论文成果
Photoluminescence properties and thermal stability of blue-emitting Ba<inf>5 − x</inf>Cl(PO<inf>4</inf>)<inf>3</inf>:xEu<sup>2 +</sup>(0.004 ≤ x ≤ 0.016) phosphors
- 发布时间：2023-10-19
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- 关键字：Light emission;Europium - High temperature applications - Light emitting diodes - Phosphates - Phosphors - Photoluminescence - Quality control - Quenching - Solid state reactions - Strontium compounds - Thermodynamic stability;Blue emission - Concentration quenching - Dipole dipole interactions - High temperature solid-state reaction - Optimum concentration - Photoluminescence properties - Radiation reabsorption - Temperature dependent
- 摘要：A series of blue-emitting Ba<inf>5 − x</inf>Cl(PO<inf>4</inf>)<inf>3</inf>:xEu<sup>2 +</sup>(0.004 ≤ x ≤ 0.016) phosphors were synthesized by conventional high-temperature solid state reaction. The structure and photoluminescence (PL) properties of the phosphors were investigated. The as-prepared phosphors exhibit broad excitation band ranging from 250 to 420 nm, and strong asymmetric blue emission band peaking at 436 nm. The optimum concentration of Eu<sup>2 +</sup>in the Ba<inf>5</inf>Cl(PO<inf>4</inf>)<inf>3</inf>:Eu<sup>2 +</sup>phosphor is x = 0.01, and the concentration quenching mechanism is verified to be the combined actions of dipole-dipole interaction and radiation re-absorption mechanism. The thermal stability of Ba<inf>5</inf>Cl(PO<inf>4</inf>)<inf>3</inf>:Eu<sup>2 +</sup>was evaluated by temperature-dependent PL spectra. Compared with that of commercial BaMgAl<inf>10</inf>O<inf>17</inf>:Eu<sup>2 +</sup>(BAM) phosphor, the Ba<inf>5 − x</inf>Cl(PO<inf>4</inf>)<inf>3</inf>:xEu<sup>2 +</sup>phosphors exhibit similarly excellent thermal quenching property. In addition, the CIE chromaticity coordinates of Ba<inf>5 − x</inf>Cl(PO<inf>4</inf>)<inf>3</inf>:xEu<sup>2 +</sup>(0.004 ≤ x ≤ 0.016) were calculated to evaluate the color quality. All the results indicate that Ba<inf>5</inf>Cl(PO<inf>4</inf>)<inf>3</inf>:Eu<sup>2 +</sup>is a promising candidate phosphor for near-ultraviolet (n-UV) pumped LED. © 2016 Elsevier B.V.
- 卷号：171
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- 是否译文：否