Electronically Passivated Hole‐Blocking Titanium Dioxide/Silicon Heterojunction for Hybrid Silicon Photovoltaics
Why this work is in the frame
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Bibliographic record
Abstract
Carrier‐selective heterojunctions are important for low‐cost silicon‐based photovoltaic applications. A low temperature (<100 °C) chemical vapor deposition technique is used here to deposit ultrathin (n‐type) titanium dioxide (TiO 2 ) layers onto hydrogen‐passivated surfaces of crystalline‐silicon (c‐Si). Energy level alignment and chemical composition at these abrupt, interfacial layer‐free TiO 2 /Si heterojunctions are investigated via ultraviolet, X‐ray, and inverse photoemission spectroscopy, for c‐Si doping ranging from p ++ (10 19 ) to n ++ (10 19 ). The interface Fermi level position and device‐relevant TiO 2 /Si band offsets are found to shift monotonically as a function of the Si doping, revealing the absence of Fermi level pinning at the c‐Si interface and pointing to simple Fermi level equilibration as the driving mechanism behind the interface energy level alignment. Electrical transport measurements performed on TiO 2 /Si‐based diodes confirm the energy level alignment yielded by spectroscopic measurements and the hole‐blocking properties of the TiO 2 /Si heterojunction, exclude hole conduction in the TiO 2 as a transport mechanism, and show carrier recombination at the TiO 2 /p‐Si heterojunction.
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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 it