A new solvent-free composite polymer electrolyte consisting of poly(ethylene oxide) (PEO) incorporated into diphenyl amine (DPA) along with KI and I-2 has been developed. The current-voltage characteristics of this nanocrystalline dye-sensitized solar cell measured under simulated sunlight with 1.5 AM at 60 mW/cm(2) have indicated that this cell generates a photocurrent of 10.2 mA/cm(2). together with a photovoltage of 810 mV and fill factor of 0.47 yielding an overall energy conversion efficiency of 6.5%. This result suggests that the electron clonicity of DPA influences the interaction of nanocrystalline TiO2 electrode and I-/I-3(-) electrolyte, leading to a high performance of the fabricated solar cell. (C) 2008 Elsevier B.V. All rights reserved.