Tb(acac)(3　)(TAH)　and　Eu(TTA)(3)Phen　(ETP)　doped　polyacrylonitriles　(PAN)　have　been　electrospun　into　heterogeneous　hybrid　TAH/ETP/PAN　and　core-shell　structured　[(TAH/PAN)(core)　+　(ETP/PAN)(shell)]　wire-shaped　flexible　nanofibers　with　diameter　of　similar　to　350　nm.　Differential　photon　releasing　behaviors　reveal　the　double-color-emitting　potential　of　Tb-3(+)/Eu3+　combination　systems　and　verify　the　effectiveness　of　coaxial　configuration　in　avoiding　the　cross-relaxation　between　different　rare　earth　ions.　Luminous　fluxes　of　the　hybrid　and　the　coaxial　systems　exceed　283.5　and　326.3　mu　lm　under　the　excitation　of　308　nm　UVBLED　pump　source,　respectively.　By　adopting　coaxial　electrospun　configuration,　the　color　coordinates　are　tuned　from　(0.561,　0.332)　in　TAH/ETP/PAN　to　(0.435,　0.366)　in　[(TAH/PAN)(core)　+　(ETP/PAN)(shell)]　fibers,　which　demonstrates　that　the　core-shell　structure　is　promising　to　extend　the　dimension　of　color　tuning.　Nanofibrosis　and　electrospun　configurations　furnish　a　desired　approach　to　develop　multifunctional　one-dimensional　nanomaterials　for　color　displays　and　optoelectronic　sensors.　(C)　2019　Elsevier　B.V.　All　rights　reserved.