Fully Epitaxial Semiconductor Photoelectrode for UV–VIS Dual-Band Photodetection
Why this work is in the frame
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Bibliographic record
Abstract
High-performance spectrally distinctive photodetectors (PDs) are of great importance in sensing and information processing. PDs based on photoelectrochemical (PEC) principles are of particular interest due to their simple fabrication process and tunable photoresponse through both physical and chemical processes. Despite the recent advancement in PEC-PDs, they are far less ideal. For example, most of them are either not stable or not compatible with existing epitaxial semiconductor device platforms, whereas although III-nitride nanowire-based PEC-PDs can largely mitigate these drawbacks, dual-band photodetection is limited to the ultraviolet (UV) range. Herein, we show that by using fully epitaxial n-GaN/p-InGaN p–n heterojunction photoelectrodes on the Si substrate, the dual-band photodetection of III-nitride nanowire-based PEC-PDs can be extended to the visible (VIS) range. Moreover, the present photoelectrodes can also exhibit dual-polarity photocurrent under a fixed illumination condition by tuning the applied potential, extending their functionality. This study represents the first achievement of UV–VIS dual-band photodetection with simple, fully epitaxial semiconductor nanowire p–n heterojunctions. The discussion on the photocarrier dynamics further sheds light on the design of dual-band PEC-PDs based on emerging semiconductor nanowire p–n heterojunctions.
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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 | 0.001 | 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) | 0.001 | 0.001 |
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