Co-Precipitation Synthesis and Photoluminescence Properties of Sc<sub>0.88</sub>Lu<sub>0.05</sub>(V<sub>1-x</sub>P<sub>x</sub>)O<sub>4</sub>:Eu<sup>3+</sup><sub>0.07</sub> Red Phosphor for White Light Emitting Diodes
Bibliographic record
Abstract
Sc 0.88 Lu 0.05 (V 1-x P x )O 4 :Eu 3+ 0.07 (0≤x≤0.5) phosphors were synthesized by co-precipitation method. The structure, morphology and luminescence spectra of samples were investigated by XRD, SEM and fluorescence spectrophotometer, respectively. The samples doped with Eu 3+ , Lu 3+ and PO 4 3- can maintain the body-centered tetragonal structure of ScVO 4 and the morphology essentially remains unchanged with slight agglomeration. The excitation spectrum intensity of Sc 0.88 Lu 0.05 (V 1-x P x )O 4 :Eu 3+ 0.07 increase within the near UV excitation (360-410nm). The optimum doping concentration of PO 4 3- is 0.2(x value), and the maximum emission intensity of Sc 0.88 Lu 0.05 (V 0.8 P 0.2 )O 4 :Eu 3+ 0.07 is about 35 % higher than the Sc 0.88 Lu 0.05 VO 4 :Eu 3+ 0.07 under 365 nm excitation. Decay curve of 5 D 0 state for as-prepared samples fits the single order exponential behavior, the lifetime of 5 D 0 increase first and then decrease with the increase of PO 4 3- doping concentration. The internal quantum efficiency is up to 66.73% under 365nm excitation, When the temperature rises to 200°C, the emission intensity maintains 79.3% of that in the room temperature. Sc 0.88 Lu 0.05 (V 0.8 P 0.2 )O 4 :Eu 3+ 0.07 phosphor shows high internal quantum efficiency and thermal stability, which is suitable for the UV-pumped white LED as red phosphor.
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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 | 0.034 | 0.024 |
| Meta-epidemiology (narrow) | 0.019 | 0.018 |
| Meta-epidemiology (broad) | 0.022 | 0.006 |
| Bibliometrics | 0.010 | 0.015 |
| Science and technology studies | 0.016 | 0.024 |
| Scholarly communication | 0.017 | 0.027 |
| Open science | 0.026 | 0.015 |
| Research integrity | 0.009 | 0.005 |
| Insufficient payload (model declined to judge) | 0.003 | 0.007 |
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".