Room-temperature preparation of crystalline TiO2 thin films and their applications in polymer/TiO2 hybrid optoelectronic devices Article

Wu, CH, Li, H, Fong, HH et al. (2011). Room-temperature preparation of crystalline TiO2 thin films and their applications in polymer/TiO2 hybrid optoelectronic devices . 12(6), 1073-1079. 10.1016/j.orgel.2011.03.004

cited authors

  • Wu, CH; Li, H; Fong, HH; Pozdin, VA; Estroff, LA; Malliaras, GG

authors

abstract

  • Highly homogeneous crystalline TiO2 thin films with very low surface roughness were prepared by spin-coating of a TiO2 nanoparticle aqueous dispersion at room temperature without further heat treatment. Using these films as electron transporting layers, inverted structure hybrid photovoltaic cells (TiO2/P3HT) and light-emitting diodes (TiO2/F8BT) were demonstrated. The photovoltaic cells exhibited an energy conversion efficiency of 0.26%, which is similar to that of cells utilizing TiO2 layers sintered at high temperatures. Moreover, the light-emitting diodes showed an efficiency of 0.65 cd/A, which is higher than obtained from a reference inverted diode (0.1 cd/A). These measurements demonstrate that a properly designed nanoparticle casting route can help avoid high temperature crystallization or sintering steps for TiO2 thin films, paving the road for their use in conjunction with plastic substrates. © 2011 Elsevier B.V. All rights reserved.

publication date

  • January 1, 2011

Digital Object Identifier (DOI)

start page

  • 1073

end page

  • 1079

volume

  • 12

issue

  • 6