التفاصيل البيبلوغرافية
| العنوان: |
Synergetic Effect of Side-Chain Engineering of Polymer Donors and Conformation Tuning of Small-Molecule Acceptors on Molecular Properties, Morphology, and Photovoltaic Performance |
| المؤلفون: |
Mingfan Li (11189675), Min Zeng (247802), Xuejiao Tang (2884478), Tao Zheng (146941), Chao Weng (3701881), Ping Shen (149355) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Biotechnology, Plasma Physics, Space Science, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, alkylthiothiophene side chain exhibits, synergetic effect, morphology, alkylthiophenylthiophene side chain, HOMO, device performance, PST-TTC, power conversion efficiency, PCE, Y 6, polymer donors, conformation, side-chain engineering, PSC, SMA, PSPT-TTC, gap, ITIC, side chains, photovoltaic performance, U-shaped Y 6 |
| الوصف: |
It is demonstrated that the side-chain engineering of polymer donors and molecular conformation of small-molecule acceptors (SMAs) plays a crucial role in the morphology and photovoltaic performance of polymer solar cells (PSCs). However, the synergetic effect of these two aspects has been rarely reported. Herein, two wide-band gap donor–acceptor (D–A) copolymers ( PST-TTC and PSPT-TTC ) featuring the same main-chain backbone but different conjugated side chains were developed and combined with three low-band gap symmetric SMAs ( ITIC , DTCFO-ICCl , and Y6 ) with various molecular conformations (S-shape, C-shape, and U-shape) to investigate the synergetic effect of side-chain engineering of polymer donors and conformation manipulation of SMAs on molecular properties, device physics, film morphology, and photovoltaic performance. The results indicate that PST-TTC with an alkylthiothiophene side chain exhibits a broader absorption spectrum, a smaller optical band gap (1.95 vs 1.99 eV), and a deeper-lying highest occupied molecular orbital (HOMO) level (−5.39 vs −5.36 eV) as compared to PSPT-TTC with an alkylthiophenylthiophene side chain. The PSCs were constructed according to the different donor/acceptor combinations based on the two as-synthesized polymers and three selected SMAs. After optimization, PST-TTC paired with S-shaped ITIC provides a power conversion efficiency (PCE) of 10.10% and the PCE can be further improved up to 10.60% when C-shaped DTCFO-ICCl was used to replace ITIC as the acceptor. However, the device performance becomes worse, accompanied with a sharply reduced PCE of 7.36% after the substitution of ITIC for U-shaped Y6 . On the contrary, when the paired donor was changed to PSPT-TTC , the PSPT-TTC : Y6 -based PSC achieves a remarkably increased PCE of up to 11.46%. These delicate observations suggest that the polymer donor with different conjugated side chains should collaborate with symmetric SMAs possessing various molecular conformations to realize superior morphology and device ... |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Synergetic_Effect_of_Side-Chain_Engineering_of_Polymer_Donors_and_Conformation_Tuning_of_Small-Molecule_Acceptors_on_Molecular_Properties_Morphology_and_Photovoltaic_Performance/15060128 |
| DOI: |
10.1021/acsaem.1c01418.s001 |
| الاتاحة: |
https://doi.org/10.1021/acsaem.1c01418.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.4C47D8C6 |
| قاعدة البيانات: |
BASE |