Synthesis and characterization of dialkoxynaphthalene-based new π-conjugated copolymer for photovoltaic solar cell

• Published in: Macromolecular research Vol. 19; no. 2; pp. 197 - 202
• Main Authors: Kwon, Jun Ho, Yeo, Hyun-Dong, Cha, Hyo-Jung, Lee, Min Jung, Park, Hyun-Tae, Park, Jin-Hee, Park, Chan-Eon, Kim, Yun-Hi
• Format: Journal Article
• Language: English
• Published: Heidelberg The Polymer Society of Korea 01.02.2011; 한국고분자학회
• Subjects: Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Nanochemistry; Nanotechnology; Physical Chemistry; Polymer Sciences; Soft and Granular Matter; 고분자공학; photovoltaic solar cell; conjugated copolymer; donor-acceptor copolymer
• ISSN: 1598-5032; 2092-7673
• DOI: 10.1007/s13233-011-0211-7

A π -conjugated dialkoxynaphthalene-based donor-acceptor copolymer was synthesized by a Suzuki coupling reaction, and its photophysical, thermal and electrochemical properties and photovoltaic characteristics were characterized. The copolymer showed good solubility and a weight average molecular weight of 11,500. The new copolymer was characterized by two absorption bands at 315 and 403 nm in the dilute solution, which were assigned to the π → π * transition and an intramolecular charge transfer band, respectively. The wide band gap of the donor-acceptor copolymer was explained by the 3-dimensional structure and tortional angle between the dialkoxynaphthalene and benzothiadiazole of the model compound. The PCE of the photovoltaic solar cell device fabricated using this copolymer reached 0.06% with a V oc , J sc , and FF of 0.59, 0.3, and 33%, respectively.