Formation of Nanopatterned Polymer Blends in Photovoltaic Devices

We demonstrate a double nanoimprinting process that allows the formation of nanostructured polymer heterojunctions of composition and morphology that can be selected independently

Ximin He; Feng Gao; Guoli Tu; David Hasko; Sven Hüttner; Ullrich Steiner; Neil C. Greenham; Richard H. Friend; Wilhelm T. S. Huck

2010

Scholarcy highlights

  • In this paper, we demonstrate a double nanoimprinting process that allows the formation of nanostructured polymer heterojunctions of composition and morphology that can be selected independently
  • It should be noted that our method is rather different from initial reports in the literature on PV devices containing imprinted P3HT
  • We have shown that this novel imprinting method produces the best performance yet reported for a polymer-polymer system and this improvement results primarily through the improved fill factor over that obtained for solution demixed devices
  • We consider that this is due to the avoidance of locally trapped photogenerated charges due to the poorly controlled morphology formed from the demixed polymer blend
  • There is considerable room for improvement in power conversion efficiency if the device thickness can be increased while retaining efficient charge separation and collection
  • Our work indicates that charge separation at polymer-polymer heterojunctions can be effective to polymerfullerene systems, and demonstrates that there is scope to find a broader range of electron acceptors beyond the widely used fullerenes that can provide high PV efficiency when the heterojunction morphology is controlled appropriately

Need more features? Save interactive summary cards to your Scholarcy Library.