H-induced effects in luminescent silicon nanostructures obtained from plasma enhanced chemical vapor deposition grown SiyO1−y:H(y>1∕3) thin films annealed in (Ar+5%H2)
Bibliographic record
Abstract
Si y O 1 − y : H (y=0.36 and 0.42) alloy films were fabricated by electron cyclotron resonance plasma enhanced chemical vapor deposition and subsequently annealed in (Ar+5%H2) at different temperatures. Glancing angle x-ray diffraction and Fourier transform infrared spectroscopy measurements revealed the formation of silicon nanoclusters (Si-ncl) in an amorphous SiO2 matrix for films annealed at temperatures of 900°C and above. Negligible photoluminescence (PL) was observed at room temperature for the as-grown samples; however, PL bands appeared in the visible after the annealing treatments. The PL intensities are much higher and the spectra skewed to the red as compared to data obtained for similar samples annealed in pure Ar. These effects are attributed to the passivation by H atoms of nonradiative recombination centers in the materials annealed in (Ar+5%H2). The overall analysis of the PL data indicates that both quantum confinement and defect states contribute to the luminescence. Two-step annealing procedures [in Ar and then in (Ar+5%H2)] were found to yield slightly higher passivation efficiencies than single annealing steps in (Ar+5%H2).
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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) | 0.001 | 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".