Wide Bandgap Polymer Donors Based on Succinimide‐Substituted Thiophene for Nonfullerene Organic Solar Cells
Bibliographic record
Abstract
Abstract The advent of nonfullerene acceptors (NFAs) has greatly improved the photovoltaic performance of organic solar cells (OSCs). However, to compete with other solar cell technologies, there is a pressing need for accelerated research and development of improved NFAs as well as their compatible wide bandgap polymer donors. In this study, a novel electron‐withdrawing building block, succinimide‐substituted thiophene (TS), is utilized for the first time to synthesize three wide bandgap polymer donors: PBDT‐TS‐C5 , PBDT‐TSBT‐C12 , and PBDTF‐TSBT‐C16 . These polymers exhibit complementary bandgaps for efficient sunlight harvesting and suitable frontier energy levels for exciton dissociation when paired with the extensively studied NFA, Y6. Among these donors, PBDTF‐TSBT‐C16 demonstrates the highest hole mobility and a relatively low highest occupied molecular orbital (HOMO) energy level, attributed to the incorporation of thiophene spacers and electron‐withdrawing fluorine substituents. OSC devices based on the blend of PBDTF‐TSBT‐C16 :Y6 achieve the highest power conversion efficiency of 13.21%, with a short circuit current density ( J sc ) of 26.83 mA cm −2 , an open circuit voltage ( V oc ) of 0.80 V, and a fill factor of 0.62. Notably, the V oc × J sc product reaches 21.46 mW cm −2 , demonstrating the potential of TS as an electron acceptor building block for the development of high‐performance wide bandgap polymer donors in OSCs.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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 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".