Luminescence enhancement of Al3+ co-doped Ca3Sr3(VO4)4:Eu3+ red-emitting phosphors for white LEDs
Source abstract
Abstract
Abstract A series of red-emitting Al 3+ co-doped Ca 3 Sr 3 (VO 4 ) 4 :Eu 3+ and Ca 3 Sr 3 (VO 4 ) 4 :Eu 3+ phosphors with standard rhombohedral structures synthesized through the combustion method fueled by citric acid. By using X-ray diffraction, scanning electron microscopy, and photoluminescence spectroscopy, the crystal structure and photoluminescence properties of the prepared powder samples are investigated. The results indicate that the phosphors can be efficiently excited by blue light to achieve intense red luminescence (618 nm), which is associated with the hypersensitive 5 D 0 → 7 F 2 transition of Eu 3+ . Furthermore, significant enhancement in the photoluminescence intensity from Al 3+ co-doped Ca 3 Sr 3 (VO 4 ) 4 :Eu 3+ phosphors is observed for an Al 3+ concentration of 6 mol%. The influence of Al 3+ on the crystal structure of Ca 3 Sr 3 (VO 4 ) 4 :Eu 3+ and the mechanism of the photoluminescence enhancement are discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Gas Sensing Nanomaterials and Sensors · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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