Understanding charge transport in vacuum deposited Schottky organic solar cells with microsecond transient photocurrent measurements
Bibliographic record
Abstract
Schottky-junction organic solar cells have been a topic of intense research in recent times due to their surprisingly high performance. Some aspects of their device physics are well understood but charge transport in neat-C60 and donor-doped Schottky junction OSCs has not been studied in detail so far. In this study, charge transport in neat-C60 OSCs is examined by studying the performance of these OSCs as a function of C60 active layer thickness. Surprisingly, the fillfactor of the neat-C60 Schottky OSC does not degrade for layer thicknesses between 20 nm – 80 nm indicating that charge transport is not an issue. However, the short-circuit current decreases significantly due to a reduction in the builtin voltage. The dissociation of excitons formed in C60 aggregates is preferentially reduced. Devices with thicker C60 layers and consequently, higher C60 aggregation, were found to have greater recombination. Finally, charge mobility in C60 films with aggregates is found to be lower than charge mobility in films with little to no aggregation.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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".