Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (03): 50-57.doi: 10.13475/j.fzxb.20210107408

• Fiber Materials • Previous Articles     Next Articles

Preparation and fluorescence enhancement mechanism of bonded polymer fluorescence fibers

ZHANG Aiqin1,2,3(), HAO Jiacheng1,3, WANG Zhi1,3, WANG Yongchao1,3, LIU Shuqiang1, DONG Hailiang3, JIA Husheng3, XU Bingshe3   

  1. 1. College of Textile Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030006, China
    2. Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, Shanxi 030024, China
    3. Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
  • Received:2021-01-29 Revised:2021-11-26 Online:2022-03-15 Published:2022-03-29

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Abstract:

In order to further improve the luminescence efficiency of bonded terbium polymer phosphors, the bonded phosphors poly(MMA-co-Tb(4-BBA)3(4-VP)2-co-NVK) were prepared by copolymerization with the complex Tb(4-BBA)3(4-VP)2, N-vinylcarbazole (NVK) and methyl methacrylate (MMA) employing the technology of pre-coordination and post-polymerization, and the corresponding green fluorescence fibers were prepared by electrospinning. The structure and properties of the phosphors and fibers were characterized. The results exhibit that the fluorescence fibers with different content of the complex Tb(4-BBA)3(4-VP)2 show bright green emission excited by light with 365 nm wave length. The fibers have smooth surface and uniform diameter. The fluorescenct intensity and micro-morphology of the fluorescence fibers in the same trend as the complex content, which establishes the internal relationship between the micro-morphology and fluorescent intensity of fibers. The fluorescent intensity of the fibers is 1.6 times higher than that of the corresponding phosphors, reaching the maximum at 14% of the complex Tb(4-BBA)3(4-VP)2 content. The brightness of LED devices fabricated with nanofiber membrane reaches 24 390 cd/m2, which is 2.6 times that of LEDs made using the conventional coating methods.

Key words: terbium, phoshor, electrospinning, fluorescence fiber, fluorescence enhancement mechanism

CLC Number: 

  • TQ342.8

Fig.1

Synthetic routes of bonded polymer phosphors PMNTb"

Fig.2

FT-IR spectra of bonded polymer phosphors and complex"

Fig.3

UV-vis absorption spectra of complex and bonded polymer phosphors"

Fig.4

Influence of spinning solution mass fraction on morphology of F-PMN matrix fibers"

Fig.5

Influence of complex mass fraction on morphology of fluorescent fibers"

Fig.6

Relationship between F-PMNTb fluorescence fibers diameter and complex mass fraction"

Fig.7

TG-DTG curves of bonded polymer phosphors PMNTb(a) and its fluorescence fibers(b)"

Fig.8

Fluorescence emission spectra(a) of fluorescent fibers with different complex mass fraction and relationship between luminescent intensity of bonded fluorescence fibers and complex mass fraction(b)"

Fig.9

Fluorescence emission spectra of phosphors and fluorescence fibers"

Fig.10

Fluorescence enhancement mechanism of F-PMNTb fluorescence fibers"

Fig.11

Fluorescence decay curves of phosphors(a) and fluorescence fibers(b)"

Fig.12

Electroluminescence spectra(a), its CIE chromaticity coordinates (b)and luminance-voltage curves(c)of FM-LED, ETFM-LED and EQFM-LED"

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