Effects of charge compensator Li+ co-doping on the structure and luminescence properties of Cd2V2O7:Eu3+ red phosphors

Recent progress in trivalent europium (Eu3+)-based inorganic phosphors for solid-state lighting: an overview

“…Similarly, the effect of Li as a charge compensator in the Eu 3+ -doped Cd 2 V 2 O 7 phosphor was studied, and it was found that the selected phosphor compositions showed enhanced red emission. 159 Novel Na 2 GdMg 2 (VO 4 ) 3 :Eu 3+ (NGMVO:Eu 3+ ) red phosphors were crystallized in a single cubic garnet structure. Under the excitation of NUV light at 356 nm, the emission spectra of the NGMVO host could be divided into two parts that resulted from 3 T 2 → 1 A 1 and 3 T 1 → 1 A 1 transitions of VO 4 3− .…”

Warm-white luminescence of Dy3+ and Sm3+ co-doped NaSrPO4 phosphors through energy transfer between Dy3+ and Sm3+ ions

“…Typically, widespread w-LEDs are composed of a blue InGaN chip and a yellow Y3Al5O12:Ce 3+ (YAG:Ce) phosphor [8][9][10][11]. There are shortcomings to this combination, just as highly correlated color temperature (CCT > 5000 K) and low color rendering index (CRI < 80), since lack of a red emission component [12][13][14][15]. Additionally, some researchers have made novel w-LEDs with an ultraviolet (UV) LED chip and tri-color (RGB) phosphors to realize white light.…”

“…Two emission peaks located at 484 nm (blue) and 577 nm (yellow), which originated from the magnetic dipole transition 4 F9/2→ 6 H15/2 and electronic dipole transition 4 F9/2→ 6 H13/2 of Dy 3+ ions, respectively.There are no significant shifts of the emission peaks, although the luminescence intensities of NaSrPO4:Dy 3+ increases with synthesis temperature up to 1000 °C and later declines. The synthesis temperature produces two concrete roles on its interior structure, which affects the luminescence property of the specimens[14]: On one hand, the crystallization of NaSrPO4 and diffusion of the Dy 3+ ions in the structure are favored by high temperatures; on the other hand, heating at high temperatures leads to the formation of large crystal grains. At synthesis temperatures of 800-1000 °C, the first aspect acts a critical section in improving the luminescence performance, while the second affects the luminescence obtained above 1000 °C.…”