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Novel La2O2S:Eu3+ nanofibers fabricated from sulfurization of La2O3:Eu3+ electrospun nanofibers

FEI BI1, LIYAN WANG1,* , JIAQI LI2, GUANGQING GAI1, XIANGTING DONG2,*

Affiliation

  1. Laboratory of Building Energy-Saving Technology Engineering, College of Material Science and Engineering, Jilin Jianzhu University, Changchun 130118, China
  2. Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China

Abstract

La2O2S:Eu3+ nanofibers were successfully fabricated by electrospinning combined with a double-crucible sulfurization technique. X-ray powder diffraction (XRD) analysis indicated that La2O2S:Eu3+ nanofibers were pure hexagonal phase with space group P-3m1. Scanning electron microscope (SEM) analysis and histograms revealed that the mean diameter of La2O2S:Eu3+ nanofibers was 133.61±16.00 nm under the 95% confidence level. Photoluminescence (PL) analysis manifested that the La2O2S:Eu3+ nanofibers emitted red emission at 624 nm attributed to 5D0→7F2 energy levels transition of Eu3+ ions under the excitation of 264 nm ultraviolet light. It was found that the optimum molar ratio of Eu3+ ions was 5%. CIE analysis demonstrated that the emitting colors of La2O2S:Eu3+ nanofibers were located in the yellow and red regions and color-tuned luminescence can be obtained by changing doping concentration of Eu3+ ions, which could be applied in the field of optical telecommunication and optoelectronic devices. The possible formation mechanism of La2O2S:Eu3+ nanofibers were also proposed..

Keywords

Lanthanum oxysulfide, Luminescence, Nanofibers, Electrospinning.

Citation

FEI BI, LIYAN WANG, JIAQI LI, GUANGQING GAI, XIANGTING DONG, Novel La2O2S:Eu3+ nanofibers fabricated from sulfurization of La2O3:Eu3+ electrospun nanofibers, Optoelectronics and Advanced Materials - Rapid Communications, 14, 3-4, March-April 2020, pp.177-183 (2020).

Submitted at: July 11, 2019

Accepted at: April 9, 2020