A novel Eu2+-activated calcium zirconium silicate phosphor: Ca3ZrSi2O9:Eu2+

Ca18Na3Y(PO4)14:Eu2+,Mn2+: a novel single-phase dual-emission phosphor and its spectral modulation by Mg2+ for plant lighting and WLEDs

“…The emission of Eu 2+ is sensitive to its coordination environments, 31,32 and there are multiple sites in the host for Eu 2+ to occupy, so an asymmetric broadband emission is observed in CNYPO:xEu 2+ . To better identify the site occupation of Eu 2+ , Gaussian fitting was performed and the result is shown in Fig.…”

Advancing Red-Emitting Fluoride Phosphors for Highly Stable White Light-Emitting Diodes: Crystal Reconstruction and Covalence Enhancement Strategy

“…White light-emitting diodes (WLEDs) find wide applications in solid-state lighting, liquid crystal display backlighting, and more. − The properties of red phosphors play a crucial role in determining the technical indicators of WLED devices, such as luminous efficacy (LE), color rendering index (CRI), color gamut, and overall stability. − However, several existing red-light material options present limitations in terms of light efficiency, stability, and complexity of preparation. Eu 2+ -doped nitrides, despite their wide red emission, suffer from a significant portion of the spectrum falling beyond the sensitivity range of the human eye, resulting in reduced light efficiency. , Red quantum dots like InP, CdSe, and perovskites exhibit poor stability and involve intricate preparation processes. − Eu 3+ /Mn 4+ -activated oxides, on the other hand, are challenging to excite with blue light. − In contrast, Mn 4+ -doped fluorides demonstrate effective excitation by blue light, possess a narrow emission spectrum (∼630 nm, aligning with the B.T.2020 display standard), high quantum efficiency (QE), and excellent thermal stability, making them a subject of widespread attention. , …”

Synthesis and photoluminescence properties of Ca₃MgSi₂O₈ with high Eu²⁺ concentration

“…We also found new oxide-based phosphors employing crystal-site engineering, including Sr 1.2 Eu 0.8 SiO 4 for yellow-orange emissions and Ba 1.2 Eu 0.8 -SiO 4 for green emissions under blue light excitation, 20) and Ca 2.7 Eu 0.3 ZrSi 2 O 9 for red emissions under near-UV excitation. 21) In this study, we report the photoluminescence (PL) properties of Eu 2+ -activated Ca 3 MgSi 2 O 8 (Ca 3 MgSi 2 O 8 : Eu 2+ ) designed via crystal-site engineering using high Eu 2+ substitutions for the Ca sites in the host lattice. Ca 3 MgSi 2 O 8 possessed a merwinite-type structure with a monoclinic lattice (space group: P2 1 /c, No.…”