Numerical model for planar heterojunction organic solar cells on the condition of short circuit

The effects of the incident light intensity, the thicknesses of the donor and acceptor layers on the short-circuit current density, the distributions of carrier density, electric field and electric potentials of planar heterojunction organic solar cells were numerically studied. The results show that the short-circuit current density increases with the light intensity, and will saturate when the light intensity is sufficiently strong, the short-circuit current density first increases and then decreases with the thickness of the donor layer for a given thickness of the acceptor layer, and deceases with the acceptor thickness for a given thickness of the donor layer.