Photosensitive Polymer Thin-Film FETs Based on Poly(3-octylthiophene)
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Bibliographic record
Abstract
The effects of white light on the electrical performance of polymer thin-film transistors (PTFTs) based on regioregular poly(3-octylthiophene) (P3OT) are investigated. Upon illumination, a significant increase in the PFET's drain current is observed with a maximum photosensitivity of 10/sup 4/ in the subthreshold operation and a broad-band responsivity with a maximum value of 160 mA/W at irradiance of 1.7 mW/cm/sup 2/ and at low gate biases. The photosensitivity decreases with the increase in the absolute gate bias. The simultaneous control of the device with both the gate voltage and illumination is possible at low irradiances of <0.7 mW/cm/sup 2/. It is found that the illumination effectively decreases the threshold voltage of the device, but it does not change the field-effect mobility. Using a trap model, it is shown that the narrow layers close to the drain and source contacts with high concentrations of defects are two possible regions for photogeneration of excitons and separation of charges. Using the theory of space-charge limited conduction, the extracted band mobility for P3OT is 0.08 cm/sup 2//V/spl middot/s, while a mobility of 8/spl times/10/sup -5/cm/sup 2//V/spl middot/s is found for the regions next to the source and drain contacts. The PTFT's high photosensitivity at zero gate voltage suggests a simple design of low-voltage, high-sensitivity two-terminal photodetectors for applications in large-area flexible optoelectronics.
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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