Rare earth (RE3þ) doped materials have wide range of applications
in the field of solid state lighting, display, and laser technologies.
The phosphor material should have good absorption and
emission properties, good thermal and chemical stability, minimal
thermal quenching and high quantum yield. This material should
also be preferably inexpensive and easy to fabricate [1–4]. Trivalent
RE3þ ions having 4f–4f inner-shell transitions possess specific
advantage features such as high luminescence yield, narrow emission
line, and long decay time constant. Moreover, in recent years,
white light emitting diodes (W-LEDs) have been targeted as next
generation solid state lighting sources due to the advantages of long
lifetime, energy saving, high efficiency, reliability and environmentally
friendly properties [5–7]. Currently, trivalent dysprosium ion
(Dy3þ) doped phosphors are of great interest because of white light
emission characteristic. Usually, Dy3þ ions have two dominant
emission bands: one is in blue region (470–500 nm) due to 4
F9/2-6
H15/2 transition and the other is in yellow region (570–
600 nm) corresponding to the 4
F9/2-6
H13/2 transition [8–10].
Cadmium contained quantum dots (QDs) have attracted enormous
interests in the last decade as a novel class of material due to their