Charge Transport Layer Capacitance Contribution to Si Solar Cell Optoelectronic Properties Investigated Using Photocarrier Radiometry
Bibliographic record
Abstract
The question of identifying the dominant capacitance in Si solar cell optoelectronic transport phenomena under open circuit conditions is explored using quantitative noncontacting laser photocarrier radiometry (PCR) as a dynamic spectrally gated photoluminescence method. The combined theoretical and experimental approach addresses the dependence of the PCR signal on the capacitance of the charge transport layer (CTL) and of the base layer of the p-n junction which, in conjunction with the solar cell series resistance, form <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">RC</i> diffusive time constants shown to be sensitively measurable using PCR frequency scans. The experimental strategy is based on the dependence of layer capacitance on the laser-illuminated area and involves frequency responses under partial or total surface area illumination. It is shown that the recombination lifetime and CTL diffusion lifetime <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${{\tau }_{RC}}$</tex-math></inline-formula> are mainly responsible for the kinetics and extraction of nonequilibrium optically generated carrier density waves in three types of photovoltaic Si solar cells. It is concluded that <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${{\tau }_{RC}},\ $</tex-math></inline-formula>which is related to the thin upper CTL and the associated recombination lifetime, plays the main role in the dynamic optoelectronic PCR frequency response of all tested devices. <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${\rm{Through\ the\ capacitance\ of\ this\ layer}},\ {{\tau }_{RC}}$</tex-math></inline-formula> strongly affects free photocarrier transport across the p-n junction, surface distribution, and electrode collection, therefore CTL capacitance should become a major focus of solar efficiency enhancement designs and studies.
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.
How this classification was reachedexpand
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 | 0.001 | 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 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".