Modeling of the effects of charge transport on voltage-dependent photocurrent in ultrathin CdTe solar cells
Bibliographic record
Abstract
An analytical model is developed to study the current–voltage characteristics of CdTe thin film solar cells by incorporating exponential photon absorption, carrier trapping, carrier drift, and diffusion in the photon absorber layer. An analytical expression for the external voltage-dependent photocurrent is derived, considering partial depletion of the absorber layer at operating terminal voltage. The overall load current is calculated considering the actual solar spectrum and dark current components. The analytical model is verified by Taurus Medici simulation and published experimental results for different absorber layer thicknesses. A good agreement of the analytical and numerical models with experimental data is ensured by reducing carrier lifetimes in the thinner absorber layers. The hole lifetime is reduced drastically by decreasing the width of the absorber layer from 1.1 to 0.5 μm, and the cell efficiency depends critically on the transport properties of the holes. The results of this paper indicate that the improvement of the charge transport properties in submicron CdTe solar cells is extremely important to increase the power conversion efficiency.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".