A deep-red-emitting Bi3+/Mn4+-doped CaLi6La2Nb2O12 phosphor: Luminescence and energy transfer properties
Source abstract
Abstract
Abstract Recently, much attention has been attracted on the optical properties based on the phosphors for LED light. A near Ultraviolet (n-UV) and blue chip activated phosphor of CaLi6La2Nb2O12:Bi3+, Mn4+ is synthesized by a traditional SSR method. Phase purity and lattice structure of the crystal have been confirmed and investigated by XRD , Rietveld refinement , FE-SEM and TEM . The luminescence performances of the series phosphors are investigated by diffuse reflection spectra (DR), Raman scattering spectra, steady-state PL spectra and the measurement of lifetime., the CaLi 6La2Nb2O12:Bi3+, Mn4+ exhibits emission peaked at ∼466 and ∼711 nm Under excited at 312 nm. The Dq, B and C are calculated to estimate the nephelauxetic effect of Mn4+ in [NbO6] octahedral lattice. The coordinate shifting could be controllable through the energy transfer Bi3+→Mn4+, which can be verified by PL spectra and decay lifetimes. Finally, by coating the blend of red CaLi6La2Nb2O12:0.03Bi3+,0.015 Mn4+ and Y3Al5O12:Ce3+ (YAG:Ce3+) phosphors onto the blue LED chip, a LED device with good performances (x = 0.36, y = 0.36, CRI = 86.6, CCT =4220 K) can be achieved. Hence, CaLi6La2Nb2O12:Bi3+, Mn4+ is a good material of red emission.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Microwave Dielectric Ceramics Synthesis · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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