Full-spectrum solid-state white lighting with high color rendering index exceeding 96 based on a bright broadband green-emitting phosphor

Ce3+-Activated SrLu2Al3ScSiO12 Cyan-Green-Emitting Garnet-Structured Inorganic Phosphor Materials toward Application in Blue-Chip-Based Phosphor-Converted Solid-State White Lighting

“…Meanwhile, the proposed optimal SLASSO:2%Ce 3+ sample also exhibits a high EQE of 51.7%. Table summarizes the luminescence properties of some blue-light-excited green-emitting phosphors. ,,,,,− In contrast to the green phosphor described above, this novel cyan-green-emitting SLASSO:2%Ce 3+ garnet phosphor exhibits an appropriate bandwidth (fwhm = 111 nm) and peak emission (peak = 525 nm), as well as a high quantum yield (IQE = 93%); thus, it has great potential in the preparation of high-performance WLEDs for healthy solid-state lighting.…”

“…18,19 However, the lack of a red component in the resulting spectrum of YAG:Ce 3+ causes the LED device to exhibit poor CRI, normally below 80, and high correlated color temperature, usually greater over 5000 K. 20,21 Although the addition of an additional commercial redemitting CaAlSiN 3 :Eu 2+ phosphor in the above scheme is a simple and effective way to optimize Ra and CCT, 22 it is impossible to obtain satisfactory Ra values (>95) due to the presence of a cyan gap in 480−520 nm region. 23,24 This pain point for the LED industry seriously hinders its further commercial application in photography, museums, art galleries, backlighting, and medical lighting. 25−27 In response to the issues mentioned above, two feasible approaches have been proposed by researchers to fabricate high-performance WLEDs toward a more comfortable illumination.…”

“…Presently, the assembly of commercially available blue light InGaN LED chips and the yellow Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ) phosphor is the mainstream approach to fabricate warm white-light-emitting diodes (WLEDs). , However, the lack of a red component in the resulting spectrum of YAG:Ce 3+ causes the LED device to exhibit poor CRI, normally below 80, and high correlated color temperature, usually greater over 5000 K. , Although the addition of an additional commercial red-emitting CaAlSiN 3 :Eu 2+ phosphor in the above scheme is a simple and effective way to optimize Ra and CCT, it is impossible to obtain satisfactory Ra values (>95) due to the presence of a cyan gap in 480–520 nm region. , This pain point for the LED industry seriously hinders its further commercial application in photography, museums, art galleries, backlighting, and medical lighting. − In response to the issues mentioned above, two feasible approaches have been proposed by researchers to fabricate high-performance WLEDs toward a more comfortable illumination. One of the approaches is combining near-ultraviolet (near-UV) LED chips with tricolor phosphors (blue, green, and red). − Another option is employing the blue light chip to pump the mixed phosphors with red and green emission .…”

Highly efficient blue‐emitting phosphor via charge compensation strategy and its application for white LED lighting

“…The activators and host materials are crucial for conceiving appropriate phosphor 21–24 . Among the lanthanides, Ce is often used as activators for obtaining broader emission band phosphors because of the parity allowed 4f−5d electric dipole transition 25–28 . And the luminescence characteristics of Ce 3+ are strongly depended on the host crystal structure because the 5d orbitals are sensitive to the crystal field environment and nature of bonds (covalence/ionic) 29–32 .…”

“…[21][22][23][24] Among the lanthanides, Ce is often used as activators for obtaining broader emission band phosphors because of the parity allowed 4f−5d electric dipole transition. [25][26][27][28] And the luminescence characteristics of Ce 3+ are strongly depended on the host crystal structure because the 5d orbitals are sensitive to the crystal field environment and nature of bonds (covalence/ionic). [29][30][31][32] Therefore, the incorporation of Ce 3+ as an activator in phosphors enables the generation of blue to orange emission in different host lattice.…”