XANES and XEOL Investigation of Cerium and Terbium Co-Doped Silicon Oxide Films
Bibliographic record
Abstract
The luminescent and structural properties of cerium and terbium co-doped silicon oxide thin films were investigated through transmission electron microscopy, photoluminescence spectroscopy, and synchrotron-based X-ray absorption spectroscopy. While combined blue and green luminescence characteristic of Ce3+ and Tb3+ ions, respectively, was observed from different compositions of films, the emission intensity from samples in which Ce2Si2O7 nanocrystallites were formed after high temperature annealing was much stronger than in films where the Ce and Tb co-dopants were incorporated in an amorphous SiO2 host matrix. Films containing the cerium silicate phase also exhibited a very strong enhancement of Tb emission. X-ray absorption near edge structure and X-ray excited optical luminescence analysis at the Si L3,2-, Si K-, O K-, Ce N4-, and Ce M5,4-edges indicated this enhancement was likely the result of a direct energy transfer process between the cerium silicate and Tb levels.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".