Improved adhesion of interconnected TiO2 nanofiber network on conductive substrate and its application in polymer photovoltaic devices

The application of electrospun ceramic nanofibers is limited in electronic devices due to their poor adhesion on conductive substrates. In this regard, a simple method is developed by inserting an ultrathin surface treatment layer between TiO2 nanofiber mats and a conductive substrate to enhance interfacial adhesion. Polymer hybrid photovoltaic devices based on the TiO2 nanotibrous network were fabricated and investigated. Improved device performance was obtained by TiCl4 treatment and interfacial modification for the TiO2 nanofibers, as compared to those without any treatment. (C) 2008 American Institute of Physics.