Near-Unity Broadband Quantum Efficiency Enabled by Colloidal Quantum Dot/Mixed-Organic Heterojunction
Bibliographic record
Abstract
Solution-processed semiconducting materials are promising for realizing high-performance, low-cost, and flexible energy conversion devices. In particular, hybrid structures comprising colloidal quantum dots (CQDs) and organic molecules have been proposed to achieve broadband absorption across the visible-to-infrared solar spectrum. However, the photophysical mismatch present at CQD/organic interfaces limits charge extraction, resulting in low power conversion efficiency (PCE). In this study, we sought to overcome this photophysical mismatch, addressing the CQD/organic interface using a library of surface ligands with different functions. We established, using both experiments and theoretical calculations, that thiol termination of the CQD surface reduced the interfacial barrier, resulting in a 4-fold higher charge transfer efficiency at the maximum power point bias. The CQD/mixed-organic heterojunction solar cells exhibit a record photocurrent density of 33.3 mA/cm 2 and near-unity broadband quantum efficiency up to 1100 nm, demonstrating the potential of these devices to harvest infrared solar photons in all-solution-processed tandem devices.
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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 | 0.000 |
| 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 | 0.000 |
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".