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Synthesis and characterization of polythiophene containing side chain electron acceptor for OPV
- Issue Date
- Jun-2022
- Publisher
- Taylor & Francis
- Keywords
- Organic photovoltaic; semiconducting polymers; long wave absorption; side chain effect
- Citation
- Molecular Crystals and Liquid Crystals, v.733, no.1, pp 76 - 85
- Pages
- 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- Molecular Crystals and Liquid Crystals
- Volume
- 733
- Number
- 1
- Start Page
- 76
- End Page
- 85
- ISSN
- 1542-1406
1543-5318
- Abstract
- The two new semiconducting polymers, poly((sexithiophene-5,5'''''-diyl)bis(tridecan-1-one))(PSTTO) and poly((sexithiophene-5,5'''''-diyl)bis(tridecan-1-one)bithiophene) (PSTTOBT), are synthesized and characterized. PSTTO and PSTTOBT have backbone donor and side chain acceptor structure. Compare to poly(3-hexylthiophene), both polymers had deep HOMO levels of 5.15 and 5.14 eV, respectively, due to intramolecular repulsing between the main chain and side chain as well as the introduction of electron withdrawing side chains. In addition, the introduction of bithiophene into the repeating unit of PSTTOBT showed increased long wave absorption and better intermolecular interaction. PSTTO and PSTTOBT based cell showed power conversion efficiencies of 1.1% and 1.6%, respectively.
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