Synthesis, crystal structure and photoluminescence of Eu-α-SiAlON

Simultaneous tuning for excitation and emission of N doped Sr2SiO4:Eu for white light LEDs

“…Sulfide phosphors are traditional series with long emission wavelength (i.e., SrS:Eu 2+ and CaS:Eu 2+ ), but these materials suffer from low chemical stability in LEDs environment [4][5][6]. Nitride phosphors are more stable and more efficient, but the synthesis of these materials requires high reaction temperatures, high pressure and high-purity nitride starting materials, which become obstacles for the further application [7][8][9]. Thus, it is necessary and challengeable to shift the emission wavelength of the oxide phosphors to the long wavelength.…”

Luminescence properties of novel Sm3+, Dy3+ doped LaMoBO6 phosphors

“…Recently, the development of rare earth (RE) ions activated novel luminescent materials have attracted more attention due to their potential applications in different optical display systems [2][3][4][5][6][7][8][9]. Because the 4f electrons of RE ions are shielded by the outer 5s and 5p electrons, the intra-4f emission spectra of RE ions are characterized by narrow lines with high color purity.…”

Blue-emitting phosphor M2B5O9Cl: Eu2+ (M Sr, Ca) for white LEDs

“…Solid-state lighting (SSL) is an energyefficient lighting technology, which offers advantages such as low power consumption, long lifetime (>100,000 h), and environmental friendliness. It is estimated that even if only 50% SSL were to be achieved and displaced current white-lighting technologies, the electricity used for lighting would be cut by 62% [1,2]. However, commercial white light emitting diodes (w-LEDs) produced by combining a blue LED chip with yellow-emitting phosphor cannot meet the requirement of general illumination due to their poor color rendering index (<75) and unsatisfactory high color temperature (>4500 K) because of weak red emission [3,4].…”