Synthesis and Up-Conversion Luminescence Properties of Er~(3+)/Yb~(3+) Codoped SrF_2 Nanocrystals
Bibliographic record
Abstract
Nanocrystals of up-conversion phosphor Er3+ and Yb3+ co-doped SrF2 were prepared by hydrother malmethod using Polyethylene Glycol as dispersant.Under 980 nm laser diode excitation,the impact of different concentration of Er3+ ions on the up-conversion luminescence intensity was discussed.The up-conversion mechanism and processes were also analyzed.Ground state absorption,excitation state absorption and energy transfer were used in discussing the up-conversion mechanism of the sample and up-conversion mechanism models of sample was discussed in detail.The sample was characterized by transmission electron microscopy(TEM) and X-ray diffraction(XRD).The results showed that the sample was successfully synthesized by hydrothermal method at 180 ℃ and the average grain size is about 50 nm.When cYb3+∶cEr3+is 4∶1 and the doped concentration of Er3+ ions is 1.3mol%,the up-conversion intensity get the most.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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; a candidate call from one teacher head, not a consensus.
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".