Differentiation of photon generation depended on electrospun configuration in Eu3+/Tb3+ doped polyacrylonitrile nanofibers

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.