Luminescence properties and thermal stability of red phosphor Mg2TiO4:Mn4+ additional Zn2+ sensitization for warm W-LEDs
Source abstract
Abstract
Abstract Currently, the exploration of non-rare-earth Mn 4+ -activated oxide red phosphor is of great demand for phosphor-converted warm white-light-emitting diodes (W-LEDs). Here, Mg 2 TiO 4 :Mn 4+ and Mg 2 TiO 4 :Mn 4+ ,Zn 2+ red phosphors were prepared using a solid-state reaction route and exhibited a strong red emission peaked at ∼657 nm. The microstructure and luminescent performance of the obtained red phosphors were investigated. Additionally, the concentration quenching and nephelauxetic effect of Mn 4+ in the Mg 2 TiO 4 host lattice were evaluated in detail. Moreover, Mg 2 TiO 4 :Mn 4+ ,Zn 2+ manifests an enhanced luminescence intensity compared to the sample without Zn 2+ doping with a quantum efficiency of 38.2% and good thermal resistance of Δ E = 0.36 eV. As proof of concept, when we incorporated Mg 2 TiO 4 :Mn 4+ ,Zn 2+ and commercial YAG:Ce 3+ into the package of a blue LED chip, a warm white light was produced with a high colour rendering index and a low correlated colour temperature; thus, they have promise as an application as a colour converter in the field of warm W-LEDs.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Perovskite Materials and Applications · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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