Photoluminescence of highly porous nanostructured Si-based thin films deposited by pulsed laser ablation
Bibliographic record
Abstract
Nanostructured, Si-based cottonlike, highly porous thin films of Si, SiNx, and SiOx were deposited by the excimer laser ablation of Si targets in He, He∕N2, and He∕O2 ambients, respectively. Photoluminescence (PL), x-ray photoelectron spectroscopy, and photoacoustic Fourier transform IR have been used to characterize these deposits. After exposure to air, broad PL bands appear at 1.7eV (Si), 2.0eV (SiNx), and 2.3eV (SiOx); air oxidation causes the separation of the PL spectra into two identical component peaks, at 1.5 and 2.3eV, whose relative ratios differ with film composition. The present results indicate that the red PL peak at 1.5eV is due to the localized states at the oxidized surfaces of these materials, while the green PL peak at 2.3eV is due to oxygen-related defects in their local disordered nanostructures.
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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 | 0.000 | 0.000 |
| 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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| 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".