%0 Journal Article %A T Zhang %A Yonghong Deng %A Stephen G Johnson %A Gao Liu %B Journal of Physics %D 2009 %G eng %P 5 %R 10.1088/0022-3727/42/14/145104 %T Highly efficient blue polyfluorene-based polymer light-emitting diodes through solvent vapor annealing %V 42