The use of 2,6-bis (N-pyrazolyl) pyridine as an efficient dopant in conjugation with poly(ethylene oxide) for nanocrystalline dye-sensitized solar cells

Poly(ethylene oxide) (PEO)/2,6-bis (N-pyrazolyl) pyridine (BNPP) polymer electrolyte based photoelectrochemical cells have been fabricated with [cis-dithiocyanato-N, N-bis (2,2 bipyridyl-4, 4 dicarboxylic acid)ruthenium(II)] dihydrate (N3 dye) dye complex as the sensitizer and nanoporous TiO2 film as photo anode. The introduction of 2,6-bis (N-pyrazolyl) pyridine into the poly (ethylene oxide) matrix reduces the crystallinity of the polymer and enhances the mobility of I−/I3− redox couple resulting in an improved performance with a higher conversion efficiency of 8.8% in terms of light energy to electric energy when compared to that of the corresponding dye-sensitized nanocrystalline TiO2 solar cell

Peformance of new polymer electrolyte incorporated with diphenylamine in nanocrystalline dye-sensitized solar cell

A new solvent-free composite polymer electrolyte consisting of poly(ethyleneoxide)(PEO)incorporated into diphenylamine(DPA)along with KI and I2 has been developed.The current–voltage characteristics of this nanocrystalline dye-sensitized solar cell measured under simulated sunlight with1.5AM at 60mW/cm2 have indicated that this cell generates a photocurrent of 10.2mA/cm2, together with a photovoltage of 810mV and fillfactor of 0.47 yielding an overall energy conversion efficiency of 6.5%.This result suggests that the electron donicity of DPA influences the interaction of nanocrystalline TiO2 electrode and I/I3 electrolyte,leading to a high performance of the fabricated solar cell

An investigation of the performance of a silver ionic solid electrolyte system for a new detergent-based nanocrystalline dye-sensitized solar cell

A new dye-sensitized solar cell containing a detergent-based solid-state composite electrolyte has been investigated. The electrolyte is composed of Triton-X (C16H26O2)n, with a powder mixture of surface-treated carbon powder, a fast ion-conducting material (FCM) 40(Cu1−xAgxI)−30(Ag2O)−30(WO3), (x=0.2), I−/I3− redox couple and an iodine complexing agent. The introduction of this detergent-based solid-state composite electrolyte forms a mosaic-like surface for the smooth transfer of photo-ejected electrons between electrodes. The current–voltage characteristics of TiO2 nanocrystalline dye-sensitized solar cells based on the above solid-state composite electrolyte measured under simulated sunlight with AM 1.5 at 40 mW/cm2 have revealed a short circuit current of 0.7 mA, open circuit voltage of 588 mV and fill-factor of 0.4, thus yielding an over-all conversion efficiency of 0.4%. These results have suggested the origin of appreciably, high charge transfer and the suppressed reverse reaction of electrons as due to the presence of the detergent dispersed with suspensions of electron- and ion-conducting phases