Research ArticlesNo Access

A novel yellowish white Dy³⁺ activated α-Al₂O₃ phosphor: Photoluminescence and optical studies

Sandeep Kumar

School of Physics, Shri Mata Vaishno Devi University, Katra 182320, India

Search for more papers by this author

Ram Prakash

School of Physics, Shri Mata Vaishno Devi University, Katra 182320, India

Corresponding author.

Search for more papers by this author

, and

Vinay Kumar

School of Physics, Shri Mata Vaishno Devi University, Katra 182320, India

Search for more papers by this author

https://doi.org/10.1142/S1793604715500617Cited by:27 (Source: Crossref)

Abstract

Trivalent Dy doped α-Al₂O₃ phosphor was synthesized by low temperature solution combustion method using urea as fuel. The phosphor was well characterized by X-ray diffraction (XRD), photoluminescence (PL) spectroscopy and diffused reflectance spectroscopy (DRS). XRD study confirmed the hexagonal structure of Dy³⁺ doped α-Al₂O₃ as prepared phosphor. Under various ultraviolet (UV) excitations (353 nm, 367 nm and 325 nm), α-Al₂O₃:Dy³⁺ phosphor exhibits the characteristic emission bands centered at 490 nm, 589 nm and 670 nm, resulting from the ⁴F_9/2–⁶H_J/2 (J = 15, 13, 11) transitions of Dy³⁺, respectively. The observed CIE coordinates (x, y) as (0.373, 0.379) corresponds to the shade of yellowish white in color gamut. The bandgap was calculated using diffused reflectance (DR) spectrum and it was estimated around 5.9 eV.

Keywords:

References

J. Wrzyszcz et al. , J. Alloys Compd. 341 , 358 ( 2002 ) . Crossref, Web of Science, Google Scholar
W. M. Yen , S. Shionaya and H. Yamamoto , Practical Applications of Phosphors , 2nd edn. ( CRC Press , Boca Raton , 2006 ) . Crossref, Google Scholar
D. R. Vij, Lumines. Solids (Springer, Berlin, 1998) . Google Scholar
E. Bulur et al. , Radiat. Prot. Dosim. 65 , 373 ( 1996 ) . Crossref, Web of Science, Google Scholar
K. M. Krishna et al. , J. Electrochem. Soc. 154 , J310 ( 2007 ) . Crossref, Web of Science, Google Scholar
B. Liu et al. , Appl. Phys. Lett. 86 , 191111 ( 2005 ) . Crossref, Web of Science, Google Scholar
G. H. Dieke et al. , J. Opt. Soc. Am. 46 , 495 ( 1956 ) . Crossref, Web of Science, Google Scholar
C. R. Kesavulu et al. , Mater. Chem. Phys. 130 , 1078 ( 2011 ) . Crossref, Web of Science, Google Scholar
K. Linganna et al. , J. Quant. Spectrosc. Ra. 118 , 40 ( 2013 ) . Crossref, Web of Science, Google Scholar
M. Jayasimhadri et al. , J. Am. Ceram. Soc. 93 , 494 ( 2010 ) . Crossref, Web of Science, Google Scholar
K. Pavania et al. , Mater. Chem. Phys. 129 , 292 ( 2011 ) . Crossref, Web of Science, Google Scholar
F. Yang et al. , Ceram. Int. 40 , 10189 ( 2014 ) . Crossref, Web of Science, Google Scholar
C. Eckert et al. , ECS Transactions 25 , 1293 ( 2009 ) . Crossref, Google Scholar
N. Rakov et al. , J. Appl. Phys. 101 , 036102 ( 2007 ) . Crossref, Web of Science, Google Scholar
R. K. Rai et al. , J. Lumin. 132 , 210 ( 2012 ) . Crossref, Web of Science, Google Scholar
G. Rani et al. , Adv. Powder. Technol. 25 , 767 ( 2014 ) . Crossref, Web of Science, Google Scholar
R. Ianos et al. , J. Mater. Sci. 44 , 1016 ( 2009 ) . Crossref, Web of Science, Google Scholar
Z. Q. Yu et al. , J. Cryst. Growth. 256 , 210 ( 2003 ) . Crossref, Web of Science, Google Scholar
B. D. Cullity , Element of X-ray Diffraction , 2nd edn. ( Addison-Wesley , New York , 1972 ) . Google Scholar
J. S. Kumar et al. , J. Lumin. 130 , 1916 ( 2010 ) . Crossref, Web of Science, Google Scholar
L. Zhu et al. , Physica B 405 , 4401 ( 2010 ) . Crossref, Web of Science, Google Scholar
L. Lin et al. , J. Alloys. Compd. 455 , 327 ( 2008 ) . Crossref, Web of Science, Google Scholar
A. K. Bedyal et al. , J. Mater. Sci. 49 , 6404 ( 2014 ) . Crossref, Web of Science, Google Scholar
M. A. F. Monteiro et al. , Micropor. Mesopor Mater. 108 , 237 ( 2008 ) . Crossref, Web of Science, Google Scholar
J. L. Fry et al. , J. Chem. Phys. 48 , 2342 ( 1968 ) . Crossref, Web of Science, Google Scholar
P. Jakes et al. , Funct. Mat. Lett. 7 , 1350073 ( 2014 ) . Link, Web of Science, Google Scholar
A. E. Morales et al. , Rev. Mex. Fis. 53 , 18 ( 2007 ) . Google Scholar
I. Costina et al. , Appl. Phys. Lett. 78 , 4139 ( 2001 ) . Crossref, Web of Science, Google Scholar
M. A. Frutis et al. , Appl. Phys. Lett. 72 , 1700 ( 1998 ) . Crossref, Web of Science, Google Scholar