Synthesis and Characterization of Cyclopentadithiophene and Thienothiophene-Based Polymers for Organic Thin-Film Transistors and Solar Cells

• Published in: Macromolecular research Vol. 26; no. 10; pp. 934 - 941
• Main Authors: Madathil, Pramod Kandoth, Cho, Shinuk, Choi, Sinil, Kim, Tae-Dong, Lee, Kwang-Sup
• Format: Journal Article
• Language: English
• Published: Seoul The Polymer Society of Korea 01.10.2018; Springer Nature B.V; 한국고분자학회
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Energy conversion efficiency; Heterojunctions; Nanochemistry; Nanotechnology; Optical properties; Photovoltaic cells; Physical Chemistry; Polymer Sciences; Polymers; Semiconductor devices; Soft and Granular Matter; Solar cells; Thin film transistors; Transistors; 고분자공학; organic solar cells; organic thin film transistors; donor-donor type conjugated polymers
• ISSN: 1598-5032; 2092-7673
• DOI: 10.1007/s13233-018-6130-0

Novel donor-donor type alternating copolymers (8CDT-TT and 16CDT-TT) derived from cyclopentadithiophene (CDT) and thienothiophene (TT) moieties that differ from solubilizing side chains were successfully synthesized and characterized. After the synthesis of CDT-TT-based conjugated polymers with dioctyl and dihexadecyl side chains, their optical, thermal, structural and semiconducting properties were investigated. Organic thin-film transistors fabricated from 8CDT-TT and 16CDT-TT exhibit carrier mobilities as high as 3.92×10 -4 and 1.05×10 -3 cm2V -1 s -1 , respectively. Bulk heterojunction solar cells fabricated using a polymer:PCBM blend ratio of 1:3 exhibit power conversion efficiencies of 2.12 and 1.84% for 8CDT-TT and 16CDT-TT, respectively.