Spectral modulation of BCNO phosphors by Al3+ and Ti4+ doping for white LEDs

Spectral modulation of BCNO phosphors by Al3+ and Ti4+ doping for white LEDs BCNO phosphors with Al3+ and Ti4+ doping were synthesized and their spectral properties were systematically investigated. The BCNO phosphors with Al3+ doping are mainly composed of amorphous Al2O3 and BCNO nanocrystal. The crystallinity of BCNO phosphors and intensity of B-N related chemical bonds are improved with Al3+ doping which leads to the enhancement of quantum yields from 5.6% to 63.4%. In addition, The BCNO phosphors with Ti4+ doping are consisted of TiO2 with anatase and rutile structures and BCNO nanocrystals. The emission spectra are red shifted from 510nm to 555nm with the increase of Ti4+ doping, and the excitation intensity is successfully improved by Ti4+ doping in a wide range of 400−500nm, which is favorable for blue light excitation. Both the spectral properties and electron transition process can be explained by a simplified energy band diagram. The BCNO phosphors with Al3+ and Ti4+ doping can be good candidates for white LED with ultraviolet and blue light excitation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Luminescence Elsevier

Spectral modulation of BCNO phosphors by Al3+ and Ti4+ doping for white LEDs

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Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier B.V.
ISSN
0022-2313
eISSN
1872-7883
D.O.I.
10.1016/j.jlumin.2016.04.005
Publisher site
See Article on Publisher Site

Abstract

BCNO phosphors with Al3+ and Ti4+ doping were synthesized and their spectral properties were systematically investigated. The BCNO phosphors with Al3+ doping are mainly composed of amorphous Al2O3 and BCNO nanocrystal. The crystallinity of BCNO phosphors and intensity of B-N related chemical bonds are improved with Al3+ doping which leads to the enhancement of quantum yields from 5.6% to 63.4%. In addition, The BCNO phosphors with Ti4+ doping are consisted of TiO2 with anatase and rutile structures and BCNO nanocrystals. The emission spectra are red shifted from 510nm to 555nm with the increase of Ti4+ doping, and the excitation intensity is successfully improved by Ti4+ doping in a wide range of 400−500nm, which is favorable for blue light excitation. Both the spectral properties and electron transition process can be explained by a simplified energy band diagram. The BCNO phosphors with Al3+ and Ti4+ doping can be good candidates for white LED with ultraviolet and blue light excitation.

Journal

Journal of LuminescenceElsevier

Published: Aug 1, 2016

References

  • Chem. Commun.
    Wang, F.; Chen, Y.H.; Liu, C.Y.; Ma, D.G.
  • J. Phys. Chem. C
    Ding, Y.; Wang, Y.L.; Shi, S.Q.; Tang, W.H.
  • J. Lumin.
    Faryuni, I.D.; Nuryadin, B.W.; Iskandar, F.; Abdullah, Khairurrijal, M.; Ogi, T.; Okuyama, K.
  • Phys. Rev. B
    Katzir, A.; Suss, J.T.; Zunger, A.; Halperin, A.

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