Solar blind UV photodiodes with 100% internal quantum efficiency based on silicon direct band gap
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
5 mm diameter silicon photodiodes having 30-50 nm electrically active thicknesses were fabricated on silicon-on insulator (SOI) wafers to realize solar blind UV photodiodes (UVTN). Their responsivity measurements in the 200-1100 nm range indicated that responsivities drop sharply after 350 nm. Silicon direct bandgap is 3.5 eV which corresponds to 354 nm. Thus, these devices act as wide band gap semiconductor photodiodes like SiC, GaN, AlGaN, diamond etc. UV/VUV/EUV filters can be directly deposited on UVTN detectors to limit their response to specific wavelengths. Four filtered UVTN photometers devoid of chronic red leak and associated electronics will fit in a 1 U CubeSat which can be used to make solar UV/VUV/EUV spectral measurements. Because of their minuscule silicon thickness, UVTN detectors will have low responsivity to x-rays and other space radiation and also will be very hard to space radiation. Thus, these devices are expected to survive in the deep space environment for several decades for applications like water detection (165 nm strong reflection) on small bodies as desired by NASA’s Small Bodies Assessment Group. As the solar blind material is silicon which is high volume manufacturing compatible, this is a disruptive technology development and will have numerous application in space research. For example, one may use UVTN pixels in an imaging array to get a true solar blind (no red leak) UV/VUV/EUV imager with 100% IQE.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 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