Comparison of Alq3/alkali-metal fluoride/Al cathodes for organic electroluminescent devices
Bibliographic record
Abstract
The tris-(8-hydroxy-quinolinato) aluminum (Alq3)∕LiF∕Al cathode is one of the most studied interfaces in organic electronics. Charge injection properties of the other alkali-metal fluorides (i.e., NaF, KF, RbF and CsF) at the Alq3/electron injection layer/Al cathode interface of organic light emitting diodes were studied. It is found, in contrast to most literature, that the alkali-metal fluorides all yield equivalent device performance, despite the significant difference in the physiochemical properties of these metal fluorides. The observed phenomena are explained by the comparable strong intrinsic molecular dipole moment of these fluorides, which result in strong interfacial dipoles at the Alq3∕Al interface. This is consistent with ultraviolet photoelectron spectroscopy results and recent theory in literature. Difference in thickness dependence was also observed. LiF is found to be unique amongst the alkali-metal fluorides in terms of the thickness dependence of the device performance. This trend is found to strongly correlate with the growth mode of the metal fluoride on the Alq3 surface; LiF quickly transitions to layer-by-layer growth after the initial island nucleation, while the other alkali-metal fluorides tend to grow as clustered islands on top of a surface wetting layer.
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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 | 0.000 | 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".