(Invited) Strategies for Isolating Colloidal Quantum Dot Luminescence from External Fluctuations: Alloyed Shells on CdSe and Mn<sup>2+</sup> Doping of ZnSe
Bibliographic record
Abstract
ZnxCd1-xS alloyed shells and Mn2+ ions were studied as means to confine charge carriers away from the surface of nanocrystals. In the former case, the electron confinement potential increased with the Zn fraction in CdSe/ZnxCd1-xS colloidal quantum dots and their photoluminescence blueshifted by ~50 nm. However, structural defects and polydispersity became important in samples with x >0.7 likely due to a phase transition and to strain increasing with core/shell lattice mismatch reaching 12% when x = 1. In the latter case, the Mn2+ ions diffused within MnyZn1-ySe/ZnSe nanocrystals act as localized luminescent centers and their density can be controlled with the Mn fraction in the alloyed core. The ions are excited through energy transfers from excitons in the ZnSe, and given the long lifetime of the Mn2+ first excited state, thermoactivated reverse energy transfer also occurred and emission from the ZnSe excitons was observed.
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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".