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01-01-2015 | Issue 1/2015

Journal of Materials Science: Materials in Electronics 1/2015

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

Journal:
Journal of Materials Science: Materials in Electronics > Issue 1/2015
Authors:
Fan Yang, Qianli Ma, Xiangting Dong, Wensheng Yu, Jinxian Wang, Guixia Liu

Abstract

Europium complexes Eu(BA)3phen (BA = benzoic acid, phen = 1,10-phenanthroline) and Terbium complexes Tb(BA)3phen are incorporated into polyvinyl pyrrolidone (PVP) and electrospun into [Eu(BA)3phen + Tb(BA)3phen]/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 ± 3.14 nm. The obtained composite nanofibers are amorphous in structure and stable below 220 °C. By adjusting the ratio of Eu(BA)3phen to Tb(BA)3phen 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)3phen content. The novel color-tunable composite nanofibers have potential applications in the fields of optical devices, color displays and sensor systems.

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