Perovskite Photovoltaics: Pick FAPbI <sub>3</sub> and Stick to It
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
The choice of the perovskite composition is pivotal for solar cells. In this Perspective, we argue that, among known perovskite compositions, formamidinium lead iodide (FAPbI 3 ) stands out due to its optimal bandgap, absence of halide segregation observed in mixed-halide alloys, and immunity against oxidation unlike in tin-based perovskites. However, stabilizing the photoactive α-FAPbI 3 remains a major challenge, as it readily transforms into the thermodynamically stable δ-FAPbI 3 at room temperature. In this Perspective, we briefly review the challenges in stabilizing α-FAPbI 3, summarize strategies to address this instability with minimal and no bandgap penalty, and offer our outlook on future directions: (i) stabilization of α-FAPbI 3 without bandgap compromise; (ii) understanding the mechanisms of additive-less stabilized α-FAPbI 3 single-crystal perovskite solar cells (PSCs); (iii) development of all-ambient air fabricated tandem solar cells using α-FAPbI 3 as a narrow-bandgap subcell; and (iv) adoption of only green solvents to enable scalable, sustainable, and widespread manufacturing of perovskite solar modules.
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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 | 0.000 |
| 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) | 0.000 | 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