Silicon solar cell electrical parameter measurements through quantitative lock‐in carrierographic (photoluminescence) and thermographic imaging
Why this work is in the frame
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Bibliographic record
Abstract
We demonstrate theoretically and experimentally quantitative long‐pass filtered lock‐in carrierography (LIC) or lock‐in photoluminescence (LIP) imaging and perform comparisons with lock‐in thermography (LIT) imaging of industrial Si solar cells. Optoelectronic LIP and thermoelectronic LIT imaging modalities are used for non‐destructive, non‐contact measurements of the electrical parameters of solar cells from images obtained at various external load resistances. It is shown that quantitative surface‐averaged pixel brightness statistical distributions derived from near‐infrared (NIR) LIP and mid‐infrared LIT images can be used to measure, among other parameters, photogeneration current density, diode saturation current density, ideality factor, and maximum power photovoltage of a multi‐crystalline Si solar cell. LIP images were found to have superior contrast and spatial resolution to the respective LIT images. The electrical parameter values measured from the images were found to be in very good agreement with each other and with electrical measurements (EM). The theory further allows for the generation of derivative diode saturation current density and ideality factor images.
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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 | 0.001 |
| 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