Non-rare earth white emission phosphor: Ti-doped MgAl2O4

Authors :: J., H. Lim
B., N. Kim
Y., Kim
S., Kang
R., J. Xie
I., S. Chong
K., Morita
H., Yoshida
K., Hiraga
Source :: Applied Physics Letters, 102, 031104.
Publication Year :: 2013
Publisher :: American Institute of Physics, 2013.
Abstract: White emission produced by Ti-doped MgAl2O4 phosphor powder is reported, which is in contrast to blue emission from most Ti-doped single crystals of MgAl2O4. The white emission peak consists of four deconvoluted peaks: 440, 490, 550, and 620 nm, when was excited by 260 nm wavelength. Ti4+ in octahedral sites was found to contribute mostly to greenish blue emissions at 490 and 550 nm. The red emission at 620 nm was produced by abundant Mg 2+ and O2− vacancies in the spinel powder.

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