Influence of the Densification Process on the Thermoelectric Properties of p-Type SnSe Co-doped with Na and Cu as well as Na and Ag
Bibliographic record
Abstract
SnSe has been at the forefront of thermoelectric material research ever since its single crystal was reported to exhibit record-breaking peak zT values in excess of 2 along two directions some 10 years ago. Recent reports indicated the importance of the processing parameters for its transport properties, notably including the purification methods to remove oxide impurities. Here, we investigated the different influences of different consolidation methods on the properties including the stability of SnSe using different p -type dopants, comparing hot pressing with spark plasma sintering. Ultimately, we were able to achieve very comparable results with hot pressing as with spark plasma sintering, which bodes well for the upscaling of the process in industrial settings. In fact, the highest zT value of 0.96 at 673 K was obtained for a hot-pressed sample codoped with Na and Ag. Notably, the Ag-containing samples exhibited higher zT values than those with Cu. However, since all samples began to exhibit cracks after the measurements and inconsistently changing thermoelectric properties, the stability of these materials needs to be improved before any potential usage in a thermoelectric device.
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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) | 0.000 | 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) | 0.000 | 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".