We fabricated two types of solar cells based on poly(N-vinylcarbazole)(PVK) mixed with metalloporphyrin/Alq(3) p-n junction system and evaporated metalloporphyrin/Alq, p-n junction system. 5,10,15,20-tetra(o-nitro)phenylporphyrinatomagnesium (MgTNPP) was used as a photosensitizer and PVK was used as a hole transporter. Photovoltaic parameters (open circuit voltage (V-oc), short circuit current (J(sc)), fill factor (FF), and conversion efficiency (eta)) of ITO/PVK(MgTNPP)/Alq(3)/Al cell were calculated from the photocurrent-voltage characteristics.