Long-term, intermittent testing of sandwich polymer light-emitting electrochemical cells
Bibliographic record
Abstract
The long-term luminance decay of sandwich polymer light-emitting electrochemical cells has been investigated. The cells have been operated multiple times over a period of four months, all under a constant current density of 167 mA/cm2. In-between the constant-current runs, the cells were stored at room temperature for up to two months. We identify several factors that affect the luminance and its decay. The peak luminance reached during the virgin runs decreases if the cells are stored after the deposition of the top electrode. During operation, the luminance also decreases after reaching a peak value. However, extended storage at room temperature leads to the recovery of the peak luminance. The luminance recovery can be attributed to the relaxation of doping which reverses the effect of luminescence quenching. A long term, irreversible luminance decay is also observed and attributed to the formation of non-emitting, non-conductive black spots which leads to the loss of emitting area and an increased effective current density. The results illustrate the importance both On and Off states in characterizing the stability of polymer LECs.
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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 | 0.001 |
| 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".