Performance of novel hyperbranched poly(aryl-ether-urea)s doped with N3-dye in nanocrystalline DSSC
Journal of Applied Polymer Science
Department of Polymer Science, University of Madras, Guindy Campus, Tamil Nadu, Chennai 25, India; PG and Research Department of Chemistry, D. G. Vaishnav College Tamil Nadu, Chennai 106, India; Chemical, Metallurgical and Material Engineering, Polymer Technology Division, Tshwane University of Technology, Pretoria, South Africa; Department of Energy, University of Madras, Guindy Campus, Tamil Nadu, Chennai 25, India
An amine-terminated hyperbranched poly(aryl-ether-urea) (HBPEU) was prepared from an AB2-type blocked isocyanate monomer and then its end groups were modified into urea (M-HBPEU) by reaction with phenyl isocyanate. Both of the polymers were doped with N3-dye along with KI/I2 to work as efficient polymer electrolytes in nanocrystalline dye sensitized solar cell. The increment in the conductivity of doped HBPEU and doped M-HBPEU was very significant and reached its value at 8.2 × 10-3 and 4.1 × 10-2 S/cm, respectively. The current-voltage (I-V) characteristics of these two doped polymers measured under simulated sunlight with AM 1.5 at 60 mW/cm2 generate photocurrent of 2.5 and 3.6 mA/cm2, together with a photo voltage of 690 and 750 mV, and fill factor of 0.55 and 0.61 yielding a overall energy conversion efficiency of 2.4% and 4.1%, respectively. These results suggest that M-HBPEU show better cell performance and conductance properties than the HBPEU. © 2014 Wiley Periodicals, Inc.
Conducting polymers; Energy conversion; Ethers; Monomers; Polyelectrolytes; Solar cells; Urea; Blocked isocyanates; Dye-sensitized solar cells; Hyperbranched; Ion-conducting polymers; Photovoltaic applications; Polymer electrolyte; Metabolism