SrLaNaTeO6:Eu3+ red-emitting phosphors with high luminescence efficiency and high thermal stability for high CRI white LEDs

A green light emissive LaSr2AlO5:Er3+ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

“…For the doped optimized sample, different absorption peaks were obtained at 254 nm, 377 nm, 448 nm, 488 nm, and 521 nm due to the charge transfer between oxygen and erbium ion, 4 I 15/2 → 4 G 11/2 , 4 I 15/2 → 4 F 5/2 , 4 I 15/2 → 4 F 7/2 and 4 I 15/2 → 2 H 11/2 transitions, respectively. The optical band gap ( E g ) is computed using the Kubelka Munk formula provided by 57 …”

“…I 15/2 / 4 G 11/2 , 4 I 15/2 / 4 F 5/2 , 4 I 15/2 / 4 F 7/2 and 4 I 15/2 / 2 H 11/2 transitions, respectively. The optical band gap (E g ) is computed using the Kubelka Munk formula provided by57 …”

Thermal-stability synergy improvement of Sm3+ and Eu3+ in Ca3.6In3.6(PO4)6: the effect of local symmetry

“…Phosphors appropriate for practical applications require not only excellent emission capability but also the ability to maintain favorable luminous color at high temperatures. Color purity is the key factor in evaluating phosphor and can be calculated using the following equation: 43 where ( x , y ), ( x i , y i ), and ( x d , y d ) are the CIE coordinates for the phosphor measured at T K, the standard white light, and the dominant wavelength, respectively. The trends in color purity at different temperatures for CI 1− x P:0.05Eu 3+ , CI 1− y P:0.04Sm 3+ , and CI 1− x − y P:0.05Eu 3+ ,0.04Sm 3+ are depicted in Fig.…”

Improvement of Luminescence and Photocatalytic Performance of ZnO:Eu3+ Nanocrystals Activated by Na+ Ions

“…Luminescent materials or materials containing luminescent centers with long lifetimes are very promising in various fields such as white LED [1] and photocatalysis [2]. As the classical white LEDs suffer from insufficient red light emission, a continuous interest is given to Eu 3+ -doped phosphors since europium is well-known for its high red emission.…”