Efficient　and　low-cost　methods　for　obtaining　high　performance　flexible　transparent　electrodes　based　on　chemical　vapor　deposition　(CVD)-grown　graphene　are　highly　desirable.　In　this　work,　the　graphene　grown　on　copper　foil　was　exfoliated　into　micron-size　sheets　through　controllable　ultrasonication.　We　developed　a　clean　technique　by　blending　the　exfoliated　single　layer　graphene　sheets　with　conducting　polymer　to　form　graphene-based　composite　solution,　which　can　be　spin-coated　on　flexible　substrate,　forming　flexible　transparent　conducting　film　with　high　conductivity　(similar　to　8　Omega/square),　high　transmittance　(similar　to　81%　at　550　nm),　and　excellent　mechanical　robustness.　In　addition,　CVD-grown-graphene-based　polymer　light　emitting　diodes　with　excellent　bendable　performances　were　demonstrated.　(C)　2014　AIP　Publishing　LLC.