Charge compensation engineering for high-performance dolomite-type BaTi(BO₃)₂:Eu³⁺ red-emitting phosphor for backlight display applications with a wide color gamut

Abstract

Exploiting high color purity phosphors is the core problem of developing phosphor conversion light-emitting diodes (pc-LEDs) for display devices. Eu3+-activated BaTi(BO3)2 (BTB) red-emitting phosphors were first synthesized via solid-state reaction...

Cation vacancy-boosted BaZnB4O8:xEu3+ phosphors with high quantum yield and thermal stability for pc-WLEDs

“…6 In recent years, it has also been widely used in the fields of indoor plant growth lighting, liquid crystal displays (LCDs) and phototherapy. [7][8][9] The phosphor-converted white light-emitting diodes ( pc-WLEDs) can be achieved by three methods. The first method involving the coating of a yellow phosphor based on Y 3 Al 5 O 12 :Ce 3+ (YAG: Ce 3+ ) on a blue chip is the most commercially adopted method.…”

Lanthanide-doped Na2MgScF7 exhibiting downshifting and upconversion emissions for multicolor anti-counterfeiting

“…9–13 The Eu 3+ ion usually emits strong red light, and the emission wavelength range is 550–650 nm, corresponding to the transition of the 5 D 0 to 7 F n energy level. 14–16 On the basis of the ladder-like energy levels, some of the lanthanide ions can realize UC emission, which can convert two or more lower-energy photons into one higher-energy photon. Typically, three ion pairs, Yb 3+ –Er 3+ , Yb 3+ –Tm 3+ and Yb 3+ –Ho 3+ , have attracted great attention for their efficient UC emissions through the energy transfer upconversion (ETU) mechanism, in which the sensitizer (Yb 3+ ) absorbs lower energy photons and then donates energy to the activator (Er 3+ , Tm 3+ or Ho 3+ ) sequentially.…”

Quantum Dot Enabled Efficient White LEDs for Wide Color Gamut Displays

“…Different types of green-and red-emitting phosphors that have narrow emission bands have been used to enhance the gamut over 100%. [9][10][11] However, the FWHM of these phosphors still fall far short from the desired levels such as 43 nm for green-emitting luminescent material, which results in 111.2% NTSC. [9] Colloidal quantum dots (QDs) have started to attract significant attention not only for the biomedical [12,13] and energy storage applications, [14] but also for LCD TV technology [15][16][17][18] because of their appealing optoelectronic properties, such as size-tunable energy levels, suppressed trap states, and high-level surface engineering.…”

“…Different types of green‐ and red‐emitting phosphors that have narrow emission bands have been used to enhance the gamut over 100%. [ 9–11 ] However, the FWHM of these phosphors still fall far short from the desired levels such as 43 nm for green‐emitting luminescent material, which results in 111.2% NTSC. [ 9 ]…”