Abstract: To provide a perovskite solar cell having a high conversion efficiency. An organic-inorganic hybrid material applicable to a perovskite solar cell having a first electrode, an electron transport compound layer arranged on the first electrode, a perovskite compound layer arranged on the electron transport compound layer, a hole transport layer arranged on the perovskite compound layer, and a second electrode arranged on the hole transport layer, the organic-inorganic hybrid material comprising a compound represented by “KxA1yA2zPbX1pX2q”. Wherein, K represents potassium, Pb represents lead, A1 and A2 represent freely selectable cations, which may be organic or inorganic, and may be same; X1 and X2 represent halogen atoms, which may be same; x represents a numerical value ranging from 0.01 to 0.20; and y, z, p and q represent freely selectable numerical values which satisfy x+y+z=1 and p+q=3.