected from an ammonium group or a phosphonium group;
• X− is selected from any one of a halogen ion, a pseudohalogen ion, an oxyanion ion, a fluoroanion ion, or a sulfonyl imide anion;
• and
• L1 to L5 are selected from any one of an alkylene chain with 0 to 10 carbon atoms, a halogen-substituted alkylene chain with 0 to 10 carbon atoms, a heteroatom-containing chain with 0 to 10 carbon atoms, a halogen-substituted heteroatom-containing chain with 0 to 10 carbon atoms, or a single heteroatom, wherein the heteroatom comprises one or more of a nitrogen atom, an oxygen atom, or a sulfur atom, and an alkylene chain with 0 carbon atoms indicates that two groups connected to L1 to L5 are directly connected.