Effect of codoping Ce <sup>3+</sup> on the luminescence properties of Sr <sub>9</sub> Mg <sub>1.5</sub> (PO <sub>4</sub> ) <sub>7</sub> :Eu <sup>2+</sup> orange–yellow phosphor
Bibliographic record
Abstract
Abstract Sr 9 Mg 1.5 (PO 4 ) 7 :Eu 2+ has recently been reported as a promising blue light‐excited orange–yellow phosphor that can be used in white LED device. Here, Ce 3+ ‐codoping is found to be an effective strategy to improve the luminescence performance of Sr 9 Mg 1.5 (PO 4 ) 7 :Eu 2+ phosphor. The coexistence of Eu 2+ and Eu 3+ ions has been verified via photoluminescence spectral analysis. The reduction of Eu 3+ to Eu 2+ in Sr 9 Mg 1.5 (PO 4 ) 7 lattice cannot be completed in a reducing atmosphere, but can be promoted through codoping with Ce 3+ ions to a great extent, which finally increase the effective concentration of Eu 2+ in the crystal lattice. The Eu 3+ −Eu 2+ reduction mechanism is analyzed using a charge compensation model. This work not only achieves enhanced luminescence of the Sr 9 Mg 1.5 (PO 4 ) 7 :Eu 2+ phosphor by codoping with Ce 3+ ions, but also provides new insights into the design of Ce 3+ /Eu 2+ codoped luminescent materials.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.006 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.004 | 0.002 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.001 | 0.004 |
| Scholarly communication | 0.000 | 0.002 |
| Open science | 0.004 | 0.001 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; both teacher heads agree on what is shown here.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".