A novel scheme to obtain tunable fluorescent colors based on electrospun composite nanofibers

作者：Yang Fan; Ma Qianli; Dong Xiangting^*; Yu Wensheng; Wang Jinxian; Liu Guixia

来源：Journal of Materials Science: Materials in Electronics , 2015, 26(1): 336-344.

DOI：10.1007/s10854-014-2405-1

Europium complexes Eu(BA)(3)phen (BA = benzoic acid, phen = 1,10-phenanthroline) and Terbium complexes Tb(BA)(3)phen are incorporated into polyvinyl pyrrolidone (PVP) and electrospun into [Eu(BA)(3)phen + Tb(BA)(3)phen]/PVP composite nanofibers. The morphologies and properties of the final products are investigated via scanning electron microscopy, energy dispersive spectrometry,X-ray powder diffractometry, fluorescence spectroscopy, Fourier-transform infrared spectroscopy and thermogravimetry. The diameter of the composite nanofibers is 431.55 +/- A 3.14 nm. The obtained composite nanofibers are amorphous in structure and stable below 220 A degrees C. By adjusting the ratio of Eu(BA)(3)phen to Tb(BA)(3)phen complexes, the fluorescence color of composite nanofibers can be tuned from red to yellow, yellow green, and green under the excitation of 276-nm single-wavelength ultraviolet light. Besides, the fluorescence lifetime of Eu3+ ions in composite nanofibers is extended gradually, while that of Tb3+ ions is decreased slowly with increase of Tb(BA)(3)phen content. The novel color-tunable composite nanofibers have potential applications in the fields of optical devices, color displays and sensor systems.

• 出版日期2015-1
• 单位长春大学