Siloxane‐Functionalized Silicon Phthalocyanine OTFTs: High Hole Mobility and Unexpected <i>p</i> ‐Type Character
Bibliographic record
Abstract
Abstract Phthalocyanines are widely used in organic electronics due to their excellent chemical stability and tunable electronic properties, but their synthesis and purification often present significant challenges due to their low solubility. An alternative synthesis for a siloxane‐substituted silicon phthalocyanine ( iso (Si 3 O) 2 SiPc) is reported and its integration as an active semiconducting material in organic thin‐film transistors (OTFTs) is demonstrated. This compound is easily synthesized and purified, exhibits high solubility, and achieves a hole mobility exceeding 1 cm 2 V −1 s −1 under ambient conditions—a record high mobility for silicon phthalocyanines (SiPcs). Moreover, SiPcs usually behave as n ‐type semiconductors, and iso (Si 3 O) 2 SiPc unexpectedly displays a unipolar p ‐type character. The semiconducting behavior is investigated through a combination of density functional theory (DFT) calculations and experimental characterization of thin‐film transistors. In particular, thin film characterization using GIWAXS reveals a high degree of crystallinity with an exceptionally uniform crystalline texture of iso (Si 3 O) 2 SiPc, supporting efficient charge transport and demonstrating the material's strong potential for high‐performance OTFT applications. These results highlight the importance of siloxane‐based functional groups as an effective strategy to develop high‐performance, conjugated small‐molecule‐based OTFTs.
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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 | 0.000 | 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) | 0.002 | 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".