Postripening Fabrication and Self‐Driven Narrowband Photoresponse of Large‐Grain, Phase‐Pure CsPbBr<sub>3</sub> Films
Why this work is in the frame
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Bibliographic record
Abstract
Halide perovskites have shown high potential for developing self‐driven filterless narrowband photodetectors with the advantages of excellent color recognition, low cost, and simple design. Among the various perovskites, all‐inorganic perovskites are most promising for optoelectronic devices due to their unmatched thermal stability, but they are often more difficult to be fabricated into a phase‐pure form with large grain sizes. Herein, for the first time, a self‐driven all‐inorganic perovskite narrowband photodetector (PNPD) fabricated by a scalable postripening aerosol–liquid–solid deposition method in ambient conditions is reported. Significantly, simply applying a short thermal stress to a pristine film with heterogeneous phases and small grain sizes triggers Ostwald ripening and leads to more than tenfold enlarged grains of phase‐pure CsPbBr 3 with considerably improved optoelectronic properties. The self‐driven CsPbBr 3 ‐based all‐inorganic PNPD shows a narrowband response, with a peak responsivity of 106.6 mA W −1 , specific detectivity of 2.2 × 10 12 Jones at 535 nm, and a narrow full width at half maximum of only 15 nm, placing it among the best of its kind. The PNPD is also fast ( t rise / t fall = 3.9/3.21 ms) and stable (above 10 000 on/off switches). This work opens the path of tapping all‐inorganic perovskites for next‐generation optoelectronics with high performance and reliability.
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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