Tunable white light emission by variation of composition and defects of electrospun Al2O3–SiO2 nanofibers

Beilstein Journal of Nanotechnology

Gengzhi Sun¹  Yujun Fu²  Xiaojun Pan²  Erqing Xie²  Zhenxing Zhang²  Jinyuan Zhou²  Hao Zhao²  Yanzhe Mao² 

[1] School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore;School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, People’s Republic of China,;

关键词: Al2O3–SiO2;    defects;    electrospinning;    nanofibers;    photoluminescence;    white light emission;   

DOI  :  10.3762/bjnano.6.29

来源: DOAJ

【 摘 要 】

Composite nanofibers consisting of Al2O3–SiO2 were prepared by electrospinning in combination with post-calcination in air. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy were used to investigate the crystalline phase and microstructure of the composite nanofibers. Photoluminescence experiments indicated that the resulting white light emission can be tuned by the relative intensity of the individual spectral components, which are related to the individual defects such as: violet-blue emission from O defects, green emission from ≡Si(Al)–O–C∙=O, and red emission from intersystem radiative crossing. White light emission was realized at a Al/(Al–Si) ratio of 40 and 60 mol %. This research may offer a deeper understanding of the preparation of efficient and environmentally friendly, white luminescence materials.

【 授权许可】

Unknown