Strong and pure red-emitting Eu³⁺-doped phosphor with excellent thermal stability for warm WLEDs

Abstract

Red-emitting phosphor, as an indispensable part of high quality white-light-emitting diodes (WLED), has aroused extensive research. A red-emitting Eu3+-doped LiYO2 phosphor with excellent luminesce properties is prepared by solid phase...

Thermally stable photoluminescence of Eu3+ doped strontium pyrophosphate: red emitting phosphor with high color purity

“…Because WLEDs are more useful than traditional incandescent or fluorescent light sources due to their long lifespan, high energy conversion efficiency, low cost, and environmental friendliness, highly efficient phosphors have been developed. 1,2 Due to their low energy consumption, LEDs are very useful in lowering energy consumption in remote areas and underdeveloped areas. The general approach has been to fabricate white LEDs using commercial yellow phosphor Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ).…”

Luminescence properties and Judd–Ofelt analysis of Tb3+ doped Sr2YTaO6 double perovskite phosphors for white LED applications

“…Unfortunately, these white LEDs usually suffer from a low color rendering index (CRI) and a high correlated color temperature (CCT) due to the lack of red components in white emissions. [4][5][6] To address this problem, the method of using near ultraviolet (UV) chips to pump tricolor (red + green + blue) phosphors has been proposed and is expected to achieve white LEDs with a high CRI and an appropriate CCT. In this regard, the pressing priority is to search for new efficient tricolor phosphors including green emitting phosphors that can be effectively excited by near UV LED chips.…”

Thermally stable and color-tunable bi-activated (Dy3+/Eu3+) alkaline earth metasilicate phosphor for luminescent devices

“…One such fabricated w-LED shows a deprived value of color rendering index and correlated colour temperature caused by the dearth of red colour emitting components. [8][9][10] In order to achieve sufficient CRI and lower CCT with improved luminous stability, researchers and scientists have turned to an alternative approach in which the suitable amalgamation of an RGB (red: R, green: G, and blue: B) mono phase phosphor onto a UV/n-UV LED has been proposed. Nevertheless, the proclaimed approach is challenging to implement in practice due to the reabsorption of blue emission by the RG phosphor.…”