Energy transfer from polyfluorene based polymer to europium complex P. K. Kristensen, T. G. Pedersen, Kaizheng Zhu and Donghong Yu Eur. Phys. J. Appl. Phys., 37 1 (2007) 57-59 Published online: 13 December 2006 DOI: 10.1051/epjap:2006154