Alkali metal ion substitution induced luminescence enhancement of NaLaMgWO6:Eu3+ red phosphor for white light-emitting diodes

Green and Orange Emissive Carbon Dots with High Quantum Yields Dispersed in Matrices for Phosphor-Based White LEDs

“…In recent years, light-emitting diodes (LEDs) based on phosphors have shown great potential in the application of cost-effective backlighting for liquid-crystal displays and multicolor displaying. − Especially, the phosphor-converted white LEDs will be a new generation of lighting sources used in daily life. − Generally, white LEDs are fabricated by ultraviolet (UV) as excitation combined with red-green-blue (RGB) phosphors or blue emission chip with yellow phosphors. − Among them, white LEDs assembled by rare-earth ion-based phosphors have been developed and have already become commercial. , Nevertheless, expensive raw materials and rigorous preparation conditions are still the problems currently encountered to prepare these phosphors. , More recently, semiconductor-based quantum dots (QDs), which possess high performances, including easily tunable band gap, narrow full-width at half-maximum (fwhm), and high photoluminescence quantum yield (PLQY), have attracted much attention for phosphor-based white LEDs. , However, concerns about the serious toxicity from Pb and Cd ions may hinder their practical application in LEDs. , Therefore, excellent alternatives with low toxicity, photostability, simple preparation, and cheap raw materials are highly desired for the phosphor-based LEDs. , …”

“…6,7 Nevertheless, expensive raw materials and rigorous preparation conditions are still the problems currently encountered to prepare these phosphors. 10,11 More recently, semiconductor-based quantum dots (QDs), which possess high performances, including easily tunable band gap, narrow full-width at half-maximum (fwhm), and high photoluminescence quantum yield (PLQY), have attracted much attention for phosphor-based white LEDs. 12,13 However, concerns about the serious toxicity from Pb and Cd ions may hinder their practical application in LEDs.…”

Tunable lanthanide/transition metal ion‐doped novel phosphors for possible application in w‐LEDs: a review

“…Han et al . very recently prepared a series of red‐emitting Na 1‐x Li x/2 K x/2 La 0.6 Eu 0.4 MgWO 6 phosphors and found that the monoclinic structure of NaLaMgWO 6 was conserved at x = 0.3 . The PL studies revealed that the red emission of Eu 3+ could be highly increased by partially substituting the Li + /K + ions for Na + ions.…”

Synthesis of a Sm3+-doped YGa1.5Al1.5(BO3)4 phosphor via a mechanical activation-assisted solid-state reaction

“…White light-emitting diodes (WLEDs) are effective fluorescent lamps due to their high luminous efficiency, small device size, long serving lifetime, and environmental friendliness. [1][2][3][4][5][6][7] WLEDs are generated by the combination of a blue LED chip and a yellow-emitting phosphor like Y 3 Al 5 O 12 :Ce 3+ . However, the deficiency of Y 3 Al 5 O 12 :Ce 3+ in the red spectral region still restricts the application of such WLEDs because the generated white light cannot have an extremely high colour rendering index (CRI) or a relatively low correlated colour temperature (CCT).…”